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ATGLATGL
Waukesha EngineBHP / IMP Prediction (version 1.6)
Waukesha EngineBHP / IMP Prediction (version 1.6)
VHP GLVHP GL
VHP GSIVHP GSI
VHP Series FourVHP Series Four
VHP GVHP G
VGF GLDVGF GLD
VGF GL LCRVGF GL LCR
VGF GSIDVGF GSID
To calculate brake horsepower and intake manifold pressure select your engine type and provide the necessary data. Instructions are available for each engine family.
To calculate brake horsepower and intake manifold pressure select your engine type and provide the necessary data. Instructions are available for each engine family.
Note: This program in no way guarantees engine performance. All conditions entered in this program should be within standard operating conditions, or conditions granted in an SAA.
Note: This program in no way guarantees engine performance. All conditions entered in this program should be within standard operating conditions, or conditions granted in an SAA.
Save Program to C:\BHP_PRED Wauk v1_6.xlsSave Program to C:\BHP_PRED Wauk v1_6.xls
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 2 2
Select Engine Model:
Engine/Site4 Required Inputs: 8LAT27GL Values Multiplier Resultant
Power (Bhp) 0.0259 0Intake Manifold Temperature (°F) 0.0564 0
Exhaust Manifold Pressure (inHG gauge) 0.194 0Engine Speed (RPM) -0.0318 0
Ignition Timing (°BTDC) -0.168 0Exhaust Oxygen (dry volume %) 3.27 0
Altitude (ft) 0.000806 0Intercept 1 -25.9 -25.9
0 0 0
Calculated Intake Manifold Pressure (inHG gauge) -26
0
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2748C or latest revision)Dry Commercial Quality Natural Gas0 – 220 psi BMEP90 – 149° F Intercooler Water Inlet Temperature700 – 1000 RPM Engine Speed4 – 22° BTDC Ignition Timing35 – 95 WKI™
** Accuracy is ±5% on power, and ±2.3 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a AT27GL engine
Calculated kWb
28:1 – 36:1 (9.8 – 12.2% O2, dry) Mass Air/Fuel Ratio
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
ATGLATGL MenuMenuClearClear
ATGL InstructionsATGL Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 2 1
Select Engine Model:
Engine/Site7 Required Inputs: F2895GL Values Multiplier Resultant
Power (Bhp)Intake Manifold Temperature (°F) 0.0148 0
Engine Speed (RPM) 0.0038 0Bhp / RPM 86.5Altitude (ft) 0.001 0
Intercept 1 -22.2 -22.2
Calculated Intake Manifold Pressure (inHG gauge) -22
0
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2755B or latest revision)65 – 160 psi BMEP85 – 130° F Intercooler Water Inlet Temperature800 – 1200 RPM Engine SpeedStandard Ignition Timing
** Accuracy is ±5% on power, and ±2 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VHP-GL engine
Calculated kWb
28:1 (9.8% O2, dry) Mass Air/Fuel Ratio
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VHP GLVHP GL MenuMenuClearClear
VHP InstructionsVHP Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 1
Select Engine Model:
Engine/Site3 Required Inputs: L7042GSI Values Multiplier Resultant
Intake Manifold Pressure (inHG gauge) 15.6 0Intake Manifold Temperature (°F) -0.964 0
Engine Speed (RPM) 0.838 0IMP x RPM 0.0302
Exhaust Oxygen (dry volume %) -50.9 0Altitude (ft) -0.0458 0
Intercept 1 262 262
Calculated Bhp 262
195
Calculated BMEP (psi)Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2755B or latest revision)65 – 160 psi BMEP85 – 130° F Intercooler Water Inlet Temperature800 – 1200 RPM Engine SpeedStandard Natural Gas Ignition TimingExhaust Oxygen (0.3% to 1.3% dry)
** Accuracy is ±5% on power, and ±2 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VHP-GSI engine
Calculated kWb
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VHP GSIVHP GSI MenuMenuClearClear
VHP InstructionsVHP Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 2
Select Engine Model:
Engine/Site6 Required Inputs: F3524GSI Values Multiplier Resultant
Power (Bhp) 0.0416 0Intake Manifold Temperature (°F) 0.0398 0
Engine Speed (RPM) -0.0243 0Ignition Timing (°BTDC) -0.2765 0
Waukesha Knock IndexTM (WKITM) 0.0603 0Exhaust Oxygen (dry volume %) 1.359 0
Altitude (ft) 0.001 0Intercept 1 -0.295 -0.295
Calculated Intake Manifold Pressure (inHG gauge) 0
0
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2755B or latest revision)50 – 173 psi BMEP115 – 143° F Intake Manifold Temperature181 – 242° F Jacket Water Outlet Temperature37 – 94 WKI™700 – 1200 RPM Engine Speed12 – 27° BTDC Ignition Timing0.16 – 1.56% (Dry) Exhaust Oxygen for GSI's7.5 – 8.2% (Dry) Exhaust Oxygen for LT's
** Accuracy is ±5% on power, and ±2 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VHP-GSI, GL Series Four engine
Calculated kWb
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VHP Series FourVHP Series Four MenuMenuClearClear
VHP InstructionsVHP Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 1
Select Engine Model:
Engine/Site7 Required Inputs: F2895G Values Multiplier Resultant
Compression Ratio (8.2 or 10) 5.24 0Intake Manifold Pressure (inHG gauge) 4.24 0
Intake Manifold Temperature (°F) 460 460Engine Speed (RPM) 0.41 0
IMP x RPM 0.0166Exhaust Oxygen (dry volume %) -25.3 0
Altitude (ft) -0.012 0Intercept 1 10.7 10.7
Calculated Bhp
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2755B or latest revision)45 – 110 psi BMEP50 – 110° F Inlet Air Temperature800 – 1200 RPM Engine SpeedStandard Natural Gas Ignition TimingExhaust Oxygen 0.3% to 1.3% dry
** Accuracy is ±5% on power, and ±2 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VHP-G engine
Calculated kWb
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VHP GVHP G MenuMenuClearClear
VHP InstructionsVHP Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 2
Select Engine Model:
Engine/Site5 Required Inputs: F18GL/GLD (11:1) Values Multiplier Resultant
Power (Bhp) 0.1142 0Intake Manifold Temperature (°F) 0.1017 0
Engine Speed (RPM) -0.0104 0Ignition Timing (°BTDC) -0.3539 0
Exhaust Oxygen (dry volume %) 2.028 0Altitude (ft) 0.001 0
Intercept 1 -24.9 -24.9
Calculated Intake Manifold Pressure (inHG gauge) -25
0
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2749D or latest revision)
75 – 185 psi BMEP130 – 175° F Intercooler Water Inlet Temperature1400 – 1800 RPM Engine Speed8 – 13° BTDC Ignition Timing24:5 – 25:1 Mass Air/Fuel Ratio11:1 Compression Ratio
** Accuracy is ±5% on power, and ±2.0 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VGF-GL/GLD engine
Calculated kWb
Dry Commercial Quality Natural (64 – 90 WKI™)
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VGF GLDVGF GLD MenuMenuClearClear
VGF InstructionsVGF Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 1
Select Engine Model:
Engine/Site5 Required Inputs: F18GL (8.7:1) Values Multiplier Resultant
Intake Manifold Pressure (inHG gauge) 7.699 0Intake Manifold Temperature (°F) -0.179 0
Engine Speed (RPM) 0.05419 0Ignition Timing (°BTDC) 8.385 0
Exhaust Oxygen (dry volume %) -40.403 0Waukesha Knock IndexTM (WKITM) -0.5036 0
Altitude (ft) -0.0077 0Intercept 1 266 266
Calculated Bhp 266
198
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2749D or latest revision)
50 – 176 psi BMEP121 – 168° F Intercooler Water Inlet Temperature1400 – 1800 RPM Engine Speed14 – 28° BTDC Ignition Timing
8.7:1 Compression Ratio5.6 – 57.1 psi Exhaust Manifold Pressure
** Accuracy is ±6% on power** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VGF-GL Low Compression Ratio (LCR) engine
Calculated kWb
Dry Commercial Quality Natural (34 – 95 WKI™)
5.9 – 7.8% O2, dry Exhaust Oxygen
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VGF GL LCRVGF GL LCR MenuMenuClearClear
VGF InstructionsVGF Instructions
Waukesha Engine, Dresser, Inc. Bhp-Pred v1.6
Customer: Waukesha EngineProject:
Engine Information:Calculated By:
Date Performed:Additional Notes:
Calculate: 2
Select Engine Model:
Engine/Site5 Required Inputs: F18GSID Values Multiplier Resultant
Power (Bhp) 0.02914 0Engine Speed (RPM) -0.002593 0
Bhp / RPM 89.61Intake Manifold Temperature (°F) 0.04127 0
Ignition Timing (°BTDC) -0.1281 0Exhaust Oxygen (dry volume %) 0.844 0
Altitude (ft) -0.001 0Intercept 1 -19 -19
Calculated Intake Manifold Pressure (inHG gauge) -19
0
Calculated BMEP (psi)
Calculated BMEP (bar)
Based on the following data ranges: (Reference Service Bulletin 14-2749D or latest revision)
75 –185 psi BMEP0 – 16 in Hg (gauge) Intake Manifold Pressure130 – 175° F Intercooler Water Inlet Temperature1000 – 1800 RPM Engine Speed16 – 28° BTDC Ignition Timing15:5 – 18:1 Mass Air/Fuel Ratio8.7:1 Compression Ratio
** Accuracy is ±3% on power, and ±1.0 inHG for intake manifold pressure** The above calculation is intended as a guide for estimating average horsepower or intake manifold pressure for a VGF-GSID engine
Calculated kWb
Dry Commercial Quality Natural (64 – 90 WKI™)
BHP IMP
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VGF GSIDVGF GSID MenuMenuClearClear
VGF InstructionsVGF Instructions
VGF GL, GLD & GSID Series Engines:
2. There are many factors that influence the accuracy of the formulas. The most influential are:A. Exhaust Oxygen:
B. Spark Timing:
C. Intake Manifold Pressure Measurements:
D. Intake Manifold Temperature Measurement:
E. Site Altitude:Altitude must be known at the engine site. Altitude is measured in feet.
F. Exhaust Manifold Pressure:
FORMULAS FOR ESTIMATING VGF GL, GLD, & GSID BRAKE HORSEPOWER AND INTAKE MANIFOLD PRESSURE
1. The following are guides for estimating the average brake horsepower or intake manifold pressure of VGF GL & GLD engines using standard timing. If the nameplate timing specifies a timing other than the standard timing ranges listed below, these formulas will not apply. The formulas are based on a statistical average of test data. Reference Service Bulletin 14-2749C (or latest revision).
The only accepted method of measurement is with an exhaust oxygen meter analyzer to measure the percentage of exhaust O2 present. Any other method will only increase the margin of error. See S-sheet S8483 (or latest revision) for percentages of excess exhaust oxygen as related to the carburetor adjustment. The measurement must be taken at the exhaust elbows. Reference Service Bulletin 14-2749C (or latest revision).
For ignition timing refer to the timing ranges listed below. Reference Service Bulletin 14 2749C (or latest revision).
Use the taps that are provided in the intake manifold. Pressures are measured in inches of mercury (inches Hg gauge) with a digital manometer. Reference Service Bulletin 14 2749C (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the intake manifold. Temperatures should be measured by thermocouple for maximum accuracy. Reference Service Bulletin 14 2749C (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VGFVGFMenuMenu
VGF GLD CalculationVGF GLD Calculation
VGF GL LCR CalculationVGF GL LCR Calculation
VGF GSID CalculationVGF GSID Calculation
G. Engine Speed:Use a digital tachometer to measure engine speed.
The formulas for VGF "GL/GLD" 11:1 CR gas engines are based on the following data ranges:
75 – 185 psi BMEP130 – 175° F Intercooler Temperature1400 – 1800 rpm engine speed8 – 13° BTDC ignition timing24.5: to 25:1 mass air/fuel ratio
Accuracy is ±5% on power and ±2% inches Hg for intake manifold pressure at rated load.
The formulas for VGF "GSID" 8.7:1 CR gas engines are based on the following ranges:
75 – 175 psi BMEP0 – 16 inches Hg intake manifold pressure130 – 160° F intercooler water temperature1000 – 1800 rpm engine speed16 – 28° BTDC ignition timing15.5 to 18.0 mass air/fuel ratio
Accuracy is ±3% on power and ±1.0 Inches Hg for intake manifold pressure at rated load.
Table 1. Standard Ignition Timing Chart for VGF GL, GLD & GSID Engines
Model Speed Range Timing CRVGF GL/GLD 1200 – 1800 13° BTDC 11:1VGF GSID 1350 – 1800 23° BTDC 8.7:1
To calculate power or intake manifold pressure use the following procedure:
Use the taps that are provided in the exhust outlet. Pressures are measured in inches of mercury (Inches of Hg) by a mechanical device.
3. The engine must be in good operating condition and properly adjusted in order to obtain reasonable agreement with these formulas.
4. These formulas are only good for engines operating on commercial quality natural gas (64 – 90 WKI™). The use of other fuels will increase the margin of error.
NOTE: Changing the engine timing will also the exhaust emissions and fuel economy.
CAUTION! Engine damage may result if detonation occurs. If detonation occurs at the specified name plate timing, a timing adjustment be made to retard the ignition timing until NO audible detonation exists.
a. Enter the value of each parameter identified in Column 1, into Column 2. use the units as given in Column 1. Use the units as given in Column 1.
TO GO BACK TO THE CALCULATION CLICK ON THE ICON AT THE TOP OF THE DOCUMENT
b. After entering the values in Column 2, the program will automatically multiply by the constants in Column 3, calculate the results and total in Column 4.
VHP G Series Engines:
2. There are many factors that influence the accuracy of the formulas. The most influential are:
A. Exhaust Oxygen:
Reference Service Bulletin 14-2755A (or latest revision).
B. Spark Timing:
C. Intake Manifold Pressure Measurements:
D. Intake Manifold Temperature Measurement:
E. Site Altitude:Altitude must be known at the engine site. Altitude is measured in feet.
F. Engine Speed:
FORMULAS FOR ESTIMATING VHP G, GL, GSI, & Series Four BRAKE HORSEPOWER AND INTAKE MANIFOLD PRESSURE
1. The following are guides for estimating the average brake horsepower or intake manifold pressure of VHP-G engines using standard timing. If the nameplate timing specifies a timing other than the standard timings listed in Table 1 or Table 2, these formulas will not apply. The formulas are based on a statistical average of test data. Reference Service Bulletin 14-2755A (or latest revision).
The only accepted method of measurement is with an exhaust oxygen meter analyzer to measure the percentage of exhaust O2 present. Any other method will only increase the margin of error. See S-sheet S8483 (or latest revision) for percentages of excess exhaust oxygen as related to the carburetor adjustment. The measurement must be taken at the exhaust elbows.
For ignition timing refer to Table 1 and Table 2 below. Reference Service Bulletin 14 2755A (or latest revision).
Use the taps that are provided in the intake manifold. Pressures are measured in inches of 'mercury (inches Hg gauge) with a digital manometer. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the intake manifold. Temperatures should be measured by thermocouple for maximum accuracy. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
VHPVHPMenuMenu
VHP GL CalculationVHP GL Calculation
VHP GSI CalculationVHP GSI Calculation
VHP Series Four™ CalculationVHP Series Four™ Calculation
VHP G CalculationVHP G Calculation
Use a digital tachometer to measure engine speed.
The formulas below for VHP "G" gas engines are based on the following data ranges:45 – 110 psi BMEP50 – 110° F inlet air temperature800 – 1200 rpm engine speedStandard natural gas ignition timingExhaust oxygen 0.3% to 1.3% dry
Accuracy is ±5% on power and ±2 inches Hg for intake manifold pressure at rated load.
Table 1. Standard Ignition Timing Chart for "G" 8:1 Compression Ratio Engines
Engine 900 – 1200 RPMF2895G 24° BTDCF3521G 24° BTDCL5108G 24° BTDCL5790G 24° BTDCL7042G 24° BTDCP9390G 28° BTDC
Table 2. Standard Ignition Timing Chart for "G" 10:1 Compression Ratio Engines
Engine 600 – 1000 RPM 1001 – 1200 RPMF2895G 20° BTDC 20° BTDCF3521G 22° BTDC 24° BTDCL5108G 22° BTDC 24° BTDCL5790G 20° BTDC 20° BTDCL7042G 22° BTDC 24° BTDCP9390G 24° BTDC 24° BTDC
To calculate power or intake manifold pressure use the following procedure:
3. The engine must be in good operating condition and properly adjusted in order to obtain reasonable agreement with these formulas.
4. These formulas are only good for engines operating on commercial quality natural gas. The use of other fuels will increase the margin of error.
NOTE: Changing the engine timing will also the exhaust emissions and fuel economy.
CAUTION! Engine damage may result if detonation occurs. If detonation occurs at the specified name plate timing, a timing adjustment be made to retard the ignition timing until NO audible detonation exists.
a. Enter the value of each parameter identified in Column 1, into Column 2. use the units as given in Column 1. For naturally aspirated engines, intake manifold pressure is actually a vacuum, therefore enter this value as a negative, with a minus "-" sign in front of it. The factor "Intake Manifold Pressure (Inches Hg gauge) X Engine Speed (rpm) will also be negative.
Definitions:
______= Intake Manifold Pressure (inches Hg gauge) At Site Intake Manifold Temperature
______= Intake Manifold Pressure (inches Hg gauge) At 77° F Intake Manifold Temperature
______= Intake Manifold Temperature (°F) Measured At Site
VHP GSI Series Engines:
2. There are many factors that influence the accuracy of the formulas. The most influential are:A. Exhaust Oxygen:
B. Spark Timing:
C. Intake Manifold Pressure Measurements:
D. Intake Manifold Temperature Measurement:
E. Site Altitude:Altitude must be known at the engine site. Altitude is measured in feet.
b. After entering the values in Column 2, the program will automatically multiply by the constants in Column 3, calculate the results and total in Column 4.
c. The total BHP or IMP result at standard temperature (77° F) in Column 4 will automatically be inserted into the BHP77 or IMP77 in Column 7. Enter the value for the Intake Manifold Temperature at Site (IMTsite ) or (BHPsite) in Column 5. The BHPsite or IMPsite will be calculated in Column 6.
IMPsite
IMP77
IMTsite
1. The following are guides for estimating the average brake horsepower or intake manifold pressure of 'VHP-GSI engines using standard timing. If the nameplate timing specifies a timing other than the standard timings listed in Table 3, these formulas will not apply. The formulas are based on a statistical average of test data. Reference Service Bulletin 14-2755A (or latest revision).
The only accepted method of measurement is with an exhaust oxygen meter analyzer to measure the percentage ofexhaust O2 present. Any other method will only increase the margin of error. See S-sheet S8483 (or latest revision) for percentages of excess exhaust oxygen as related to the carburetor adjustment. The measurement must betaken at the exhaust elbows before the turbocharger. Reference Service Bulletin 14 2755A (or latest revision).
For ignition timing refer to Table 3 below. Reference Service Bulletin 14-2755A (or latest revision).
Use the taps that are provided in the intake manifold. Pressures are measured in inches of mercury (inches Hg gauge) with a digital manometer. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the intake manifold. Temperatures should be measured by 'thermocouple for maximum accuracy. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
F. Engine Speed:Use a digital tachometer to measure engine speed.
The formulas below for VHP "GSI" gas engines are based on the following data ranges:65 – 160 psi BMEP85 – 130° F inlet water temperature800 – 1200 rpm engine speedStandard natural gas ignition timingExhaust oxygen 0.3% to 1.3% dry
Accuracy is ±5% on power and ±2 inches Hg for intake manifold pressure at rated load.
Table 3. Standard Ignition Timing Chart for "GSI" Engines
Engine 600 – 1000 RPM 1001 – 1200 RPMF2895 21° BTDC 21° BTDCF3521 24° BTDC 24° BTDCL5108 18° BTDC 15° BTDCL5790 21° BTDC 21° BTDCL7042 24° BTDC 24° BTDCP9390 21° BTDC 21° BTDC
To calculate power or intake manifold pressure use the following procedure:
VHP GL Series Engines:
3. The engine must be in good operating condition and properly adjusted in order to obtain reasonable agreement with these formulas.
4. These formulas are only good for engines operating on commercial quality natural gas. The use of other fuels will increase the margin of error.
NOTE: Changing the engine timing will also the exhaust emissions and fuel economy.
CAUTION! Engine damage may result if detonation occurs. If detonation occurs at the specified name plate timing, a timing adjustment be made to retard the ignition timing until NO audible detonation exists.
a. Enter the value of each parameter identified in Column 1, into Column 2. Use the units as given in Column 1.
b. After entering the values in Column 2, the program will automatically multiply by the constants in Column 3, calculate the BHP results and total in Column 4.
1. The following are guides for estimating the average brake horsepower or intake manifold pressure of VHP-GL engines using standard timing. If the nameplate timing specifies a timing other than the standard timings listed in Table 3, these formulas will not apply. The formulas are based on a statistical average of test data. Reference Service Bulletin 14-2755A (or latest revision).
2. There are many factors that influence the accuracy of the formulas. The most influential are:A. Exhaust Oxygen:
B. Spark Timing:
C. Intake Manifold Pressure Measurements:
D. Intake Manifold Temperature Measurement:
E. Site Altitude:Altitude must be known at the engine site. Altitude is measured in feet.
F. Exhaust Manifold Pressure:
G. Engine Speed:Use a digital tachometer to measure engine speed.
The only accepted method of measurement is with an exhaust oxygen meter analyzer to measure the percentage of exhaust O2 present. Any other method will only increase the margin of error. See S-sheet S8483 (or latest revision) for percentages of excess exhaust oxygen as 'related to the carburetor adjustment. The measurement must be taken at the exhaust elbows before the turbocharger. Reference Service Bulletin 14 2755A (or latest revision).
For ignition timing refer to Table 4 below. Reference Service Bulletin 14-2755A (or latest revision).
Use the taps that are provided in the intake manifold. Pressures are measured in inches of mercury (inches Hg gauge) with a digital manometer. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the intake manifold. Temperatures should be measured by thermocouple for maximum accuracy. Reference Service Bulletin 14 2755A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the exhaust outlet. Pressures are measured in inches of mercury (inches Hg) by a mechanical device.
NOTE: Other methods of measurement may increase the margin of error.
3. The engine must be in good operating condition and properly adjusted in order to obtain reasonable agreement with these formulas.
4. These formulas are only good for engines operating on commercial quality natural gas. The use of other fuels will increase the margin of error.
NOTE: Changing the engine timing will also the exhaust emissions and fuel economy.
The formulas below for VHP "GL" gas engines are based on the following data ranges:2895GL, 3521GL, 5790GL,7042GL,9390GL Engines
65 – 160 psi BMEP85 – 130° F inlet water temperature800 – 1200 rpm engine speedStandard natural gas ignition timing
Accuracy is ±5% on power and ±2 inches Hg for intake manifold pressure at rated load.
Table 4. Standard Ignition Timing Chart for "GL" Engines
Engine 600 – 1000 RPM 1001 – 1200 RPMF2895 10° BTDC 11° BTDCF3521 10° BTDC 10° BTDCL5108 14° BTDC 14° BTDCL5790 10° BTDC 11° BTDCL7042 10° BTDC 10° BTDCP9390 10° BTDC 10° BTDC
To calculate power or intake manifold pressure use the following procedure:
TO GO BACK TO THE CALCULATION CLICK ON THE ICON AT THE TOP OF THE DOCUMENT
CAUTION! Engine damage may result if detonation occurs. If detonation occurs at the specified name plate timing, a timing adjustment be made to retard the ignition timing until NO audible detonation exists.
Lambda=1.74 (9.8% O2 dry)
a. Enter the value of each parameter identified in Column 1, into Column 2. Use the units as given in Column 1.
b. After entering the values in Column 2, the program will automatically multiply by the constants in Column 3, calculate the BHP results and total in Column 4.
AT27GL Series Engines:
2. There are many factors that influence the accuracy of the formulas. The most influential are:
A. Exhaust Oxygen:
B. Spark Timing:For ignition timing refer to Table 1 below. Reference Service Bulletin 14-2748A (or latest revision).
C. Intake Manifold Pressure Measurements:
D. Intake Manifold Temperature Measurement:
E. Site Altitude:Altitude must be known at the engine site. Altitude is measured in feet.
F. Engine Speed:Use a digital tachometer to measure engine speed.
FORMULAS FOR ESTIMATING AT27GL BRAKE HORSEPOWER AND INTAKE MANIFOLD PRESSURE
1. The following are guides for estimating the average brake horsepower or intake manifold pressure of AT27GL engines using standard timing. If the nameplate timing specifies a timing other than the standard timings listed in Table 1, these formulas will not apply. The formulas are based on a statistical average of test data. Reference Service Bulletin 14-2748A (or latest revision).
The only accepted method of measurement is with an exhaust oxygen meter analyzer to measure the percentage of exhaust O2 present. Any other method will only increase the margin of error. See S-sheet S8483 (or latest revision) for percentages of excess exhaust oxygen as related to the carburetor adjustment. The measurement must be taken at the exhaust elbows. Reference Service Bulletin 14-2748A (or latest revision).
Use the taps that are provided in the intake manifold. Pressures are measured in inches of mercury (inches Hg gauge) with a digital manometer. Reference Service Bulletin 14-2748A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Use the taps that are provided in the intake manifold. Temperatures should be measured by thermocouple for maximum accuracy. Reference Service Bulletin 14-2748A (or latest revision).
NOTE: Other methods of measurement may increase the margin of error.
Waukesha EngineBHP / IMP PredictionWaukesha EngineBHP / IMP Prediction
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ATGL CalculationATGL Calculation
The formulas below for 8L & 12V AT27GL gas engines are based on the following data ranges:80 – 209 psi BMEP90 – 130° F inlet air temperature800-1000 rpm engine speed4 – 22° BTDC ignition timingExhaust oxygen 9.8% to 11.2% dry (28:1 to 32:1 mass air/fuel ratio)
The formulas below for the 16V-AT27GL gas engine are based on the following data ranges:80 – 220 psi BMEP90 – 149° F inlet air temperature700 – 1000 rpm engine speed35 to 95 WKI™8 – 22° BTDC ignition timingExhaust oxygen 10.4% to 12.2% dry (29:1 to 36:1 mass air/fuel ratio)
Table 1. Standard Ignition Timing Chart for AT27GL 9:1 Compression Ratio Engines
Engine 800 – 1000 RPM8L 20° BTDC12V 18° BTDC16V 22° BTDC
To calculate power or intake manifold pressure use the following procedure:
3. The engine must be in good operating condition and properly adjusted in order to obtain reasonable agreement with these formulas.
4. These formulas are only good for engines operating on commercial quality natural gas. The use of other fuels will increase the margin of error.
NOTE: Changing the engine timing will also the exhaust emissions and fuel economy.
CAUTION! Engine damage may result if detonation occurs. If detonation occurs at the specified name plate timing, a timing adjustment be made to retard the ignition timing until NO audible detonation exists.
Accuracy is ±225 for the 16V-AT27GL, ± 150 BHP for the 12V-AT27GL and ± 110 BHP for the 8L-AT27GL (±5% at rated power) and ±2.3 inches Hg for intake manifold pressure at rated load.
a. Enter the value of each parameter identified in Column 1, into Column 2. use the units as given in Column 1.
b. After entering the values in Column 2, the program will automatically multiply by the constants in Column 3, calculate the results and total in Column 4.
Engine Models
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"SELECT MODEL"16VAT27GL12VAT27GL8LAT27GL
"SELECT MODEL" "SELECT MODEL" "SELECT MODEL" "SELECT MODEL"P9390GL P9390GSI P9390G 5115GLL7042GL L7042GSI L7042GL5790GL L5790GSI L5790GL5108GL L5108GSI L5108GF3521GL F3521GSI F3521GF2895GL F2895GSI F2895G
"SELECT MODEL" "SELECT MODEL" "SELECT MODEL"P48GSIDL36GSIDH24GSIDF18GSID
P48GL/GLD (11:1)L36GL/GLD (11:1)H24GL/GLD (11:1) H24GL (8.7:1)F18GL/GLD (11:1) F18GL (8.7:1)
IMP
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ATGL 2 16VAT27GL IMP Multiplier Result
Power (Bhp) 0.00953 0Intake Manifold Temperature (°F) 0.072 0
Exhaust Manifold Pressure (inHG gauge) 0.628 0Engine Speed (RPM) -0.03185 0
Ignition Timing (°BTDC) -0.197 0Exhaust Oxygen (dry volume %) 3.195 0
0.034 0Altitude (ft) 0.001 0
Intercept 1 -32.4 -32.4
Calculated Intake Manifold Pressure (inHG gauge) -32
3 12VAT27GL IMP Multiplier ResultPower (Bhp) 0.0162 0
Intake Manifold Temperature (°F) 0.0566 0Exhaust Manifold Pressure (inHG gauge) 0.293 0
Engine Speed (RPM) -0.0321 0Ignition Timing (°BTDC) -0.362 0
Exhaust Oxygen (dry volume %) 2.53 0Altitude (ft) 0.000707 0
Intercept 1 -15.5 -15.5
Calculated Intake Manifold Pressure (inHG gauge) -15.5
4 8LAT27GL IMP Multiplier ResultPower (Bhp) 0.0259 0
Intake Manifold Temperature (°F) 0.0564 0Exhaust Manifold Pressure (inHG gauge) 0.194 0
Engine Speed (RPM) -0.0318 0
Ignition Timing (°BTDC) -0.168 0Exhaust Oxygen (dry volume %) 3.27 0
Altitude (ft) 0.000806 0Intercept 1 -25.9 -25.9
Calculated Intake Manifold Pressure (inHG gauge) -25.9
Waukesha Knock IndexTM (WKITM)
IMP
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VHP-GL2 P9390GL IMP Multiplier
Power (Bhp)Intake Manifold Temperature (°F) 0.0278
Engine Speed (RPM) 0.00699Bhp / RPM #DIV/0! 26.4
Altitude (ft) 0.001Intercept 1 -28.3
Calculated Intake Manifold Pressure (inHG gauge)
3 L7042GL IMP MultiplierPower (Bhp)
Intake Manifold Temperature (°F) 0.0691Engine Speed (RPM) 0.003
Bhp / RPM #DIV/0! 35.1Altitude (ft) 0.001
Intercept 1 -27.9
Calculated Intake Manifold Pressure (inHG gauge)
4 L5790GL IMP MultiplierPower (Bhp)
Intake Manifold Temperature (°F) 0.0244Engine Speed (RPM) 0.00194
Bhp / RPM #DIV/0! 43.3Altitude (ft) 0.001
Intercept 1 -21.5
Calculated Intake Manifold Pressure (inHG gauge)
5 L5108GL IMP MultiplierPower (Bhp)
Intake Manifold Temperature (°F) 0.0479Engine Speed (RPM) -0.00018
Bhp / RPM #DIV/0! 49.9Altitude (ft) 0.001
Intercept 1 -22.9
Calculated Intake Manifold Pressure (inHG gauge)
6 F3521GL IMP Multiplier
Power (Bhp)Intake Manifold Temperature (°F) 0.00138
IMP
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Engine Speed (RPM) 0.00369Bhp / RPM #DIV/0! 71.2Altitude (ft) 0.001
Intercept 1 -22.7
Calculated Intake Manifold Pressure (inHG gauge)
7 F2895GL IMP MultiplierPower (Bhp)
Intake Manifold Temperature (°F) 0.0148
Engine Speed (RPM) 0.0038Bhp / RPM #DIV/0! 86.5Altitude (ft) 0.001
Intercept 1 -22.2
Calculated Intake Manifold Pressure (inHG gauge)
IMP
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VHP-GL VHP-GSIResult 2 P9390GSI IMP
Power (Bhp)0 Intake Manifold Temperature (°F)0 Engine Speed (RPM)
#DIV/0! Bhp / RPM #DIV/0!
0 Exhaust Oxygen (dry volume %)-28.3 Altitude (ft)
Intercept 1#DIV/0!
Calculated Intake Manifold Pressure (inHG gauge)
Result3 L7042GSI IMP
0 Power (Bhp)0 Intake Manifold Temperature (°F)
#DIV/0! Engine Speed (RPM)0 Bhp / RPM #DIV/0!
-27.9 Exhaust Oxygen (dry volume %)
Altitude (ft)#DIV/0! Intercept 1
Calculated Intake Manifold Pressure (inHG gauge)Result
0 4 L5790GSI IMP0 Power (Bhp)
#DIV/0! Intake Manifold Temperature (°F)0 Engine Speed (RPM)
-21.5 Bhp / RPM #DIV/0!Exhaust Oxygen (dry volume %)
#DIV/0! Altitude (ft)Intercept 1
Result Calculated Intake Manifold Pressure (inHG gauge)
00 5 L5108GSI IMP
#DIV/0! Power (Bhp)0 Intake Manifold Temperature (°F)
-22.9 Engine Speed (RPM)Bhp / RPM #DIV/0!
#DIV/0! Exhaust Oxygen (dry volume %)Altitude (ft)
Intercept 1Result
Calculated Intake Manifold Pressure (inHG gauge)0
IMP
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0#DIV/0! 6 F3521GSI IMP
0 Power (Bhp)-22.7 Intake Manifold Temperature (°F)
Engine Speed (RPM)#DIV/0! Bhp / RPM #DIV/0!
Exhaust Oxygen (dry volume %)Altitude (ft)
Result Intercept 1
0 Calculated Intake Manifold Pressure (inHG gauge)
0#DIV/0!
0 7 F2895GSI IMP-22.2 Power (Bhp)
Intake Manifold Temperature (°F)#DIV/0! Engine Speed (RPM)
Bhp / RPM #DIV/0!Exhaust Oxygen (dry volume %)
Altitude (ft)Intercept 1
Calculated Intake Manifold Pressure (inHG gauge)
IMP
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VHP-GSI VHP - SERIES 4Multiplier Result 2 L7044GSI IMP
0.00538 0 Power (Bhp)-0.00255 0 Intake Manifold Temperature (°F)-0.00404 0 Engine Speed (RPM)
11.2 #DIV/0! Ignition Timing (°BTDC)
1.63 00.001 0 Exhaust Oxygen (dry volume %)
-16.4 -16.4 Altitude (ft)Intercept
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
Multiplier Result0.00833 0 3 L5794GSI IMP
0.025 0 Power (Bhp)-0.00495 0 Intake Manifold Temperature (°F)
13.2 #DIV/0! Engine Speed (RPM)xPower (BHP)1.14 0 Ignition Timing (°BTDC)
0.001 0-19.2 -19.2 Exhaust Oxygen (dry volume %)
Barometer("Hg)Calculated Intake Manifold Pressure (inHG gauge) #DIV/0! Intercept
Multiplier Result0.00815 0
0.0374 0-0.00533 0 4 L5794LT IMP
17.7 #DIV/0! Engine Speed (RPM)1.34 0 Exhaust Oxygen (dry volume %)
0.001 0 Power (Bhp)-19.6 -19.6 Ignition Timing (°BTDC)
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0! Intake Manifold Temperature (°F)Altitude (ft)
InterceptMultiplier Result
0.00893 00.0349 0
-0.00515 021.6 #DIV/0! 5 L5774LT IMP1.36 0 Engine Speed (RPM)
0.001 0 Exhaust Oxygen (dry volume %)-19.5 -19.5 Power (Bhp)
Ignition Timing (°BTDC)
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!Intake Manifold Temperature (°F)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
IMP
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Altitude (ft)Multiplier Result Intercept
0.0206 00.0379 0
-0.00569 021.4 #DIV/0!1.16 0 6 F3524GSI IMP
0.001 0 Power (Bhp)-19.7 -19.7 Intake Manifold Temperature (°F)
Engine Speed (RPM)Calculated Intake Manifold Pressure (inHG gauge) #DIV/0! Ignition Timing (°BTDC)
Exhaust Oxygen (dry volume %)Multiplier Result Altitude (ft)
0.0183 0 Intercept0.0379 0
-0.00689 033.9 #DIV/0!
1.3 00.001 0-18.3 -18.3
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
Waukesha Knock IndexTM (WKITM)
IMP
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VHP - SERIES 4 VHP-GMultiplier Result 2 P9390G
0.022 0 Compression Ratio (8 or 10)0.03 0
-0.023 0 Intake Manifold Temperature (°F)-0.231 0
0.061 01.262 0 Exhaust Oxygen (dry volume %)
0.001 01 -2.282 -2.282
Calculated BHP -2 Calculated Intake Manifold Pressure (inHG gauge)
3Multiplier Result L7042G
0.0519 0 Compression Ratio (8 or 10)0.0632 0
-0.000024 0 Intake Manifold Temperature (°F)-0.222 0
0.0533 01.198 0 Exhaust Oxygen (dry volume %)
-1.521 01 15.791 15.791
Calculated Intake Manifold Pressure (inHG gauge)Calculated BHP 16
4 L5790GMultiplier Result Compression Ratio (8.2 or 10)
-0.0428 05.11 0 Intake Manifold Temperature (°F)
0.0437 0-0.893 0
0.046 0 Exhaust Oxygen (dry volume %)0.0266 0
-0.0005 01 -11.59 -11.59
Calculated Intake Manifold Pressure (inHG gauge)Calculated BHP -12
5 L5108GMultiplier Result Compression Ratio (8.2 or 10)
-0.0228 05.58 0 Intake Manifold Temperature (°F)
0.0377 0-0.61 0
0.06 0 Exhaust Oxygen (dry volume %)0.089 0
IMP
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0.0013 01 -41.91 -41.91
Calculated Intake Manifold Pressure (inHG gauge)Calculated BHP -42
6 F3521GMultiplier Result Compression Ratio (8 or 10)
0.0416 00.0398 0 Intake Manifold Temperature (°F)
-0.0243 0-0.2765 0
0.0603 0 Exhaust Oxygen (dry volume %)1.359 00.001 0
1 -0.295 -0.295Calculated Intake Manifold Pressure (inHG gauge)
Calculated BHP 0
7 F2895GCompression Ratio (8.2 or 10)
Intake Manifold Temperature (°F)
Exhaust Oxygen (dry volume %)
Calculated Intake Manifold Pressure (inHG gauge)
IMP
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VHP-G VGF-GL/GLDIMP Multiplier Result 2 P48GL/GLD
Compression Ratio (8 or 10) -0.596 0Power (Bhp) 0.00224 0
Intake Manifold Temperature (°F) 460 460Engine Speed (RPM) -0.00166 0
Bhp / RPM #DIV/0! 11.9 #DIV/0!Exhaust Oxygen (dry volume %) 1.57 0
Altitude (ft) 0.001 0Intercept 1 -14.9 -14.9
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP Multiplier Result 3 L36GL/GLDCompression Ratio (8 or 10) -0.365 0
Power (Bhp) 0.0062 0Intake Manifold Temperature (°F) 460 460
Engine Speed (RPM) -0.0032 0
Bhp / RPM #DIV/0! 13 #DIV/0!Exhaust Oxygen (dry volume %) 1.19 0
Altitude (ft) 0.001 0Intercept 1 -16.4 -16.4
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP Multiplier Result 4 H24GL/GLDCompression Ratio (8.2 or 10) -0.508 0
Power (Bhp) 0.00337 0Intake Manifold Temperature (°F) 460 460
Engine Speed (RPM) -0.00242 0Bhp / RPM #DIV/0! 19.8 #DIV/0!
Exhaust Oxygen (dry volume %) 1.25 0Altitude (ft) 0.001 0
Intercept 1 -14.8 -14.8
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP Multiplier Result 5 F18GL/GLDCompression Ratio (8.2 or 10) -0.429 0
Power (Bhp) 0.00561 0Intake Manifold Temperature (°F) 460 460
Engine Speed (RPM) -0.00327 0Bhp / RPM #DIV/0! 21.6 #DIV/0!
Exhaust Oxygen (dry volume %) 1.35 0Altitude (ft) 0.001 0
IMP
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Intercept 1 -14.4 -14.4
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP Multiplier ResultCompression Ratio (8 or 10) -0.0315 0
Power (Bhp) 0.0155 0Intake Manifold Temperature (°F) 460 460
Engine Speed (RPM) -0.00279 0Bhp / RPM #DIV/0! 23.2 #DIV/0!
Exhaust Oxygen (dry volume %) 1.43 0Altitude (ft) 0.001 0
Intercept 1 -20.2 -20.2
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP Multiplier ResultCompression Ratio (8.2 or 10) -0.281 0
Power (Bhp) 0.0118 0Intake Manifold Temperature (°F) 460 460
Engine Speed (RPM) -0.00263 0Bhp / RPM #DIV/0! 35.8 #DIV/0!
Exhaust Oxygen (dry volume %) 1.25 0Altitude (ft) 0.001 0
Intercept 1 -17.2 -17.2
Calculated Intake Manifold Pressure (inHG gauge) #DIV/0!
IMP
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VGF-GL/GLD VGF-GL LCRIMP Multiplier Result 2 P48GL
Power (Bhp) 0.0432 0Intake Manifold Temperature (°F) 0.0797 0
Engine Speed (RPM) -0.011 0Ignition Timing (°BTDC) -0.386 0
Exhaust Oxygen (dry volume %) 2.608 0Altitude (ft) 0.001 0
Intercept 1 -25.3 -25.3
Calculated Intake Manifold Pressure (inHG gauge) -25.3
IMP Multiplier Result 3 L36GLPower (Bhp) 0.0575 0
Intake Manifold Temperature (°F) 0.0797 0Engine Speed (RPM) -0.011 0
Ignition Timing (°BTDC) -0.386 0
Exhaust Oxygen (dry volume %) 2.608 0Altitude (ft) 0.001 0
Intercept 1 -25.3 -25.3
Calculated Intake Manifold Pressure (inHG gauge) -25.3
IMP Multiplier Result 4 H24GLPower (Bhp) 0.0863 0
Intake Manifold Temperature (°F) 0.0797 0Engine Speed (RPM) -0.011 0
Ignition Timing (°BTDC) -0.386 0Exhaust Oxygen (dry volume %) 2.608 0
Altitude (ft) 0.001 0Intercept 1 -24.9 -24.9
Calculated Intake Manifold Pressure (inHG gauge) -24.9
IMP Multiplier Result 5 F18GLPower (Bhp) 0.1142 0
Intake Manifold Temperature (°F) 0.1017 0Engine Speed (RPM) -0.0104 0
Ignition Timing (°BTDC) -0.3539 0Exhaust Oxygen (dry volume %) 2.028 0
Altitude (ft) 0.001 0Intercept 1 -24.9 -24.9
IMP
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VGF-GL LCRIMP Multiplier Result 2
NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!
NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!
NOT AVAILABLE N/A #VALUE!NOT AVAILABLE 1 N/A #VALUE!
Calculated Intake Manifold Pressure (inHG gauge) #VALUE!
IMP Multiplier Result 3NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!
NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE N/A #VALUE!NOT AVAILABLE 1 N/A #VALUE!
Calculated Intake Manifold Pressure (inHG gauge) #VALUE!
IMP Multiplier Result 4Power (Bhp) 0.0962 0
Intake Manifold Temperature (°F) 0.038 0Engine Speed (RPM) -0.0121 0
Ignition Timing (°BTDC) -0.9485 0Exhaust Oxygen (dry volume %) 4.496 0
Waukesha Knock IndexTM (WKITM) 0.037 0Altitude (ft) 0.001 0
Intercept 1 -15.6 -15.6
Calculated Intake Manifold Pressure (inHG gauge) -15.6
IMP Multiplier Result 5Power (Bhp) 0.1299 0
Intake Manifold Temperature (°F) 0.0233 0Engine Speed (RPM) -0.007 0
Ignition Timing (°BTDC) -1.089 0Exhaust Oxygen (dry volume %) 5.2479 0
0.0654 0Altitude (ft) 0.001 0
Waukesha Knock IndexTM (WKITM)
IMP
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VGF-GSIDP48GSID IMP Multiplier Result
Power (Bhp) 0.01093 0Engine Speed (RPM) -0.002593 0
Bhp / RPM 33.6 0Intake Manifold Temperature (°F) 0.04127 0
Ignition Timing (°BTDC) -0.1281 0Exhaust Oxygen (dry volume %) 0.844 0
Altitude (ft) -0.001 0Intercept 1 -19 -19
Calculated Intake Manifold Pressure (inHG gauge) -19
L36GSID IMP Multiplier ResultPower (Bhp) 0.01457 0
Engine Speed (RPM) -0.002593 0Bhp / RPM 44.8 0
Intake Manifold Temperature (°F) 0.04127 0
Ignition Timing (°BTDC) -0.1281 0Exhaust Oxygen (dry volume %) 0.844 0
Altitude (ft) -0.001 0Intercept 1 -19 -19
Calculated Intake Manifold Pressure (inHG gauge) -19
H24GSID IMP Multiplier ResultPower (Bhp) 0.02185 0
Engine Speed (RPM) -0.002593 0Bhp / RPM 67.2 0
Intake Manifold Temperature (°F) 0.04127 0Ignition Timing (°BTDC) -0.1281 0
Exhaust Oxygen (dry volume %) 0.844 0Altitude (ft) -0.001 0
Intercept 1 -19 -19
Calculated Intake Manifold Pressure (inHG gauge) -19
F18GSID IMP Multiplier ResultPower (Bhp) 0.02914 0
Engine Speed (RPM) -0.002593 0Bhp / RPM 89.61 0
Intake Manifold Temperature (°F) 0.04127 0Ignition Timing (°BTDC) -0.1281 0
Exhaust Oxygen (dry volume %) 0.844 0Altitude (ft) -0.001 0
IMP
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5115GL5115GL IMP Multiplier Result
Power (Bhp) 0.00699 0Intake Manifold Temperature (°F) 0.056 0
Exhaust Manifold Pressure (inHg gauge) 0.84 0Exhaust Oxygen (dry volume %) 0.42 0
Ignition Timing (°BTDC) -0.00899 0Waukesha Knock Index (WKI) 0.0205 0
Engine Speed (RPM) -0.0254 0Altitude (ft) 0.00016 0
Intercept 1 10.84 10.84
BHP
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ATGL VHP-GL VHP-GSI VHP - SERIES 4 VHP-G VGF-GL/GLD VGF-GL LCR VGF-GSID VHP-GL2 16VAT27GL BHP Multiplier Result 2 P9390GL BHP Multiplier Result 2 P9390GSI BHP Multiplier Result 2 L7044GSI BHP Multiplier Result 2 P9390G BHP Multiplier Result 2 P48GL/GLD BHP Multiplier Result 2 P48GL BHP Multiplier Result 2 P48GSID BHP Multiplier Result 5115GL
Intake Manifold Pressure (inHG gauge) 104.98 0 Intake Manifold Pressure ("Hg) Intake Manifold Pressure (inHG gauge) 15.4 0 Intake Manifold Pressure (inHG gauge) 45.99 0 Compression Ratio (8 or 10) 38.7 0 Intake Manifold Pressure (inHG gauge) 23.17 0 NOT AVAILABLE N/A #VALUE! Intake Manifold Pressure (inHG gauge) 10.62 0 Intake Manifold Pressure (inHg gauge)Intake Manifold Temperature (°F) -7.56 0 Intake Manifold Temperature (°F) -1.06 0 Intake Manifold Temperature (°F) -0.144 0 Intake Manifold Temperature (°F) -1.368 0 Intake Manifold Pressure (inHG gauge) 7.91 0 Intake Manifold Temperature (°F) -1.846 0 NOT AVAILABLE N/A #VALUE! Engine Speed (RPM) 0.3584 0
Exhaust Manifold Pressure (inHG gauge) -65.93 0 Engine Speed (RPM) 0.473 0 Engine Speed (RPM) 1.06 0 Engine Speed (RPM) 1.06 0 Intake Manifold Temperature (°F) 460 460 Engine Speed (RPM) 0.254 0 NOT AVAILABLE N/A #VALUE! IMP x RPM 0.01278 0 Exhaust Manifold Pressure (inHg gauge)Engine Speed (RPM) 3.343 0 IMP x RPM 0 0.0375 0 IMP x RPM 0 0.0445 0 Ignition Timing (°BTDC) 10.632 0 Engine Speed (RPM) 1.43 0 Ignition Timing (°BTDC) 8.938 0 NOT AVAILABLE N/A #VALUE! Intake Manifold Temperature (°F) -1.381 0
Ignition Timing (°BTDC) 20.69 0 Altitude (ft) -0.0375 0 Exhaust Oxygen (dry volume %) -97.5 0 -2.81 0 IMP x RPM 0 0.0622 0 Exhaust Oxygen (dry volume %) -60.42 0 NOT AVAILABLE N/A #VALUE! Ignition Timing (°BTDC) 4.018 0Exhaust Oxygen (dry volume %) -335.4 0 Intercept 1 335 335 Altitude (ft) -0.0599 0 Exhaust Oxygen (dry volume %) -58.05 0 Exhaust Oxygen (dry volume %) -111 0 Altitude (ft) -0.0232 0 NOT AVAILABLE N/A #VALUE! Exhaust Oxygen (dry volume %) -28.22 0
-3.575 0 Intercept 1 170 170 Altitude (ft) -0.046 0 Altitude (ft) -0.04 0 Intercept 1 587 587 NOT AVAILABLE N/A #VALUE! Altitude (ft) -0.01062 0Altitude (ft) -0.105 0 Calculated BHP 335 Intercept 1 104.94 104.94 Intercept 1 -232 -232 NOT AVAILABLE 1 N/A #VALUE! Intercept 1 163 163
Intercept 1 3402 3402 Calculated BHP 170 Calculated BHP 587Calculated BHP -271 Calculated BHP #VALUE! Calculated BHP 163
Calculated BHP 3402 3 L7042GL BHP Multiplier Result Calculated BHP 105Intake Manifold Pressure ("Hg) 3 L7042GSI BHP Multiplier Result
Intake Manifold Temperature (°F) -2.01 0 Intake Manifold Pressure (inHG gauge) 15.6 0 3 L7042G BHP Multiplier Result 3 L36GL/GLD BHP Multiplier Result 3 L36GL BHP Multiplier Result 3 L36GSID BHP Multiplier ResultEngine Speed (RPM) 0.461 0 Intake Manifold Temperature (°F) -0.964 0 3 L5794GSI BHP Multiplier Result Compression Ratio (8 or 10) 17.7 0 Intake Manifold Pressure (inHG gauge) 17.38 0 NOT AVAILABLE N/A #VALUE! Intake Manifold Pressure (inHG gauge) 7.965 0
3 12VAT27GL BHP Multiplier Result IMP x RPM 0 0.0281 0 Engine Speed (RPM) 0.838 0 IMP ("HG gauge) x Engine Speed(rpm) 0.0351 0 Intake Manifold Pressure (inHG gauge) 13.4 0 Intake Manifold Temperature (°F) -1.384 0 NOT AVAILABLE N/A #VALUE! Engine Speed (RPM) 0.2688 0Intake Manifold Pressure (inHG gauge) 60.2 0 Altitude (ft) -0.0281 0 IMP x RPM 0 0.0302 0 Intake Manifold Temperature (°F) -2.195 0 Intake Manifold Temperature (°F) 460 460 Engine Speed (RPM) 0.1904 0 NOT AVAILABLE N/A #VALUE! IMP x RPM 0.009585 0
Intake Manifold Temperature (°F) -2.18 0 Intercept 1 255 255 Exhaust Oxygen (dry volume %) -50.9 0 Engine Speed (RPM) 0.526 0 Engine Speed (RPM) 0.977 0 Ignition Timing (°BTDC) 6.704 0 NOT AVAILABLE N/A #VALUE! Intake Manifold Temperature (°F) -1.036 0Exhaust Manifold Pressure (inHG gauge) -15.7 0 Altitude (ft) -0.0458 0 Ignition Timing (°BTDC) 8.389 0 IMP x RPM 0 0.0381 0 Exhaust Oxygen (dry volume %) -45.32 0 NOT AVAILABLE N/A #VALUE! Ignition Timing (°BTDC) 3.014 0
Engine Speed (RPM) 1.85 0 Calculated BHP 255 Intercept 1 262 262 -2.055 0 Exhaust Oxygen (dry volume %) -58.8 0 Altitude (ft) -0.0174 0 NOT AVAILABLE N/A #VALUE! Exhaust Oxygen (dry volume %) -21.17 0Ignition Timing (°BTDC) 16.8 0 Exhaust Oxygen (dry volume %) -43.65 0 Altitude (ft) -0.03 0 Intercept 1 440 440 NOT AVAILABLE N/A #VALUE! Altitude (ft) -0.007965 0
Exhaust Oxygen (dry volume %) -217 0 Calculated BHP 262 Barometer ("Hg) 49.03 0 Intercept 1 46.2 46.2 NOT AVAILABLE 1 N/A #VALUE! Intercept 1 122 122Altitude (ft) -0.0445 0 4 L5790GL BHP Multiplier Result Intercept 1 -915.8 -915.8 Calculated BHP 440
Intercept 1 1657 1657 Intake Manifold Pressure ("Hg) Calculated BHP 54 Calculated BHP #VALUE! Calculated BHP 122Intake Manifold Temperature (°F) -0.575 0 Calculated BHP -916
Calculated BHP 1657 Engine Speed (RPM) 0.364 0 4 L5790GSI BHP Multiplier ResultIMP x RPM 0 0.0227 0 Intake Manifold Pressure (inHG gauge) 10.5 0 4 L5790G BHP Multiplier Result 4 H24GL/GLD BHP Multiplier Result 4 H24GL BHP Multiplier Result 4 H24GSID BHP Multiplier Result
Altitude (ft) -0.0227 0 Intake Manifold Temperature (°F) -1.01 0 Compression Ratio (8.2 or 10) 23.7 0 Intake Manifold Pressure (inHG gauge) 11.585 0 Intake Manifold Pressure (inHG gauge) 10.395 0 Intake Manifold Pressure (inHG gauge) 5.31 0Intercept 1 91.5 91.5 Engine Speed (RPM) 0.734 0 4 F5794LT BHP Multiplier Result Intake Manifold Pressure (inHG gauge) 1.8 0 Intake Manifold Temperature (°F) -0.9228 0 Intake Manifold Temperature (°F) -0.395 0 Engine Speed (RPM) 0.1792 0
4 8LAT27GL BHP Multiplier Result IMP x RPM 0 0.0274 0 Intake Manifold Pressure (inHG gauge) 22.9 0 Intake Manifold Temperature (°F) 460 460 Engine Speed (RPM) 0.127 0 Engine Speed (RPM) 0.12545 0 IMP x RPM 0.00639 0Intake Manifold Pressure (inHG gauge) 35 0 Calculated BHP 92 Exhaust Oxygen (dry volume %) -50.6 0 Intake Manifold Temperature (°F) -0.0609 0 Engine Speed (RPM) 0.954 0 Ignition Timing (°BTDC) 4.469 0 Ignition Timing (°BTDC) 9.86 0 Intake Manifold Temperature (°F) -0.691 0
Intake Manifold Temperature (°F) -2.05 0 Altitude (ft) -0.0379 0 Exhaust Oxygen (dry volume %) -116.94 0 IMP x RPM 0 0.0404 0 Exhaust Oxygen (dry volume %) -30.21 0 Exhaust Oxygen (dry volume %) -46.736 0 Ignition Timing (°BTDC) 2.009 0
Exhaust Manifold Pressure (inHG gauge) -2.79 0 Intercept 1 178 178 Ignition Timing (°BTDC) 20.45 0 Exhaust Oxygen (dry volume %) -59.2 0 Altitude (ft) -0.01159 0 -0.385 0 Exhaust Oxygen (dry volume %) -14.11 0
Engine Speed (RPM) 1.09 0 5 L5108GL BHP Multiplier Result -1.05 0 Altitude (ft) -0.0247 0 Intercept 1 289 289 Altitude (ft) -0.0104 0 Altitude (ft) -0.00531 0Ignition Timing (°BTDC) 5.14 0 Intake Manifold Pressure ("Hg) Calculated BHP 178 Engine Speed (RPM) 0.981 0 Intercept 1 -237 -237 Intercept 1 162 162 Intercept 1 81 81
Exhaust Oxygen (dry volume %) -116 0 Intake Manifold Temperature (°F) -0.957 0 Altitude (ft) -0.0117 0 Calculated BHP 289Altitude (ft) -0.0322 0 Engine Speed (RPM) 0.359 0 Intercept 1 265.3 0 Calculated BHP -277 Calculated BHP 162 Calculated BHP 81
Intercept 1 989 989 IMP x RPM 0 0.0199 0 5 L5108GSI BHP Multiplier ResultAltitude (ft) -0.0199 0 Intake Manifold Pressure (inHG gauge) 7.77 0
Calculated BHP 989 Intercept 1 106 106 Intake Manifold Temperature (°F) -0.937 0 Calculated BHP 0 5 L5108G BHP Multiplier Result 5 F18GL/GLD BHP Multiplier Result 5 F18GL BHP Multiplier Result 5 F18GSID BHP Multiplier ResultEngine Speed (RPM) 0.634 0 Compression Ratio (8.2 or 10) 14.4 0 Intake Manifold Pressure (inHG gauge) 8.754 0 Intake Manifold Pressure (inHG gauge) 7.699 0 Intake Manifold Pressure (inHG gauge) 3.983 0
Calculated BHP 106 IMP x RPM 0 0.0245 0 Intake Manifold Pressure (inHG gauge) 6.31 0 Intake Manifold Temperature (°F) -0.89 0 Intake Manifold Temperature (°F) -0.179 0 Engine Speed (RPM) 0.1344 0Exhaust Oxygen (dry volume %) -44 0 Intake Manifold Temperature (°F) 460 460 Engine Speed (RPM) 0.0909 0 Engine Speed (RPM) 0.05419 0 IMP x RPM 0.004793 0
Altitude (ft) -0.0323 0 5 F5774LT BHP Multiplier Result Engine Speed (RPM) 0.729 0 Ignition Timing (°BTDC) 3.098 0 Ignition Timing (°BTDC) 8.385 0 Intake Manifold Temperature (°F) -0.5179 06 F3521GL BHP Multiplier Result Intercept 1 147 147 Intake Manifold Pressure (inHG gauge) 24.79 0 IMP x RPM 0 0.0302 0 Exhaust Oxygen (dry volume %) -17.76 0 Exhaust Oxygen (dry volume %) -40.403 0 Ignition Timing (°BTDC) 1.507 0
Intake Manifold Pressure ("Hg) Intake Manifold Temperature (°F) -1.65 0 Exhaust Oxygen (dry volume %) -46.3 0 Altitude (ft) -0.00875 0 -0.5036 0 Exhaust Oxygen (dry volume %) -10.58 0Intake Manifold Temperature (°F) -0.0166 0 Calculated BHP 147 Exhaust Oxygen (dry volume %) -140 0 Altitude (ft) -0.0204 0 Intercept 1 218 218 Altitude (ft) -0.0077 0 Altitude (ft) -0.003983 0
Engine Speed (RPM) 0.226 0 Ignition Timing (°BTDC) 15.6 0 Intercept 1 -69.9 -69.9 Intercept 1 266 266 Intercept 1 61 61
IMP x RPM 0 0.014 0 -1.38 0 Calculated BHP 218Altitude (ft) -0.014 0 6 F3521GSI BHP Multiplier Result Engine Speed (RPM) 0.6295 0 Calculated BHP -82 Calculated BHP 266 Calculated BHP 61
Intercept 1 40.2 40.2 Intake Manifold Pressure (inHG gauge) 10.8 0 Altitude (ft) -0.0228 0Intake Manifold Temperature (°F) -0.83 0 Intercept 1 975.4 0
Calculated BHP 40 Engine Speed (RPM) 0.394 0 6 F3521G BHP Multiplier ResultIMP x RPM 0 0.0126 0 Compression Ratio (8 or 10) 0.409 0
Exhaust Oxygen (dry volume %) -26.5 0 Calculated BHP 0 Intake Manifold Pressure (inHG gauge) 9.23 07 F2895GL BHP Multiplier Result Altitude (ft) -0.0234 0 Intake Manifold Temperature (°F) 460 460
Intake Manifold Pressure ("Hg) Intercept 1 202 202 Engine Speed (RPM) 0.431 0Intake Manifold Temperature (°F) -0.123 0 IMP x RPM 0 0.0164 0
Engine Speed (RPM) 0.171 0 Calculated BHP 202 6 F3524GSI BHP Multiplier Result Exhaust Oxygen (dry volume %) -36.2 0IMP x RPM 0 0.0112 0 Intake Manifold Pressure (inHG gauge) 24.05 0 Altitude (ft) -0.015 0
Altitude (ft) -0.0112 0 Intake Manifold Temperature (°F) -0.957 0 Intercept 1 163 163Intercept 1 39.5 39.5 7 F2895GSI BHP Multiplier Result Engine Speed (RPM) 0.585 0
Intake Manifold Pressure (inHG gauge) 5.16 0 Ignition Timing (°BTDC) 6.65 0 Calculated BHP 190
Calculated BHP 40 Intake Manifold Temperature (°F) -0.74 0 -1.45 0Engine Speed (RPM) 0.398 0 Exhaust Oxygen (dry volume %) -32.68 0
IMP x RPM 0 0.0136 0 Altitude (ft) -0.024 0 7 F2895G BHP Multiplier ResultExhaust Oxygen (dry volume %) -25.8 0 Intercept 1 7.088 0 Compression Ratio (8.2 or 10) 5.24 0
Altitude (ft) -0.0187 0 Intake Manifold Pressure (inHG gauge) 4.24 0Intercept 1 82.4 82.4 Intake Manifold Temperature (°F) 460 460
Calculated BHP 0 Engine Speed (RPM) 0.41 0Calculated BHP 82 IMP x RPM 0 0.0166 0
Exhaust Oxygen (dry volume %) -25.3 0Altitude (ft) -0.012 0
Intercept 1 10.7 10.7
Calculated BHP 12
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
Waukesha Knock IndexTM (WKITM)
BHP
Page 44
VHP-GLBHP Multiplier Result
Intake Manifold Pressure (inHg gauge) 22.49 0Intake Manifold Temperature (°F) -1.27 0
Exhaust Manifold Pressure (inHg gauge) 4.49 0Exhaust Oxygen (dry volume %) -173 0
Ignition Timing (°BTDC) 14.6 0Waukesha Knock Index (WKI) -0.312 0
Engine Speed (RPM) 0.342 0Altitude (ft) -0.027 0
Intercept 1 1735 1735