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Gas= 6.01lb (Gasoline weight pounds for US gallons)
MPH.
This program is designed to calculate the actual vehicle speed in MPH using a 1:1 transmission
ratio. The calculations are based on the tire circumference, the engine RPM, and the final gear
ratio. This program assumes no wheel spin and no clutch slippage.
Press CIR.TRK. FORMULAS, then Gearing/Tires, then select MPH Calc to start this program.
Display Example:
=== MPH Calc ===
RPM? 7250 (Engine RPM)
GearRtio? 5.13 (Final drive gear ratio)
TireCirc? 89.00 (Tire circumference inches - not diameter)
MPH= 118.84 (Calculated MPH)
Compression Ratio, Values Known.
This program computes the true compression ratio of an engine. All important factors are
considered including bore, stroke, boost pressure, deck height, gasket bore, gasket thickness,
combustion chamber volume, and effective piston dome volume.
Press ALT, ENGINE FORMULAS, then C/R Menu, then Calc Ratio to start this program.
Display Example:
== Comp Ratio ==
Bore? 4.250 (Enter cylinder bore diameter inches)
Stroke? 3.750 (Enter crankshaft stroke inches)
Boost? 0.000 (Enter max manifold pressure PSI gage)
Deck Hgt? 0.020 (Enter TDC piston to block deck clearance inches -
use negative number for piston above deck -0.020)
Gskt Vol? 0.000 (Enter head gasket volume CC, enter 0 if not known)
Calc Gskt Vol: (Press ENTER to continue)
…Bore? 4.275 (Enter head gasket bore diameter inches)
…Thck? 0.080 (Enter head gasket thickness inches)
…Vol= 18.80 (Calculated head gasket volume cubic centimeters)
Chamb Vol? 77.00 (Enter head combustion chamber volume CC)
Dome Vol? 8.30 (Enter piston dome popup volume CC)
Ratio= 10.46 :1 (Calculated engine compression ratio)
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