Wisconsin Street Dominators

Performance Calculators

RPM calculator

Gear Ratio	Tire Radius	MPH

	RPM =

CFM needed

Engine size (cid)	Max RPM	Volumetric Efficiency *

	CFM Needed =

* 1.0 is a good estimate for a mild performance engine

Horsepower From MPH Calculation:

1/4 Mile Speed (mph)	Vehicle Weight (lbs.)		Horsepower

Liter/CID Conversions:

Liters

Cubic Inches

Displacement Calculation:

Bore

Stroke

# of Cylinders

CID=

Miles per Gallon:

Miles
Travelled

Gallons
Used

Miles Per Gallon

Kilometers per Liter:

Kilometers
Travelled

Liters
Used

Kms Per Liter

Compression Ratio Calculator

Enter Input Unit Type 1=inches 2=mm :
Enter Bore size:
Enter Stroke size:
Enter Head Gasket Bore size: 4.100 is standard small block
Enter Compressed Head Gasket Thickness: .040 is common
Enter Combustion Chamber Volume in CC's: add volume above top piston ring to this number
Enter Piston Dome Volume in CC's use "-" for Dished Pistons:
Enter Piston Deck Clearance If ABOVE deck use "-" :

Compression Ratio: :1 Total Volume: cc

1/4 Mile to 1/8 Mile ET Conversion
Enter your 1/8 Mile ET or 1/4 Mile ET

Enter your 1/8 ET:

Your 1/4 Mile ET is:

Enter your 1/4 ET:

Your 1/8 Mile ET is:

Enter the ¼ Mile ET or the 1/8 Mile ET and
Click on Calculate...

FORMULA:
¼ Mile ET = (1/8 Mile ET + .22) / .655
1/8 Mile ET = (¼ Mile ET * .655) - .22

Injector Flow Rate (lb/hr) =

Engine HP(1) x BSFC(2)
Number of Injectors x Injector duty cycle(3)

Injector Flow Rate (cc/min) =

Engine HP(1) x BSFC(2) x 10.5
Number of Injectors x Injector duty cycle(3)

Fuel injectors max HP (lb/hr)* =

Injector flow rate x Number of injectors x 0.8
BSFC

Fuel injectors max HP (cc/min)* =

Injector flow rate x Number of injectors x 0.8
BSFC x 10.5

Injector flow rate conversions:

Fuel injectors flow (lb/hr)* =

Fuel injector flow (cc/min)
10.5

Fuel injector flow (cc/min)* =

Fuel injectors flow (lb/hr) x 10.5

Conversion Chart

Cubic Inches (ci)				Liters (L)

Cubic Inches (ci)				Cubic Centimeters (cc)

Inches (in)				Centimeters (cm)

Foot Pounds (ft-lbs)				Inch Pounds (in-lbs)

Miles (mi)				Kilometers (km)

Ounces (oz)				Grams (g)

Miles per Hour (mph)				Kilometers per Hour (kph)

Degrees Fahrenheit (F)				Degrees Celcius (C)

All times are GMT -5. The time now is 04:05 AM.

RPM calculator

CFM needed

Horsepower From MPH Calculation:

Liter/CID Conversions:

Displacement Calculation:

Miles per Gallon:

Kilometers per Liter:

Compression Ratio Calculator

Estimate MPH from 60 foot time