Drag Performance Calculator
Please fill in items in the left column and click "Calculate Performance".

Vehicle Weight (in pounds*):
Vehicle Horsepower:
RPM through lights (finish line):
Tire Diameter (Height) in Inches:
1/4 Mile ET:
1/4 Mile Top End Speed:
Ideal 1/4 Mile Gear Ratio:
1/8 Mile ET:

*Australians may need to click HERE to convert your cars weight from KILOS to POUNDS (Use POUNDS (AVOIR) )

You might also want to convert Kph to Mph HERE, but any time slip from the track should already have Mph.

 

Pushing the button below will find the nearest available diff centre for your car and tell you the Richmond part number to order it with. How convenient :)

Find part numbers within of this ratio: