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How to Build Max Performance Pontiac V8s. Calculate 1/8 mile ET,MPH and Ideal Gear Ratio using HP - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules!
Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches.
DRAG PERFORMANCE CALCULATOR. Vehicle Weight (in pounds) Vehicle Horsepower. RPM through lights (finish line) Tire Diameter (Hght.) in Inches. 1/4 Mile ET. 1/4 Mile Top End Speed. Ideal 1/4 Mile Gear Ratio.
This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. An 11% driveline loss is assumed for Wheel HP.
Using only your car's power and weight, it will estimate its 1/4-mile elapsed time (ET) and final speed (trap speed). With this quarter-mile ET calculator, you can: Set a target time for your drag race. See how a power upgrade to your engine affects your ET. Learn how reducing the car's weight affects its performance.
HP is at the crank. The answers below will be for at sea level and standard pressure/temperature. (no weather correction). Calculate ET and MPH from HP and Weight Using Quarter Mile Runs. Weight.
Enter the Rearend Gear Ratio, the ¼ Mile MPH, the RPM, the Transmission top gear ratio, Conv Slip% and Click on Calculate… Tire Height = (Rearend Ratio * MPH * 336.136 * Trans Ratio * Conv Slip%) / RPM
