Outlaw Performance
(504)-415-8959
FAQ Search Memberlist Usergroups Register
Profile Log in to check your private messages Log in
Home Forums Events Calculator Rides Contact us
Estimate Your Horsepower! (THIS IS JUST AN ESTIMATE BASED ON SIMPLE CALCULATIONS!)
Calculate HP from Trap Speed
Vehicle weight in pounds (including driver) lbs
Trap speed at end of 1/4 mi in m.p.h. m.p.h.
You are making : HP at the rear wheels and HP at the flywheel*. JavaScript must be enabled in your browser for the calculation to work.
*Note: Assuming a 18% drive train loss.
Calculate HP from ET
ET in seconds sec
Note: Assuming a 18% drive train loss
Calculate mph for RPM range
Tire diameter
Gear Ratio
This calculation assumes the car's transmission is in drive or 1:1 ratio, no overdrive. For Overdrive cars mutliply the overdrive ratio times the rear and gear ratio. Example a 700R4 transmission has an overdive ratio 0.7:1. For a 4.11 rear end multiply 4.11 x 0.7 = 2.877. Enter 2.877 as the number for the gear ratio to calculate speeds in overdive. JavaScript must be enabled in your browser for the calculation to work.
1000 rpm
mph
4500 rpm
1500 rpm
5000 rpm
2000 rpm
5500 rpm
2500 rpm
6000 rpm
3000 rpm
6500 rpm
3500 rpm
7000 rpm
4000 rpm
7500 rpm
Calculate Rear End Gear Ratio
Enter the tire diameter in inches, rpm's of the motor at a certain speed as indicated by your speedometer in mph. This calculation assumes the car's transmission is in drive or 1:1 ratio, no overdrive.
Tire Diameter (in)
RPM
Speed at RPM (mph)
Rear End Gear Ratio JavaScript must be enabled in your browser for the calculation to work.
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log
in to check your private messages
Log
in