dtuna42

Here's a couple of calculations that might be of interest:

For everyone who did a track run, you can estimate your horsepower from your trap speed in the 1/4 mile:

HP = (mph/234)3 (that's to the 3rd power) x curb weight in lbs

Of course it's only an estimate, because gears/transmissions, etc. can have a small effect on the numbers. You can calculate from ET also, but ET's fluctuate due to traction and launch technique. Trap speeds fluctuate much less, so it's a better calulation.


The real way to measure HP is a calculation based on measured torque per rpm. That's what a dyno does. It measures the torque at the wheels (or flywheel on an engine dyno) and then calculates for HP:

HP = torque x rpm / 5252

You can probably find more by doing a Google search for horsepower calculators.