Horsepower Calculation?
 

I've searched everywhere for an equation to figure front wheel horsepower and found nothing. I've found a TON of rear wheel calculators. Does anyone know the equation to figure a vehicles HP based on ET, trap speeds, etc? I will make my own frickin' calculator.

Any ideas on where to look for the equation?

I'm sure its pretty much the same as rwd cars except our loss of power through the drivetrain is about 5-10% less. Try http://www.smokemup.com/utilities/calc/hp_et.cfm

THANK YOU!!!!!!!

Finally one that works! The ones for the RWD kept tellin me I had 135HP at the wheels & 185 at the flywheel.:eek: I was like I wish......

You're welcome, I'm glad it worked for ya.
I have a question though, How do you make that qoute thing in your response, I see everyone doing it and i can't figure it out.

Goto User CP ----> Edit Profile

Its the "Stuff" section......

So does anyone know the actual equation to calculate the HP from the ET or MPH?

Like this?

Look at the bottom right hand side of the post you want to quote and click the quote button. They you can edit it to look how you want it.

Perhaps this was what he meant.... I thought he meant the quotes under the names...

Yeah the copying quotes thing was what i was talking about.
Thanks.

This are pretty rough, but how about:
HP = ((MPH/235) ^ 3 ) * Weight (lbs)

This from HP = 550 ft*lb/s, 1/4 mi distance, no tire slippage or air resistance. The cube comes from deriving acceleration -> distance.

ummm i tried to do that and on my car @117mph (the top) ands i should get 431 hp and an accord engine will do that only in it's dreams

The MPH in the equation should be your speed at the end of the 1/4 mile (is this what's called the "trap speed"?). I agree, 431 hp would be pretty nice for an accord, but so would a 1/4 mi @ 117 mph. I think doing a HP calculation based on max speed would require knowing the car's frontal area, altitude, etc.

sorry i tough that that was the formula at any speeds. and 421 hp *drools* i'll keep on dreaming :rolleyes: