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Old 03-21-2002, 09:42 PM   #1
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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?
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Old 03-21-2002, 10:29 PM   #2
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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
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Old 03-22-2002, 06:55 AM   #3
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Originally posted by AzCivic
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. I was like I wish......
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Old 03-22-2002, 09:36 AM   #4
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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.
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Old 03-22-2002, 10:03 AM   #5
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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......
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Old 03-22-2002, 10:04 AM   #6
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So does anyone know the actual equation to calculate the HP from the ET or MPH?
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Old 03-22-2002, 01:05 PM   #7
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Quote:
Originally posted by AzCivic
How do you make that qoute thing in your response, I

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.
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Old 03-22-2002, 02:14 PM   #8
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Originally posted by 94_AcCoRd_EX


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...
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Old 03-22-2002, 02:45 PM   #9
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Originally posted by Civic_Addict


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.
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Old 03-22-2002, 03:24 PM   #10
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Originally posted by Civic_Addict
So does anyone know the actual equation to calculate the HP from the ET or MPH?

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.
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Old 03-25-2002, 09:58 AM   #11
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Quote:
Originally posted by Mushroom


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
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Old 03-25-2002, 12:28 PM   #12
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Originally posted by hondaman-iac


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.
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Old 03-25-2002, 12:56 PM   #13
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sorry i tough that that was the formula at any speeds. and 421 hp *drools* i'll keep on dreaming
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