The Correct Way To Convert RWHP/AWHP to FWHP
10-22-2006, 10:21 AM
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The Correct Way To Convert RWHP/AWHP to FWHP
Well, there was thread on the other site and my dear friends accused me of being a high school dropout.... actually it was quite funny.The reason I ask is because I was the first in my family to graduate from elementary school... and I feel insulted 
I digress. My math is fine but I have a difference of opinion with my other forum friends about the proper application of the math in question. The car had 518 RWHP. We agreed on a 12.5% driveline loss.Are we looking for RWHP+ 12.5% loss OR FWHP minus the 12.5% loss. I say the latter but didnt feel like arguing the point. My equation was 518/(1-12.5%) or 518/.875=592FWHP. His math was 518X 1.125=582FWHP. Now I am not an engineer so I do not know which is correct- he quoted from EVO's website that his method is correct. I have my dyno day tomorrow, so I would like to know the correct method since I would prefer to have the most inflated numbers possible so Jean and TB have something to complain about. Kevin
I digress. My math is fine but I have a difference of opinion with my other forum friends about the proper application of the math in question. The car had 518 RWHP. We agreed on a 12.5% driveline loss.Are we looking for RWHP+ 12.5% loss OR FWHP minus the 12.5% loss. I say the latter but didnt feel like arguing the point. My equation was 518/(1-12.5%) or 518/.875=592FWHP. His math was 518X 1.125=582FWHP. Now I am not an engineer so I do not know which is correct- he quoted from EVO's website that his method is correct. I have my dyno day tomorrow, so I would like to know the correct method since I would prefer to have the most inflated numbers possible so Jean and TB have something to complain about. Kevin
10-22-2006, 10:52 AM
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Good luck,
and although math is my strong suit, lets look at the numbers the dyno gives you.
Are you now running 2wD? or just unhooking the fronts for dyno purposes only?
cheers for all your info sharing!
MK
and although math is my strong suit, lets look at the numbers the dyno gives you.
Are you now running 2wD? or just unhooking the fronts for dyno purposes only?
cheers for all your info sharing!
MK
10-22-2006, 10:57 AM
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Originally Posted by Woodster
Good luck,
and although math is my strong suit, lets look at the numbers the dyno gives you.
Are you now running 2wD? or just unhooking the fronts for dyno purposes only?
cheers for all your info sharing!
MK
and although math is my strong suit, lets look at the numbers the dyno gives you.
Are you now running 2wD? or just unhooking the fronts for dyno purposes only?
cheers for all your info sharing!
MK
10-22-2006, 11:10 AM
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Originally Posted by wross996tt
My understanding is to divide RWHP by .875 (for a 12.5% loss) to get FWHP, but what the heck do I know....I'm a statistician.
I was hoping you would chime in. It all comes down to whether you want FWHP -driveline loss or RWHP+ driveline loss. Whatever. Kevin
10-22-2006, 11:13 AM
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10-22-2006, 12:29 PM
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Originally Posted by Jean
Kevin, why are you sweating it. Regardless what you get on those dynos it will be wrong. .
What is the correct way... because I really do not know. My logic tells me I am looking for FWHP-driveline loss, but who knows. Kevin
10-22-2006, 12:31 PM
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Jean, look on the bright side... at least I will have a good idea of the differential between AWD and RWD on the same car , same dyno , same day. AWD and RWD tomorrow. Kevin
10-22-2006, 12:41 PM
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Originally Posted by Jean
The way I interpret that article is that I will have 750+Hp at the crank...he he he! Kevin
