[Z06] hp question?
Thread Starter
Racer
Joined: Mar 2006
Posts: 333
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From: NJ 448rwhp done by tommy @angermanagement nj
St. Jude Donor '10
hp question?
hey just got my car dynoed and it put 448@ the wheels so what i was trying to do the math for drivetrain loss but i cant figure it out. does any one know the math so i can figure what its makeing at the crank???
any help is appreciated!
any help is appreciated!
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
For std tranny the drivetrain loss is about a 12 to 14%. Call it 14% for the example.
RWHP = Crank HP x (1 - 0.14) = Crank HP x 0.86.
So Crank HP = RWHP/0.86.
448/0.86 = 521 crank HP.
Was your 448 RWHP SAE corrected? What's your mods?
RWHP = Crank HP x (1 - 0.14) = Crank HP x 0.86.
So Crank HP = RWHP/0.86.
448/0.86 = 521 crank HP.
Was your 448 RWHP SAE corrected? What's your mods?
Thread Starter
Racer
Joined: Mar 2006
Posts: 333
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From: NJ 448rwhp done by tommy @angermanagement nj
St. Jude Donor '10
tommy @ angermanagement just tuned it and he told me it was 448rwhp weather corrected.. my mods are hurricane intk,1 7/8 longtubes, corsa mufflers, underdrive pully, HPE S cam kit,plugs and wires, injectors, and a tune. im getting the car back tomorrow.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
"Weather corrected" means it is SAE HP which is what should always be looked at. Your getting about 100 more RWHP with some minor mods ... pretty impressive.
Thread Starter
Racer
Joined: Mar 2006
Posts: 333
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From: NJ 448rwhp done by tommy @angermanagement nj
St. Jude Donor '10
Melting Slicks
Joined: Dec 2006
Posts: 2,186
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From: Woodinville WA
C6Z's typically put around 450hp to the wheels and they are underrated at 505hp. And HP figures can be skewed and rated several different ways. If you want to compare your car to factory ratings you can say yours has around 500 at the crank. But if you want to impress someone you can also honestly say it's probably got around 520
