Conversion factor between rwhp and crank?
Race Director
Joined: Aug 2005
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From: Hudson WI
NCM Sinkhole Donor
As the power goes up the percentage goes down. Don't laugh, but lube in the trans and diff make a difference as well. A premium synthetic such as Red Line, uses less power, thus more at the wheels.
Race Director
Joined: Dec 2006
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From: Fort Worth, Texas
Melting Slicks
Joined: Nov 2010
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From: On the east coast we drive until we die
Absolutely, you can get any engine to produce less than 100 HP. How much HP does it take to run the car down the road in low gear at 7 mph? Not very much, well less than 100. A drive train will have the same amount of friction loss no matter what the peak HP of the engine is. At a certain speed the HP loss will be the same no matter which motor is turning it. For instance take a C6 GS Vs a C6Z06 in 4th gear at 60 mph on a level road. Drive train loss in both cars will be the same.
Bill
Bill
Anyway, we're not talking just engines anyway since there is no loss on an engine dyno. We are considering the entire drivetrain. Trans, clutch, TC, gears, wheels, etc. when talking loss.
And I agree the loss is probably the same for a given drivetrain. However, I was curious on the theory of a sliding % loss.
Race Director
Joined: Mar 2005
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From: Austin Texas
If you want a fixed HP loss for a 100HP motor go to a Honda Forum.
Race Director
Joined: Aug 2005
Posts: 13,592
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From: Hudson WI
NCM Sinkhole Donor
Race Director
Joined: Mar 2005
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From: Austin Texas
Share what? Comparing factory advertized HP with Dynojet 248, SAE smoothing 5 corrected HP?
I had multiple runs on my '05 'Vette and have had a few runs with my '08 'Vette , thats my LS2/LS3 experience.
Dynos on my SRT4, my Firebird Formula and just for kicks on my '03 Dakota V6 truck.
I had multiple runs on my '05 'Vette and have had a few runs with my '08 'Vette , thats my LS2/LS3 experience.
Dynos on my SRT4, my Firebird Formula and just for kicks on my '03 Dakota V6 truck.
