Crank horsepower
Is there any way to approximate crank horsepower without having your engine on an engine dyno? Is there a certain percentage lost through the drivetrain, and other parts that is a "standard" to calculating crank horsepower? Just something I was thinking about. I see alot of people giving their dyno numbers and at times will give an estimate of crank HP too. I just want to know how they estimate that figure.
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Re: Crank horsepower
isnt it a 15% drivetrain loss?/?
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Re: Crank horsepower
whp readout of a dynojet is about a 15% loss.
118 whp * 1.15 = 135.7 hp |
Re: Crank horsepower
i crank mad hps in my pants yo...
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Re: Crank horsepower
Really josh? I don't want to know where the torque comes from :P Thanks for the info Mista Bone, that's about what I figured it would be. About a 15% loss.
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Re: Crank horsepower
15% is standard but not applicable on all vehicles. loss of a standard transaxle vs auto rear wheel drive? Yeah different.
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Re: Crank horsepower
Yup, your right Dave. Say, an all wheel drive vehichle would be a bit more I would think.
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Re: Crank horsepower
yeah bout 22 percent.... fucka wrx
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Re: Crank horsepower
Originally Posted by hotrex
yeah bout 22 percent.... fucka wrx
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Re: Crank horsepower
fwd manual cars can get as low as 12% drivetrain loss, auto trannies can ben arond 15-18% on the VERY low side.
Many awd cars can be as high as 35% drivetrain loss. Thus explaining why a wrx cant beat a 150 fwhp car on the freeway if that car makes torque. |
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