RWHP vs Engine output??
08-05-02, 11:26 PM
#1
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RWHP vs Engine output??
I've just dyno my fd and the Maxpower is 308RWHP, and Maxtorque: 276...How much engine horse power is my car pushing!!
Thank YOu all.
Thank YOu all.
Good #'s. Sounds like you have all the bolt ons and a stock cat..
08-05-02, 11:40 PM
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Originally posted by Batmobile
ooops....Its about at 12lbs...how would one calculate it...thanks a lot guys for responding!!
ooops....Its about at 12lbs...how would one calculate it...thanks a lot guys for responding!!
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08-05-02, 11:43 PM
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That is wrong. The 15% number works for going the other way. You multiply flywheel hp x.85 (15%) to get rwhp from crank #'s. To get crank from rwhp you muliply 1.175.
Last edited by Mr rx-7 tt; 08-05-02 at 11:47 PM.
08-06-02, 10:34 AM
#11
Ex fd *****
I doubt the FD drivetrain realy eats 15%, I would its think more likley down in the 10<>12% range if not lower.
At 10% the #s work out to:
342 fwhp, & 306 Ft/lbs Tq.
At 10% the #s work out to:
342 fwhp, & 306 Ft/lbs Tq.
08-06-02, 11:43 AM
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the FD drivetrain will lose anywhere from 15-20% of its power before it gets to the wheels. this value is common for all front engine, rear wheel drive cars. 17% is typically a good value to calculate from. you can expect to see a 10-15% loss with a rear engine vehicle only.
08-06-02, 12:29 PM
#14
Ex fd *****
VRT + yes an auto eats more HP than a Manual
1bad7 - Where did you get thoes #s? - I have read that some FWD transaxels are getting down to the 8% loss range.
That 15-20% # sounds more like a Total loss
IE: RWHP/SAE Gross, not RWHP/SAE Net (fwhp)
SAE Gross is total output excluding losses from all auxillaries like Waterpump, Fan, Alternator, Powersteering, AC, ETC.
SAE Net is output at flywheel with All auxilliaries in place and operating
1bad7 - Where did you get thoes #s? - I have read that some FWD transaxels are getting down to the 8% loss range.
That 15-20% # sounds more like a Total loss
IE: RWHP/SAE Gross, not RWHP/SAE Net (fwhp)
SAE Gross is total output excluding losses from all auxillaries like Waterpump, Fan, Alternator, Powersteering, AC, ETC.
SAE Net is output at flywheel with All auxilliaries in place and operating
Last edited by maxpesce; 08-06-02 at 12:34 PM.
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