
12-12-2009, 09:49 AM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, ERA 289 roadster hybrid, mystery Ford powered 2dr convertible
Posts: 12,784
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Not Ranked
As others have already pointed out, on average, you can expect a 18-22% loss between flywheel HP ratings and HP ratings at the rear wheels. You can get those numbers down below 15% if you are willing to do a lot of extra work to your driveline. Headers/exhaust/tune......Everything from the types of fluids in your motor, transmission, and rear end to which bearings you have, how tight the tolerances are in your transmission/rear end just to name a few. I've watched some of the circle track guys spend days on chassis dyno's to wring out that extra 5-12hp as an advantage over their competition......
Bill S.;
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