07-08-2011, 11:14 PM
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#1 (permalink)
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Enthusiast Member
Join Date: Jul 2009
Location: Boulder, CO
Posts: 272
Drives: 09 370z, 07 R6
Rep Power: 16
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Quote:
Originally Posted by Pelican170
If the GTM S/C claims 550 hp, wouldnt that add up to more than 400 whp on the car? just curious but I thought the conversion was roughly 15% from fly to wheels....
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You are correct that drivetrain loss is somewhere between 15% - 17% on a manual transmission Z. The big part you are missing is the torque difference between a tt and sc Z. The hp numbers are similar but the sc makes power higher up in the rev range. TT makes power in the middle of the power band and makes more torque.
HP = (Torque x RPM) / 5252
In general torque is king in a drag race. HP comes in to play at top speeds. In short if both a tt Z and a sc Z have 550hp, the tt Z will have more torque and be faster in a straight line. The benefit to me of the sc is that the power curve resembles that of a stock Z and retains driveablity on a road coarse.
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Thanks for the sig EazyD.
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