09-30-2013, 08:50 AM
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#12 (permalink)
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A True Z Fanatic
Join Date: Nov 2011
Location: Houston
Posts: 12,265
Drives: 2011 370ztt
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Quote:
Originally Posted by Cmike2780
Only way to really tell is with a before and after dyno pull. Most people have seen gains without a tune though. I'd personally hold on any under drive pulley upgrade. Marginal gains (+/-5 hp) with a reasonable amount of risk involved to the motor. Plenty of argument from both sides, but why take a chance for a 5 hp or less when combined with other mods.
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If you really want to lose rotational mass on the motor, do a lighter flywheel when you do a clutch or the CSC craps out.
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