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Old 06-05-2013, 08:53 PM   #1
Jer4251
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Drives: 2013 ZL1, 2008 TBSS, 1990 IROC-Z
Join Date: Sep 2009
Location: Georgia
Posts: 1,199
Any dyno results for pulley only swaps?

I want to bring my ZL1 convertible power to weight ratio into spec with the coupe if not higher. Looking at things I can do to get a decent gain without a ton of money. I've been wanting a rotofab, 2" longtubes with no cats, and a 2.5" upper pulley. along with a tune I know I will be well above the stock coupe, but what can I expect power wise if I do just the upper pulley to start?

has anyone got results on only the pulley swap?

How much hp will each lb of boost generally result in on the ZL1?
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2013 ZL1 Vert
1990 IROC-Z Vert
2014 Sierra Denali
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