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Old 06-05-2013, 07:53 PM   #1
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Join Date: Sep 2009
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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?
2013 ZL1 Vert
1990 IROC-Z Vert
1996 SS Vert #1468
1991 Z28
2014 Sierra Denali
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