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From a 3.7 to a 3.4 Pulley how much more boost

Old 04-05-2014, 10:50 PM
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Default From a 3.7 to a 3.4 Pulley how much more boost

Thinking about turning it up, D1-sc with asters auto spring tentioner set up running a 3.7 now and making 15 psi at around 6,000-6,300 rpm

740rwhp

looking to swap out the 3.7 for a 3.4 and make some more power , any idea about how much more boost she would blow with the smaller 3.4 pulley?
Old 04-06-2014, 07:27 AM
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I would buy a bigger crank pulley to help with belt slip and get you a couple more psi

http://www.cbrperformanceproducts.co...rib8.65ply.htm
Old 04-06-2014, 07:30 AM
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Originally Posted by LS2Ttype
Thinking about turning it up, D1-sc with asters auto spring tentioner set up running a 3.7 now and making 15 psi at around 6,000-6,300 rpm

740rwhp

looking to swap out the 3.7 for a 3.4 and make some more power , any idea about how much more boost she would blow with the smaller 3.4 pulley?
Every .1 is about a 1-1.5 lbs of boost so roughly 3 lbs ish. Is my guess.
Old 04-07-2014, 09:47 PM
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Nice!! 18 PSI would do the trick, Any idea how much more power i would make with 3 psi


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