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Yup. Going to the dyno on Monday hopefully and see where I'm at powerwise. If all looks good I'll be ordering a 3.74" (10psi) pulley like you got.
3.47 is what I run. A little dyslexia there. ;)
 
The standard pulley set that comes with the blower is much to small. I think its something like 13PSI on a otherwise stock setup.
Stock 3" pulley is 15-17 PSI with TVS overdrive damper and 13 PSI with stock GT crank damper.
 
21 - 26 of 26 Posts