I'm seriously considering staying with my original 5.11" crank pulley, and just getting a 2.87" supercharged pulley which I'll get coated so it won't slip. I'm worried that at 51,278rpm impeller speed, I might make over 11psi of boost, and push the stock engine too far even after a re-tune
plus, the max impeller speed on a vortech v3si is 52k RPM, and ESS used 16psi to get to 600rwhp on a low compression engine. Which is what is scary to me, considering that I'd be near max impeller speed on stock internals
Also, I realized that going catless in section one DECREASED my peak boost. After some research, it appears that the more efficient your engine is at breathing, the less boost you'll read on your gauge because your engine will be using that up, versus being backed up in the gauge. If that makes sense..
http://www.928motorsports.com/servic...tingpulley.php