CAMARO6 - View Single Post - Help with procharger pulley size and question on lowside

oldman · 10-11-2018, 08:16 AM

There is no one size shim fits, you have to measure and grind. Mine came out to something sub .40. I think the .060 shimm is just a LS7 valve lash cap, anyway if I had that to start, it would have taken a whole lot less grinding.

I surprised you are making that much boost with the 4.5 pulley and stock engine. I show (we have about the same build) 4.0 pulley and a P1sc 6.5+ PSI, with a 4.5 pulley and a D1X 6.5+ PSI, just touching 7 PSI on the shift.

The stage II cam had an impressive top end, is the redline 7400?

10-11-2018, 08:16 AM	#4
oldman Drives: SS 6 speed of course Join Date: Jan 2016 Location: Hilo, HI Posts: 4,346	There is no one size shim fits, you have to measure and grind. Mine came out to something sub .40. I think the .060 shimm is just a LS7 valve lash cap, anyway if I had that to start, it would have taken a whole lot less grinding. I surprised you are making that much boost with the 4.5 pulley and stock engine. I show (we have about the same build) 4.0 pulley and a P1sc 6.5+ PSI, with a 4.5 pulley and a D1X 6.5+ PSI, just touching 7 PSI on the shift. The stage II cam had an impressive top end, is the redline 7400? __________________ Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.