Procharger Pulley Sizes = what boost?

[flowgoode]

96 cobra w/ stock heads/cams/intake/TB/exhaust manifolds/off-road x and flows.

built block at 9:1 compression.

p1sc, AFM powerpipe, 3.4 6rib pulley = 13 psi @ 6800rpm

my .02

 

[SYMach1]

Yeah everyone car is diff, My d1 setup on a 4.00 pulley with a powerpipe and stock manifolds and o/r xpipe saw 11psi with a 9.1CR,now with a 3.5RR pulley it reads about 15psi in the summer. I think the d1 sees about 3-4psi on the same pulley setup as a p1 does

 

[Cobra96SVT]

The reason for the way different boost numbers for the pulleys is because I believe procharger had two different impellers when you bought the kit. The Higher boost kit had a different impeller to hit around 10lbs i believe with a 3.9-4.0 pulley and the lower boost kit had an impeller that would hit around 6-8 lbs with that same pulley.

Don't quote me on any of this but I'm pretty sure thats the reason for the huge difference in boost numbers. And I believe this was for the P-1SC, It may be the same for the D-1SC too since I believe you could have upgraded to that headunit with the kit.