88workcar, Don't worry that your car doesn't make 9lbs with a 9lb pulley. To me, boost is a bad thing. It creates heat and with increased heat comes loose of power. Boost is just a function of back pressure. There are lots of variables that control boost. Area of intake, cam, intake tube, air filter and RPM to name a few. Most cars don't build much boost until there is a big load on it, like top of third gear. I wouldn't compair your engine and the manufactures rated pulley. To me, you need to talk impeller rpm. Compair your impeller rpm to your engine rpm and then you can see if you are efficient or not. I have seen guys with the same pulley's make 10 lbs of boost and 18lbs of boost. Different cars, but same superchargers and pulleys. Who is going to make more power ? Thats why I don't get caught up in the numbers game that the manufactures talk about.
Few suggestions :
Check boost at top rpm going though traps
Use a dedicated vac/boost line going to your fuel regulator.
If you need ideas on timing, let me know.
__________________
old S trim combo 10.13@ 135
New YS combo = 680RWHP (no times)
|