People need to get out of this thinking that pulley "x" will make "9 psi" mentality.

Adam didn't have any experience with blowers before this car, and it was his first V8 powered car ever and he bought it from me already built. So, it's understandable that he is going to use terms like "11psi pulley". What he MEANT to say was that it was making 11psi at peak boost when I sold it to him....not that it had "11psi pulleys" on it. That is where the confusion started. He never changed the pulleys on it. It had the 6.66" crank and 3.33" blower pulley combination. 11psi is 11psi no matter what pulleys are on the car. The car would only make 8psi with these pulleys if the engine had a larger cam and a good set of ported heads.

Boost is just a measure of pressure. Heads, cam, cubic inches, etc.. are all variables to how much "boost" the engine is going to see. The reason my car saw such a high boost number with that pulley combination is because it was a small cubic inch combo (350ci), small cam, and stock unported heads.

The car actually made 9psi with those pulleys using the Vortech dryer hose junk on the blower inlet. I fabricated a 3.5" solid intake with a large 4" K&N conical filter and it gained 2psi and the boost measurement was continually gaining (like it should) instead of staying at 9psi from 6000-6300 rpms.

After trying different shiftpoints at the track, it consistantly ran the fastest mph in the 1/4 when shifting at 6400 rpms. Every car is different. He ended up getting the car to run what it should after more seat time at the track with no other changes.

Jason