Redline. If the kit is a 7 lb and your redline is say 6,000 then you would only see 1.75 at 3,000 rpms. At twice the rpms it would be 4 times the boost. Twice the rpm then 4 times the boost. Not as powerful as turbo but no lag at all. The turbo would however pull on centif. And plus one on the belt slip problem. I hate that about blowers, but with the right setup= no problems.y2k2gt said:So, when do you have full boost with a Centri?????