OK ive had the cobra for 2 weeks now almost 3, im going to go down to get it tuned in about another 2 weeks, the car has all the supporting mods for the kb 2.2 and is capable of maxing the supercharger out but thats not what im looking for, im wanting to run 17-19 psi safely and still have street drivability the car is tuned for 15 psi right now the next smaller pulley will add 2 lbs and the one below that will add 4, i wanted 18 but since there is no way with my pulley arrangement i have to achieve 18 i need to decide which way to go safely

 

well if you go with the 19psi pulley your intercooler will bring it down by 1-2psi so 17-18 will be what's actually going into the engine

 

yes but i also forgot to mention i have a mophis power pipe with accufab Big bore TB, ive heard claims of 1-2 psi increase from these as well so it would equal it self out

 

You could use a 3.5" upper and 6lb lower to achieve 17-19psi depending on your exhaust setup. Whats your current pulley setup?

 

as of right now im running a 3.5 pulley with stock crank pulley @ 15 psi, i have a 3" wich will net me 17 and a 2.75 which would give me 19, i also have the metco 6 lb lower crank sitting on my shelf but id rather just swap the blower pulley and belts around for ease and time

 

you need a lower.

 

thanks for the reply but...i dont need a lower, a stock crank pulley and a 2.75 with a Kb 2.2 will net~ 19psi and the 3" is about 17 psi