malchevy72

does anyone know what kind of PSI i will be seeing with a 5.25 pulley? it a stock LS1 with the F1 blower.

EPP

iTrader: (22)

There are many variables that make up the boost your engine will see. Cubic inch, camshaft profile, cylinder heads, headers, size of tubes on headers, exhaust, elevation, rpm limit of engine, etc.
You mention that it is stock, but do you have headers and a cat back? Bob

malchevy72

i do have a catback system and thats it.

WHPLASH

iTrader: (22)

I'd uprgrade your whole car before even thinking of an F-1. A F-1 is overkill at this point. I don't think anyone runs that large of pulley.