Hi guys, I have a sidemount mp112 on my truck, Right now I have the 3.3 pulley which should make around 7.5-8psi on a bone stock 5.3 from what i read. Mine in 80* weather makes 6.5 maybe 6.75, when its 55* outside it will go over 7 psi. I only have a ls1 cam and magnaflow cat back which I dont think would cost much loss. maybe .25 from the slightly larger cam. Only other thing I can think of is that my rotors are completely stripped of there coating. I've read lightning guys have seen up to 2lb gains from stripped rotors to the cobra rotors due to tighter tolerances. I believe they run more boost then I do as well. I'm hoping it could be the reason i'm down a bit.. I'd hope coated i'd see 1psi diff i'd be happy.. also would not having an intercooler cause lower #'s then what the top mount systems see? I run at about 30-40* over ambient just cruising, and closer to 120* over ambient wot.

Any thoughts or comments are appreciated.