I've got a 2000 GTP with an L26 block, NIC cam, 105# ZZP springs, Open Cone, Street tuned (a little on the rich side), AL 103s, 3.5" MPS, SD headers, ZZP flex, Magnaflow high flow cat, Res Delete, and leads into stock mufflers in the back. I get right around 8psi, at the max 9, and I was told by somebody (not to mention names) that 8-9psi is too much on a setup like mine and that i might have flowing issues in the motor. I also had an open cutout right before the cat, but it broke so I just put a block off plate on the flange. I took the plate off and ran the car on a dump basically to see if the problem was the exhaust. After letting the car warm up and doing a few pulls I saw that boost dropped down to 7psi at the most. I also have an aeroforce and see no knock all the way through 2nd gear. (Highest I've ever seen, which was once, was .3* of knock) I just wanted to get some other peoples insight on the possibility of a problem somewhere, not saying that the person who told me was wrong, just curious as to some other things I could possibly try? Thanks for anybody with advice!
Originally Posted by matt5112
