Something in the tune is limiting the boost to only 4 lbs. What is it?
The story.
I have a 2000 GTP that went down for a build up. L26 w/ 9.6.5:1 compression, XP cam, 105's, Dbl rlr, P&P Gen V, P&P heads, P&P LIM, headers, exhaust, all the crap. you know. I previously had a DHP 1.0 PCM and...