- Aug 15, 2014
- Reaction score
This spring when I broke a piston in my motor I went ahead and ordered a MMR longblock with tfs heads and stage three blower cams.I added the other supporting mods bigger injectors, return fuel system, eight rib upgrade on my p-1sc, 10 percent overdrive crank pulley after some belt slip, thump racing tensioner. My tuner called today and said that my new motor only made 413 hp with 14.5 lbs of boost and my old setup ran 390 hp with 13 lbs of boost thru a auto trans. He really didn't have any answers for why it doesn't make anymore power but is concerned about the cams being improperly degreed. His other concerns were the IAT's jump from 80 to 180 on a full pull, he doesn't like my pro products intake manifold due to heat soak and prefers a stock one. Anyone have any thoughts on whats going on.