It seemed to be right where it should have been up to about 27psi compared to other engines weve dynoed with more similar "stuff" but where it really should have taken off it laid over. I hope this was a problem that happened before the best pulls were made. The hot side of the turbo is about 300whp from being a problem. Once we get a compressor/cover combo on there that can match it it will be interesting. The cam that was in there wasnt working those springs hard at all.Wow, this could be the reason your down on power a bit at the higher boost levels?