I will let you know as soon as I finish my SP63 install. When I was BPU, I don't believe I saw anything greater than the high 60% range. I did see 87% on my MAF. My car made 438rwhp and I'm sure it was making more than that on the street when it was 40 degrees and I was running 20psi.
Only happened a couple of times until I realized the boost from the previous owner was that high when it would get cold outside.
Later, Steve
Later, Steve