Here is my concern with boost... I always thought 9 or 10 psi was max for M90 efficiency. I have a genV bolted on.

But right now I am pushing ~12.2PSI and it's taking it fine. I think I can easily drop to a 2.8" and probably a 2.7".
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But is 14PSI too much!? I want to know how much PSI you experienced guys are pushing. I am not trying to blow my engine up over 1 PSI.

I am sure I can push 14 or maybe even 15PSI but what is too much? Is that ok? 16PSI!? This is my concern. Hope you understand.