[CallMeCrazy]

Again, not necessarily. The pressure being put in isnt as important as the volume of air being put in at that given pressure. You need to specify which turbo and which volume (how much CFM at given psi) when you're discussing which psi. If you have a turbo that doesnt flow enough volume no matter what psi you're run it at, you don't have much to worry about when it comes to pistons melting, cracking or rods bending. I'll give you this example using the stock MX6 2.2L F2T engine and the stock RHB5 VJ11 turbocharger. The max CFM that this engine is capable of at redline (6,000 rpm) is 235 CFM and that is at 100% VE. The turbo itself is barely capable of 200-250CFM per the flow map. The stock boost on this turbo is 8.7 psi but even if you raise the boost to 20 psi (max) it still isnt enough flow to reduce the AFR from rich to lean. Even at 20 psi the AFR is still pig rich in the 11's. Bottom line, if your turbo is sized accordingly, you don't have nearly as much to worry about. The GM series that he is looking at is sized accordingly for this engine, psi, engine CID, RPM, and target power output. You cannot say ___ psi will ruin the engine when you don't which turbo. Generically saying ___ psi, or "Stay under ___ pis and you'll be okay" doesnt work if you don't mention volume at that specified PSI.

I will say this, most engines can handle at least half an atmosphere (6-8 psi) which is a good start regardless of which turbo it is. I will agree with you there, but the rest no. We're kind of on the same page.

EDIT: PS- I don't come here often, WTF is Casino cash? lol