[cjperformance]

I think it depends on how much E you run too... and maybe the type of blower you use. I would NEVER try to do 11.5 psi on 93 octane, but so far 11.5 psi PEAK on a centri with E70+ seems "fine".

My rationale for going as high as 11.5 psi with a centri is that it only hits 11.5 psi at the very top of the rpm range, so after shift, its back down to around 8 or 9 psi and ramps back up... so if you look at average boost, its more like 10 psi average.

Compared to how i think the PD works where it'd see a solid 11.5 psi the entire time. I dont know if that reasoning is sound, or wishful thinking... my point being... the answer to your question is.... it depends