Quote Originally Posted by tony
heres his post about it on 350zmotoring.com
Quote
"From previous tuning sessions, and tuning Gman's car, the VQ with a free flowing exhuast can make about 550whp on pump gas at 12-13psi of boost pressure with a good safe tune."

So judging by this, i guessing 12-13 is the treshhold on stock compression and internals.

And the head was ported so their z was boosting higher than 16.5 psi.