2008 Wrx Stage2 Over Boosting!
I just installed a Cobb down pipe with high flow cat to my spt exhaust with stock air intake box. I was spiking in 4th at 17.8psi, so I switched to the Cobb stage 2 low waste gate map and I was still hitting 17.1 in 4th and 5th. I'm running the 91 octane map which says peak boost is supposed to be 15 psi +\-.7, then I looked at the 93 octane map notes and it says peak boost of 16psi +\-.8. So I'm figure I'm on not that far off from the 93 octane map boost levels, but is that safe? I also lengthened my wastage arm to relieve some more boost but it still hit 16.9 in 4th and 5th. I also live in Denver at altitude so I do not know how this effects any of these numbers.