20psi!!!.....Good luck with that.

V. Nice ride mate, best I've seen in Perth so far.....I'd be seeing the boys over at ASG for the stock ecu tune especially if you're trying to push 300+whp on stock internals, you'll want things to be very safe tune wise. 18psi tops would be my advice tapering down towards redline to protect the engine (say 14-15psi).