I have a gtx30r gen 2 .82 currently on a ej207 v8 with built heads and cams. Wondering if it's worth it to upgrade to a gtx35r and how much power gain I would see. Currently I make full boost at 4.8k which is 28psi. I want to crack 500whp, I have no idea what power I'm making now, I'd say around 480.
If I get the 35r gen 2 should I go .63 or .82? Also could I turn the rpm up to 8500 safely?
Car is 2005 wrx, daily driver, no track time
Ej207 v8 gsc s1 cams valves springs retainers
50/50 meth injection and 93.