my IX on e85 made 410whp stock cams on a slipping stock clutch at 28psi.

 

Rod bolts are more of a requirement than headstuds.

I have run 30+psi for the last 31k miles on my stock headgasket and head bolts. Most of this has been on racegas/pumpgas mix, AVgas 100/130 (way back in the day), straight pumpgas, or E30.

I have ran up to 36 counts of knock on various occasions when boost controllers failed or wastegate lines fell off and the boost spiked over 33psi.

Still no headgasket or headbolt problems.

 

i'm making 351 on 92 octane no meth with s2's, tuned for 24lbs with stock wg. I's pretty sure with meth and a wg 400 wouldn't be a stretch, or e85

 

Oh yeah, let me state that I'm running the "ORIGINAL" Profec B and not the second verson. They no longer make this anymore. It's really old haha.

 

Oh man... that's not good..

 

Haha, I hear that. I actually dug into some research on it and can't find much info because it's so old and outdated. Oh well, I'll get me different one if this one doesn't work out

 

Oh yeah, thanks for the input from everyone. Keep the advice coming!

 

Well a 400whp EVO8 should be trapping 120mph. I don't see many of those popping in here.

Either way .... I wish you luck with the 9 turbo but I don't think it will be enough for you. You might as well keep the stock 8 turbo .... get good cams and meth then wait to upgrade to a green.