I daily 27psi and haven't had any problems

 

I hit 27-28 just for a brief moment with my evo 9 turbo on 93, it drops of quickly

 

93 octane stock turbo, cams, head studs, and 26psi. I have stock wastegate and tubular manifold and a O2 dump. 89xxx miles and running great. 360 awhp. No thoughts of ever having an issue.

A tune and supporting mods will make your car a different beast.

 

daily 27 psi on 93 octane for 1 year no issues. now been on e85 at 27-28psi for about 5k miles 0 issues.

 

How much hp and tq gains did you see just from fuel and a tune? I want to have mine tuned again and am considering e90.

 

Goin ham

 

picked up 45hp and 40lb at same boost level

 

Heck yeah I appreciate it man!