Max boost on Pump gas (91 octane)?

[240SXer]

yes, I used the search and can't find anything.

I was curious, i'm gonna be running a S13 blacktop with a big hybrid skyline intercooler, and a greddy boost controller. I was curious, what is the max amount of boost that can be ran on pump gas without detonation? I've heard 10 psi, 12psi, 14psi, just about everything. I know the injectors can only handle 14psi, but can you do 14psi on pump gas?

Thanks....

[S13240]

Go Dyno

[RobDET]

for the past couple weeks i've been running 12 psi with the timing accidentally fully advanced and i had no audible detonation. The car was really fast tho!

[240SXer]

So with timing slightly backed off I can run 12 with no problem? How about 14?

[RobDET]

I run 12 every day all day but we have 93. I have run 14 for several days with no isses though.

[240SXer]

I only plan on boosting up to 12-14 specifically for racing. Otherwise I'm gonna run stock boost.