Hey people,

Just a quick question. I've been trying to find out roughly what the safest maximum boost pressure is on a VF35 with an STi standard topmount.... to no success.

I've just had my car tuned, and in the midrange for roughly 2000rpm it generates 22psi...only to taper back to 17psi.

I picked my car up on Thursday and all was good. However, after doing a fair bit of "start stop" city driving today, I managed to hear it detonate. Not good.

I'm thinking that, due to the fact that it has only happened in city driving, the intercooler is probably heat soaked and thus creating relatively high inlet air temps....which is probably causing the detonation.

My tuner is coming out to my house tonight to trim it back, so I'd like to lower the boost.

Im thinking 19psi? Any opinions?