stretch-d

Got detonation? Not enough fuel will cause this.
Also, What is your exhaust system like? A restriction could cause detonation. Check your cat.

MR_DR_PEP

I've got an open race cat with 2" exhaust... will upgrade to 2.5. It should be getting plenty of fuel. I'm using a boost rom with 7% more fuel in the areas that I heard detonation.

stretch-d

That 2.0" exhaust is most likely the culprit. You're probably getting some reversion of the exhaust gasses back into your combustion chamber. After you upgrade to 2.5", you'll have much better flow and will most likeley need to re-map your air/ fuel mix. What's more... There's a good posibility that you won't need so much timing retard giving you better throtle
response and torque down low. I would do this asap. Even moderate detonation is extremely destructive.

Ziggy

What are you running for a fuel pump and injectors?
Do you have access to a wideband?

Semnos

I would say MR_DR_PEP use other plugs...those bosch 4 plug things aren't boost friendly and yeah go with a bigger exhaust .
Haven't seen ya for a while here man...no internet at college?

surfer

I got super 4's and my car runs like ----, are they really that bad ?