twin turbo 331 ????

[PKRWUD]

Originally posted by 91GTturbo
Chris,

Are you talking non-intercooled or intercooled boost?

Non-intercooled. Like I said, there are alot of options that can change the recommendation, but with a stock set-up (9:1, 69cc heads, stock gaskets and bolts, and no intercooler), the fine line between safe and dangerous is 6psi on pump gas. Larger cc heads, o-ringed gaskets, ARP studs, heavy duty pistons, etc. all can contribute to higher safe boost levels, but it's still an octane game. If the pressure get's too high for the octane to control, the mixture will just start popping like pop corn.

Take care,
-Chris