Joe A. ran 12psi for a year and never blew his motor. He used a thicker hg to lower compression plus a lot of know how on tuning. I forgot who claimed to have run 12psi consistently in Cali, but it was done with timing being retarded. These are the kind of things that would offset detonation at higher boost and very recommendable. If I were to REALLY want to try and run a consistent 12psi, I would start with an MSD DIS-2 and timing retarded about 4-6deg and larger injectors with an AFC. These are things that can help at any boost level anyway.

Oh, if you use 440cc you have ot use the 4:1 disc. The 12:1 will cause problems being ultra rich. With 550's you have to go 3:1.

MuRiX
97 Eclipse GS HRC Stage IV+
Sitting and collecting dust most of the time..
A.D.P.
http://www.murix.com