6 deg KR, 11.3 A/F

[disco stu]

The deal is, about 6deg KR, 20 psi with SMC on all the way with 93. This is at 11.3 A/F on the wideband. Where do I go from here? Turn the boost down? Is it TOO rich? I am afraid to lean it out any more. I used to run 21 on 91 and alky. (all that was available in that region).

 

[BoostKillsStres]

You might just try pulling the boost back some to a point w/o knock then slowly start leaning it out some to see if that makes a difference and see where you can get. I bumped 21 psi tonight in 1st w/ my new CPT66BB on my 93 chip and no alky and had 3.2 knock at 12:1 A/F.

Good luck.