STILLEN 370Z Supercharger System - Announcement!!!

Staples

He didn't go full throttle until about 4200rpms that's why the A/F dipped so low. You want to be at 14:1 when cruising, but it should immediately drop when giving it open throttle 50-100%. Optimal A/F on a supercharger is no more then 11.5:1 a/f, but you could always add a little extra fuel as a safety factor (which is what they did). On a DynoJet that would put down around 383/292 (just to give an idea comparing Stillen's dyno since it reads high to begin with). There's still power to be made by taking fuel out from 4600rpms all way to about 7400rpms, but the knocking needs to be addressed first.

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'08 Infiniti G37s - Forced Induction Fed