Agreed, I targeted 13:1, but when I added timing, and made no more power, I started to lean it out to 13.2 just to see if there was a difference.
It's so weird because I'm reading most nismo's dyno at the 285-290 range. When I hit the same dyno with mine (13 Nismo, Stillen Gen 2's and Tomei Single Catback only), I only saw 270, and I didn't even touch the ECU on mine.
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