leaning off to well over 15:1 is safe in vacuum. The only risk is the cat not operating efficiently (or exhaust wheel erosion if you go way too lean).

Who would run 14's on boost? lol

I tuned for 11.7's at peak boost, I can go to 11.9 without issue but settled on 11.7 for a little more safety.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]