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Message: <blockquote data-quote="NERD" data-source="post: 644501" data-attributes="member: 8956">Will the dyno have a sniffer to read A/F or do you have a wideband? You can add to the tune but I would start fresh and build a new file.You don't need a 90mm Maf, the only thing you'll ever need with that setup is "maybe" slightly bigger injectors to be back in the 70% duty cycle range.If you have a way to measure your A/F & you're half way good at manipulating your tune, you'll be at the 230-240rw range. (welcome to 20% drivetrain loss because of your Auto, lol.)Also, is your tune now from the same tuner?</blockquote>