2013 M6 Coupe
-Backend Ecu Flash + JB4 BCM at 24psi on 93 Octane (Custom map 6)
-Stock Exhaust and intake
I had BMS stage 1 and car ran great at 19psi. I then installed Jb4 with BCM and at maxed out fuel trims and car was running inconsistent and funky. I said Fuck it, doing backend flash as I wanted to retain the JB4 BCM boost control feature with the Friendly Burger Tuning app. So.. Hats what I did!
Had the car now with over 300 miles on The combo above and the car pulls like a freight train!!!! Consistent all the time no issue.
See video below. Keep in mind Only mods are the tune stack on 93 octane. Everything else is stock!
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