I havent had any problems with the JB4 communicating with the ECU and I have been tuned for about 2 years now.....So dont know where that info came from... So a 12.6 on NEW TUNE and NEW AA TURBOS....I know your wheels and tires are KILLING you in the quarter mile but with a upgraded turbo car I still think you should have been in the low 12's. I ran an 11.7 @ 117mph and was on the JB4 G4 15ohm board and RB's, using about 2.5 gallons of E85 back then...Curious to see what I can cut now since I'm running the JB4 G5 ISO using about 5.5 gallons of E85/93. Good luck and cool your new tune is working out for ya
A/W E92 335i M-sport with JB4 G5 ISO/ E40 WEDGE PERFORMANCE BACKEND FLASH, Alpina TCU flash for AT/Switch-tronic +AR Downpipes, Stett gen 1 intake, Wagner-Tuning FMIC+RB Turbo setup/ RB PCV Valve+ Akro exhaust+60% E85/93 mix,+ HRE P40S wheels, KW coilovers, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@119mph on street tires) NO METH!