So far the best pure stock including run flats + tune is a guy running a E85 mix with the BMS flash who did 11.9/118. The 335is is an interesting car & sits between the 135is & 1M in available power do to the underlying factory tunes. If I am sloppy the car will overpower the tires so its about right for what it has in it.Įxpect as I start to pay more attention to the 135is, now past break-in mileage, it will also get stronger but I can't see it matching the 335is + its a stick which is a big disadvantage in a straight line run. If I am not doing a number of 3/4 gear WOT's on 5 to acclimate it I just leave it in 6 for DD. Its a nice smooth consistent map but map 5 can peak a bit higher on occasion. Since the E85 station closed I run a high percentage of 100 octane so my settings on that map add another 1.5/2.0 psi to every entry, sort of like a mini map 7. Map 6 on the current interface choice 6) on the settings page G5 ISO w/ BMS Flash, 1M, or 335is has its fixed boost setting in the 15/15.5psi range for most of the rpm choices for 93 octane or better fuel. That's why Terry said they were good to go with Map 2 back in the G4 days before he had ISO & the current interface as long as you had good fuel. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.The base factory timing curve for the 335is & 1M is different than the 135i/135is/335i & it can tolerate more boost without pulling timing. hey Bud,youd best ask Twinz for this,check Rennzport and see jb4 support thread. In addition the JB4 system is not VIN locked to your vehicle and can be quickly removed without a trace and swapped between cars or resold at a later time. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system.
The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. The JB4 is a plug and play tune available for turbocharged vehicles.
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