INSTALLING a JB4 Tune on my BMW G80 M3! 

Anytime appreciate the support! Definitely worth adding the JB4, opens the car up

@@sundeepm3i would like to add a jb4 on my m340i but im not sure adding more boost to my car without adding gas thats what a real tune do

@@b58forever You can run the Map 2 tune, which is made for 93. It’s conservative so made for that fuel

Custom tune gives you more power gains and jb4 can cause issues. Stay stock until you can do a proper unlock

Yeah an ECU flash tune will always be better than a piggyback tune. I’d advise Femto if you don’t mind shipping out the ECU and the extra costs

@@sundeepm3 ya I don’t mind shipping it out, I’ve got a MK7 GTI I can drive while I wait. And I agree custom tunes will always be better.

Yeah it does improve 0-60 times as well, but since I’m RWD the car doesn’t hook the best. I’ve heard Dahler is more smooth, but JB4 has more options like being able to run E85

@@sundeepm3 oh yea I had a RWD now I have the xdrive. RWD legit caused my crash.. thing went sideways into a fence. Lol. But yea, the dahler is 1k more expensive then the jb4 so I think the jb4 is the route to go. For the e85 do u need just the jb4 or do u need to install a flex fuel kit to be able to run e85.

@@G82Watts Yeah for the cost better off doing Femto instead of Dahler. You don't need a flex fuel kit if you follow the E content description on the map