Tune stacking
 

I really love the jb4 but want to change up the timing a little bit delete the top speed governor improve throttle response etc etc I can still run my jb4 with any flash tune correct I’m calling theses guys they telling me it won’t work with the jb4 but then bms is say they work with virtually any flash tune which is it

a lot of people have, thinking i may have to.

I've run map1, map2, and played a little with map 6 with a ESS flash tune with no issues so far.

Yes, you can run the Jb4 with any flash. ;)

I have been running my stage 1 with the jb4 with no problems at all.

How do I get that

Sorry for the late reply but i went to my local performance shop to get the ECU custom tune everything is in working order.