n54 cobb v4 combined with jb4 g5

[ghw1972]

Hi guys im a newby.

i have a 135i e82 coupe and i love it !

im a bike man normally (i have a aprilia rsv4 factory), so i like my the buzz
from speed and power !

I have started messing with my car already only having had it 3 months.

i purchased a jb4 g5 before xmas but have not fitted it yet due to the crap britich weather here. as a quick power fix i have a cobb v3 fitted which i am very pleased with the results. however it would be a shame to not use the jb4, can i run them together using the autotune on the jb4 with the map from the cobb v3 ?

may be this has already been asked, if so sorry.


cheers guys

[Solo_M_Tech]

Originally Posted by ghw1972

Hi guys im a newby.

i have a 135i e82 coupe and i love it !

im a bike man normally (i have a aprilia rsv4 factory), so i like my the buzz
from speed and power !

I have started messing with my car already only having had it 3 months.

i purchased a jb4 g5 before xmas but have not fitted it yet due to the crap britich weather here. as a quick power fix i have a cobb v3 fitted which i am very pleased with the results. however it would be a shame to not use the jb4, can i run them together using the autotune on the jb4 with the map from the cobb v3 ?

may be this has already been asked, if so sorry.


cheers guys

You can if you load the BMS back end flashes that are designed to work with the JB4. n54tech.com is the source. Check the N54 section and find the back end flash thread.