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      02-10-2020, 01:12 PM   #1715
drwillb's Avatar

Drives: e30 M3, e30 M3, e46 M3
Join Date: Aug 2008
Location: northern NJ

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Originally Posted by sizablepants View Post
What is the status right now on tuning n55 engines? I am in the market and have come across a 2012 135i and am trying to decide if I should hold off and just find an n54. I like the functionality and ease of access for MHD but I am having my reservations after coming across this thread. Are the throttle issues prominent enough for me to steer clear from MHD? Should I just do a JB4 tune instead? If you were tuning your 135i for the first time right now, what would you use? (I know this is an MHD thread but I wanted to hear from actual MHD users)
I've got a 5/2012 135i and I ran JB4 for 4.5 years until OBD unlock became available last fall. I run JB4 BEF so I'm not feeling the pain the OTS guys are but that's because JB4 allows me to tame the poor behavior from the flash. Once the tuning tables get sorted and late e cars start running smoothly then I'll switch to OTS and probably get a custom tune.

JB4 by itself with a PS1 was OK but adding the BEF through MHD has made it much better. Still, not the rock solid performance I'm looking for but I'm back in the waiting game.
2012 135i Mods: air scoops, CP, BMS filter, PS1, N20 TMAP, ADE FMIC, BMW PE, JB4, BMS BEF, 1M front body, full M3 suspension
Owned so far: 88 M3 x 2, 95 325is, 95 M3 x 2, 06 Mini Cooper S, 08 335 xi, 09 Z4 35i, 01 M3, 12 135i