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2Addicts | BMW 2-Series forum Technical Topics B58 (M240i) Engine, Transmission, Exhaust, Tuning JB4 + MHD Backend flash

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      06-11-2019, 08:56 PM   #1
baldeagleman
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JB4 + MHD Backend flash

I was wondering if anyone could explain the JB4 + MHD backend flash. I am currently just running the JB4, but I have seen people talking about adding MHD backend flash to make it better. Could someone explain what running both JB4 + MHD would give you as opposed to say, just the MHD backend tune? I am wondering if I should sell the JB4 and switch over to just MHD, but I have seen people talking about running both and I haven't found one location that explains everything.
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      06-12-2019, 11:05 AM   #2
KjPerry
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I was curious on this same topic as well.

Bald - have you done any other performance modifications or tunes outside of the jb4?
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      06-12-2019, 01:34 PM   #3
greg21040
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I asked about the same and BMS replied with links. Here's the reply:

JB4 with our back end flash makes about 460 wheel hp with just JB4, intake and our back end flash .

https://www.n54tech.com/forums/showp...;postcount=106

Info and notes on the back end flash is here.
https://www.n54tech.com/forums/showthread.php?t=57432
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      06-12-2019, 05:09 PM   #4
Dylan86
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If you plan to integrate meth or PI, the JB4/BEF is the way to go.

Otherwise I can't see the need, as these tunes offer most of what the JB4 offers for features, aside from the integrated meth management.
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      06-13-2019, 04:58 AM   #5
baldeagleman
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I just have BMS intake and vrsf downpipes.
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