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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications Ditch JB4 for BM3?
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      07-27-2020, 01:02 PM   #1
M3Va
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Ditch JB4 for BM3?

Should I swap my JB4 for BM3? I have a 2013 BMW 535xi FBO. Runs good, just wondering if BM3 would get a little more power.
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      07-27-2020, 03:25 PM   #2
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Most of the reviews say BM3 or MHD are smoother and better driving than any piggyback. And yes, typically a little more hp/tq can be made. Iíve seen some people keep the JB4 and the tune for maximum control.
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      07-27-2020, 05:21 PM   #3
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ditch it. MHD David Shoup. BM3 Kevin Baldi. Case closed
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      07-28-2020, 08:27 AM   #4
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What about keeping the JB4 with an MHD Back End Flash?
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      07-28-2020, 11:30 PM   #5
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Quote:
Originally Posted by M3Va View Post
What about keeping the JB4 with an MHD Back End Flash?
that's fine if you want to use it for the gauges
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      07-29-2020, 07:58 AM   #6
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I'll be happy to sell you a bootmod3 license, but if you are happy with the Jb4 i would not change it
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      07-29-2020, 08:24 AM   #7
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Change that crap! All that gives is problem but really if you want factory like power delivery and smoothness to power curve then go bm3.
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      08-01-2020, 08:59 AM   #8
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Quote:
Originally Posted by ziekxq View Post
Change that crap! All that gives is problem but really if you want factory like power delivery and smoothness to power curve then go bm3.
seems like this is the way to go. i've seen some post about how customer service is lacking for MHD and their issues they've been having lately
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      08-01-2020, 01:10 PM   #9
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Quote:
Originally Posted by lsturbointeg View Post
seems like this is the way to go. i've seen some post about how customer service is lacking for MHD and their issues they've been having lately
Hmm I didn't recommend MHD because he didn't ask about it :P. I have had 0 issues with MHD and prefer it over BM3 for simplicity.

Last edited by ziekxq; 08-01-2020 at 04:41 PM..
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      08-01-2020, 08:59 PM   #10
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Quote:
Originally Posted by ziekxq View Post
Hmm I didn't recommend MHD because he didn't ask about it :P. I have had 0 issues with MHD and prefer it over BM3 for simplicity.
From what I've seen posted on YouTube. U still have til next year anyway before I pull the trigger. Well see than
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