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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications M340i owners with jb4

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      09-21-2019, 06:09 PM   #1
Antec800
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M340i owners with jb4

Feel free to chime in, I took the jb4 off my 2017 340 and added it onto my m340 so far it feels a bit faster but the transmission shifting delay on wot is worse then on the f30.
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      09-22-2019, 07:18 PM   #2
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Feel free to chime in, I took the jb4 off my 2017 340 and added it onto my m340 so far it feels a bit faster but the transmission shifting delay on wot is worse then on the f30.
Most likely because it's not optimized for the 2020 M340. I keep saying this, while it's fine to transfer the JB it's not optimized for it. That's literally why there will be a new one. I'm holding out still.
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      09-22-2019, 10:02 PM   #3
Antec800
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I donít think there will be a new one, thereís nothing really to change it just needs a firmware update which terry said is coming soon enough
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      10-07-2019, 11:05 AM   #4
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BMS will probably release a new firmware optimized for this car. It will be the same Jb4 just a different software
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      10-07-2019, 11:58 AM   #5
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I have the jb4 installed for the 2020 Supra.

This is what Terry recommended to get.

Car runs and shifts perfectly.
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      10-07-2019, 06:22 PM   #6
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Have you posted logs anywhere? I have mine from my f30 leftover have thought about tossing it on.
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      10-08-2019, 04:46 AM   #7
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I emailed the logs to terry, a couple weeks ago still no word on cracking the dash to change maps through it, or firmware
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      10-08-2019, 05:01 PM   #8
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Can you send me the logs?
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      10-09-2019, 10:08 AM   #9
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I have the jb4 installed for the 2020 Supra.

This is what Terry recommended to get.

Car runs and shifts perfectly.
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      10-09-2019, 10:03 PM   #10
Antec800
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Can you send me the logs?
Whatís your email
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      10-10-2019, 09:24 AM   #11
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Whatís your email
Pm'd
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