2021+ M340i Tuning Vs Earlier ECU

340TBD · 09-22-2023, 11:36 AM

Has anyone made 500whp on the 2021 with femto unlock and Flash tuning? Not interested in JB4.

Can you make the same power with the 2021 m340i compared to say a 19 m340i on custom tune?

I'm aware of the tuning options but info is hit or miss.

Thanks

340TBD · 09-28-2023, 08:58 PM

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cyam · 09-29-2023, 08:35 PM

Quote:

Originally Posted by 340TBD

Has anyone made 500whp on the 2021 with femto unlock and Flash tuning? Not interested in JB4.

Can you make the same power with the 2021 m340i compared to say a 19 m340i on custom tune?

I'm aware of the tuning options but info is hit or miss.

Thanks

I have a 2020 tuned, but from people I have spoken with, the answer to your question is yes. They are essentially the same, just the unlocking procedure is more arduous.

mondayze · 09-29-2023, 10:35 PM

same car, same engine, same power. 21+ is just harder to get unlocked.

09-22-2023, 11:36 AM	#1
340TBD Enlisted Member 2 Rep 39 Posts Drives: B58, N54 Join Date: Aug 2023 Location: USA iTrader: (0)	2021+ M340i Tuning Vs Earlier ECU Has anyone made 500whp on the 2021 with femto unlock and Flash tuning? Not interested in JB4. Can you make the same power with the 2021 m340i compared to say a 19 m340i on custom tune? I'm aware of the tuning options but info is hit or miss. Thanks
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09-28-2023, 08:58 PM	#2
340TBD Enlisted Member 2 Rep 39 Posts Drives: B58, N54 Join Date: Aug 2023 Location: USA iTrader: (0)	Bumb
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09-29-2023, 10:35 PM	#4
mondayze Captain 495 Rep 960 Posts Drives: G20 M340xi LCI Join Date: Jul 2022 Location: Santa Clara Valley, CA iTrader: (0)	same car, same engine, same power. 21+ is just harder to get unlocked.
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