Reason behind the MPE controller

ming_lau · 12-13-2021, 07:30 PM

I am suffering from the bad connection between the controller and receiver. It is to my understanding that the standard exhaust has a single valve motor and is controlled by wire. I am curious to why BMW didn't just use that for their MPE and instead went with this BT route. My assumption is because the MPE is pretty much a straight pipe with valve open and would not pass most countries regulations. On the other hand, the F8X MPE's are not by BT and would open with Sport Mode and no "track only" warning.

The control logic behind the stock exhaust is correlated to the driving mode and throttle input. With that being said, would it be possible to splice the stock valve motor wiring and drive the 2 valve motors of the MPE?

DanG · 12-13-2021, 08:59 PM

MPE valve open is too loud to be legal in the US. That is why the BT controller is labeled track use only.

12-13-2021, 07:30 PM	#1
ming_lau Private 13 Rep 54 Posts Drives: F87 M2 Join Date: Sep 2019 Location: British Columbia iTrader: (0)	Reason behind the MPE controller I am suffering from the bad connection between the controller and receiver. It is to my understanding that the standard exhaust has a single valve motor and is controlled by wire. I am curious to why BMW didn't just use that for their MPE and instead went with this BT route. My assumption is because the MPE is pretty much a straight pipe with valve open and would not pass most countries regulations. On the other hand, the F8X MPE's are not by BT and would open with Sport Mode and no "track only" warning. The control logic behind the stock exhaust is correlated to the driving mode and throttle input. With that being said, would it be possible to splice the stock valve motor wiring and drive the 2 valve motors of the MPE? Last edited by ming_lau; 12-14-2021 at 10:54 AM..
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12-13-2021, 08:59 PM	#2
DanG Major General 10661 Rep 6,937 Posts Drives: 2018 M2 AW DCT Join Date: Aug 2012 Location: Seattle, WA iTrader: (1) Garage List 2018 BMW M2 [7.68]	MPE valve open is too loud to be legal in the US. That is why the BT controller is labeled track use only.
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