exhaust flap

thevinman01 · 05-09-2021, 11:49 AM

I was wondering how the exhaust flap works? I have noticed that when I have it on sport mode the flap opens when I accelerate and then closes when I let off the gas. is this normal? I'm on stage 2 with a burble tune and I hear the pops on one side of the exhaust. it also seems like the flap closes after 20 mph

mikeysosa · 05-11-2021, 09:23 AM

Quote:

Originally Posted by thevinman01

I was wondering how the exhaust flap works? I have noticed that when I have it on sport mode the flap opens when I accelerate and then closes when I let off the gas. is this normal? I'm on stage 2 with a burble tune and I hear the pops on one side of the exhaust. it also seems like the flap closes after 20 mph

I know this may be a bit off topic but have you ever considered a JB4? It allows you to control the flap manually. It's typically on in Sport mode and off in Comfort, although if you're having trouble with it, it would help. If that's too expensive, I'm pretty sure REMUS has a controller for it as well. And to answer your question, it's unusual although the exhaust flap seems to be a bit unpredictable due to temperature requirements and it requires that you be in Sport or Sport+.

jb-slow · 05-11-2021, 10:38 PM

Just turn the flap to always open with whatever you're tuning with. Or simply unplug it when it's open.

Jamesjedi · 05-16-2021, 02:36 PM

Unplug it? Where?

jb-slow · 05-16-2021, 09:38 PM

At the flap

flybywire · 05-16-2021, 09:47 PM

And when the 'fixing bow' (fancy paper clip) that connects the actuator to the flap breaks, as mine just did, then the flap gets to choose on its own. It chooses to rattle.

steevcruse · 05-20-2021, 07:19 PM

Quote:

Originally Posted by mikeysosa

I know this may be a bit off topic but have you ever considered a JB4? It allows you to control the flap manually. It's typically on in Sport mode and off in Comfort, although if you're having trouble with it, it would help. If that's too expensive, I'm pretty sure REMUS has a controller for it as well. And to answer your question, it's unusual although the exhaust flap seems to be a bit unpredictable due to temperature requirements and it requires that you be in Sport or Sport+.

bootmod3 also has exhaust flap manual settings.

-s

05-09-2021, 11:49 AM	#1
thevinman01 New Member 1 Rep 10 Posts Drives: BMW M235i Xdrive Join Date: May 2020 Location: NJ iTrader: (0)	exhaust flap I was wondering how the exhaust flap works? I have noticed that when I have it on sport mode the flap opens when I accelerate and then closes when I let off the gas. is this normal? I'm on stage 2 with a burble tune and I hear the pops on one side of the exhaust. it also seems like the flap closes after 20 mph __________________ Vincent nguyen
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05-11-2021, 10:38 PM	#3
jb-slow First Lieutenant 111 Rep 337 Posts Drives: m235i Join Date: Mar 2019 Location: puyallup iTrader: (0)	Just turn the flap to always open with whatever you're tuning with. Or simply unplug it when it's open.
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05-16-2021, 02:36 PM	#4
Jamesjedi Private First Class 27 Rep 189 Posts Drives: NA Join Date: Mar 2020 Location: Canada iTrader: (0)	Unplug it? Where?
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05-16-2021, 09:38 PM	#5
jb-slow First Lieutenant 111 Rep 337 Posts Drives: m235i Join Date: Mar 2019 Location: puyallup iTrader: (0)	At the flap
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05-16-2021, 09:47 PM	#6
flybywire Enlisted Member 14 Rep 46 Posts Drives: 2019 G20 330xi, 2015 F22 M235i Join Date: Aug 2014 Location: Rockville, MD, USA iTrader: (0) Garage List 2015 BMW M235i [8.50]	And when the 'fixing bow' (fancy paper clip) that connects the actuator to the flap breaks, as mine just did, then the flap gets to choose on its own. It chooses to rattle.
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