M1 vs M2 Exhaust note

Hammmerhead · 06-20-2016, 02:27 PM

Is there any difference between these two settings as far as the exhaust valves and how they interact?

onfireX5 · 06-20-2016, 02:33 PM

None

PatrickC23 · 06-20-2016, 02:53 PM

I would argue it does as M1 and M2 mean nothing other than they are programmable buttons. Dependent on how you have them set, it could be different as the valves may open sooner in sport or sport+ (if its similar to the F10 M5). If you have M1 as efficient and M2 as Sport+ I would think it makes a difference.

Alan l. · 06-20-2016, 03:28 PM

Is there a guide anywhere that talks about what exactly controls the exhaust valves from opening and closing?

onfireX5 · 06-20-2016, 03:41 PM

Mine are either open or closed. No partial. F10 could be different but the F85 is either open or closed. There is no part throttle part open or delayed opening.

onfireX5 · 06-20-2016, 03:43 PM

http://f15.bimmerpost.com/forums/sho....php?t=1171644

Hammmerhead · 06-20-2016, 05:42 PM

Thanks guys.

I couldn't really tell a difference, but my hearing isn't what it used to be. It seems in Econo mode they may partially open at half throttle or so?

Either way, its pretty dang loud in M mode for messing around town. The big chrome tips and big sound are almost yelling "custom" for the onlookers that don't know its factory. Its a unique sound, but still a little raspy coming from a 50i

06-20-2016, 02:27 PM	#1
Hammmerhead Private First Class 27 Rep 132 Posts Drives: 2016 X5M Join Date: May 2013 Location: Ozarks iTrader: (0)	M1 vs M2 Exhaust note Is there any difference between these two settings as far as the exhaust valves and how they interact?
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06-20-2016, 02:33 PM	#2
onfireX5 Brigadier General 3619 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	None
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06-20-2016, 02:53 PM	#3
PatrickC23 Colonel 187 Rep 2,245 Posts Drives: '16 991.1 911 GTS, '16 F85 X5M Join Date: Apr 2012 Location: NNJ iTrader: (0) Garage List 2013 BMW ///M5 [0.00]	I would argue it does as M1 and M2 mean nothing other than they are programmable buttons. Dependent on how you have them set, it could be different as the valves may open sooner in sport or sport+ (if its similar to the F10 M5). If you have M1 as efficient and M2 as Sport+ I would think it makes a difference. __________________ 2016 991.1 911 Carrera GTS 2016 F85 X5M - Carbon Black/Mugello Red
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06-20-2016, 03:28 PM	#4
Alan l. Major General 5453 Rep 8,815 Posts Drives: 2020 F95 X5M Competition Join Date: Jun 2009 Location: United States iTrader: (9)	Is there a guide anywhere that talks about what exactly controls the exhaust valves from opening and closing? __________________
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06-20-2016, 03:41 PM	#5
onfireX5 Brigadier General 3619 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	Mine are either open or closed. No partial. F10 could be different but the F85 is either open or closed. There is no part throttle part open or delayed opening.
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M1 vs M2 Exhaust note

06-20-2016, 03:43 PM	#6
onfireX5 Brigadier General 3619 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	http://f15.bimmerpost.com/forums/sho....php?t=1171644
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06-20-2016, 05:42 PM	#7
Hammmerhead Private First Class 27 Rep 132 Posts Drives: 2016 X5M Join Date: May 2013 Location: Ozarks iTrader: (0)	Thanks guys. I couldn't really tell a difference, but my hearing isn't what it used to be. It seems in Econo mode they may partially open at half throttle or so? Either way, its pretty dang loud in M mode for messing around town. The big chrome tips and big sound are almost yelling "custom" for the onlookers that don't know its factory. Its a unique sound, but still a little raspy coming from a 50i
	Appreciate 0 Quote