M3 M-drive Throttle Settings

TX · 12-13-2010, 04:21 AM

First off I tried searching for this so please do not bash me too harshly for asking this. I know the M-drive sport setting gives you a more choppy feeling, but I just assumed it was remaping the throttle feel in the drive by wire system (i.e. less travel gave you more go). Then I read this article on the 09 m3 like I have and was curious about this line:

"Three control maps are also available for precise, on-demand management of the engine. These management functions operate not only on the position of the throttle butterflies in the intake manifold, but also on further factors and parameters significantly changing the behavior and response of the engine"

Does it really change the intake butterflies? I always assumed it just changed how much reply you got from the pedal travel.

It's near the bottom. I hope this isn't breaking rules by posting this link. I'm not plugging his site or trying to make money off it. If its out of line please delete it.
Article:
http://www.rsportscars.com/bmw/2009-bmw-m3-coupe/

Edit: does anyone know what "other parameters" are adjusted with the throttle settings?

G.R · 12-13-2010, 07:23 AM

The power button is the main factor for the adjustement in the throttle

mkoesel · 12-13-2010, 09:27 AM

Quote:

Originally Posted by TX

Does it really change the intake butterflies? I always assumed it just changed how much reply you got from the pedal travel.

It's just two ways of saying the same thing though, right? When comparing the three programs, for any given throttle input, you could either say that the butterflies are in the same position while the pedal is in a different position, or that the pedal is in a different position while the butterflies are in the same position.

What they are not saying is that the different maps actually increase the operating range of the butterflies. That is to say, regardless of which map you use the pedal will be able to make the butterflies move from fully closed to full open.

Quote:

Edit: does anyone know what "other parameters" are adjusted with the throttle settings?

Gas mileage?

Just kidding - I actually don't know. What I do know is that the power and torque curve remain the same.

dpsfm3 · 12-13-2010, 09:28 AM

http://www.m3post.com/forums/showthread.php?t=456936

12-13-2010, 04:21 AM	#1
TX Captain 366 Rep 860 Posts Drives: 2009 ///M3 E92 APW 6MT Join Date: Dec 2010 Location: South FL iTrader: (0)	M3 M-drive Throttle Settings First off I tried searching for this so please do not bash me too harshly for asking this. I know the M-drive sport setting gives you a more choppy feeling, but I just assumed it was remaping the throttle feel in the drive by wire system (i.e. less travel gave you more go). Then I read this article on the 09 m3 like I have and was curious about this line: "Three control maps are also available for precise, on-demand management of the engine. These management functions operate not only on the position of the throttle butterflies in the intake manifold, but also on further factors and parameters significantly changing the behavior and response of the engine" Does it really change the intake butterflies? I always assumed it just changed how much reply you got from the pedal travel. It's near the bottom. I hope this isn't breaking rules by posting this link. I'm not plugging his site or trying to make money off it. If its out of line please delete it. Article: http://www.rsportscars.com/bmw/2009-bmw-m3-coupe/ Edit: does anyone know what "other parameters" are adjusted with the throttle settings? Last edited by TX; 12-13-2010 at 04:23 AM.. Reason: Last line addition for a Q and typo
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12-13-2010, 07:23 AM	#2
G.R Private First Class 10 Rep 105 Posts Drives: AW E93 M3 Join Date: Aug 2010 Location: Australia iTrader: (0)	The power button is the main factor for the adjustement in the throttle __________________
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12-13-2010, 09:28 AM	#4
dpsfm3 M enthusiast. BMW CCA member. 13 Rep 156 Posts Drives: 2011 M3 E92 7MDCT AW loaded Join Date: Nov 2010 Location: San Francisco, CA iTrader: (0)	http://www.m3post.com/forums/showthread.php?t=456936 __________________ 2011 ///M3 e92 7MDCT 19", Alpine White, Black Leather/Carbon, Loaded 2005 ///M3 e46 6MT 19", ZCP, Carbon Black, Black/Alcantara seats (sold, but not forgotten!)
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