DS Mode shift points

GAaaAR · 11-04-2012, 04:17 PM

If you floor the car, does the DS mode shift at a more optimum rpm compared to D mode? Or do they both just shift at red line?

I am hearing the optimum shift point is usually around 6200 rpm or so, is that what the DS mode shifts at?

Braumin · 11-04-2012, 04:22 PM

It just shifts are redline, so best to do it yourself.

mike3000fl · 11-04-2012, 07:32 PM

DS shifts much higher than D.

D basically granny shifts at a lower RPM for a smoother shift and better fuel economy.

DS holds it in gear until close to redline.

The fuel injection program and ignition timing probably gets more aggressive in DS also. (dont know this for sure but it would make sense).

VTECaddict · 11-04-2012, 07:45 PM

Quote:

Originally Posted by mike3000fl

DS shifts much higher than D.

D basically granny shifts at a lower RPM for a smoother shift and better fuel economy.

DS holds it in gear until close to redline.

The fuel injection program and ignition timing probably gets more aggressive in DS also. (dont know this for sure but it would make sense).

"If you floor the car"

It will just shift at redline in both. DS usually when you're not flooring it just holds one or two lower gears than normal to give you better response.

Route 16 · 11-04-2012, 09:31 PM

When do we shift on DS? Don't FU me for noob question. Just facts.

SubzeroVR4 · 11-07-2012, 02:05 PM

I've noticed the shifts happen quicker in DS mode vs D. In D it feels like the transmission is trying to smooth out the shifting.

JRJ1970 · 11-07-2012, 02:29 PM

^
I hear this guy in his first sentence:
>>>I've noticed the shifts happen quicker in DS mode vs D.<<<

To me it feels like it shifts like this:

gear 2 when it would ordinarily shift to 3;
gear 3 when it would ordinarily shift to 4;
gear 4 when it would ordinarily shift to 5;
etc.

It's like it's always in D+1 gear so it allows the revs to go much higher. That make sense?

nailer335 · 11-07-2012, 02:39 PM

The most effective and accurate way to answer your question is: shift yourself, because D and DS will both take you to 7000rpm at WOT.

If you have a tune, log wide open throttle (WOT) runs, look at your boost curve on your data log and find the point in RPM where your boost starts to drop off to a psi level that is lower than where it would be at the start of the next gear. Ideally, you want to shift so as to maximize the area under your power curve.

The simple answer: at WOT shift around 6200-6300rpm.

This all is assuming that you have an n54 thats tuned. I'm on the mobile and can't see what you drive.

11-04-2012, 04:17 PM	#1
GAaaAR Captain 33 Rep 671 Posts Drives: 2009 E92 335i Join Date: May 2006 Location: NYC iTrader: (1)	DS Mode shift points If you floor the car, does the DS mode shift at a more optimum rpm compared to D mode? Or do they both just shift at red line? I am hearing the optimum shift point is usually around 6200 rpm or so, is that what the DS mode shifts at?
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11-04-2012, 04:22 PM	#2
Braumin First Lieutenant 37 Rep 373 Posts Drives: 2013 335i xDrive Sedan Join Date: Oct 2012 Location: Regina, SK, CAN iTrader: (0)	It just shifts are redline, so best to do it yourself.
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11-04-2012, 07:32 PM	#3
mike3000fl Banned 138 Rep 2,731 Posts Drives: 06 330i Join Date: Feb 2010 Location: Tampa iTrader: (0)	DS shifts much higher than D. D basically granny shifts at a lower RPM for a smoother shift and better fuel economy. DS holds it in gear until close to redline. The fuel injection program and ignition timing probably gets more aggressive in DS also. (dont know this for sure but it would make sense).
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11-04-2012, 09:31 PM	#5
Route 16 I got lei'd 844 Rep 7,593 Posts Drives: '10 E90 M3 Join Date: Sep 2011 Location: Dark Side of the Moon iTrader: (62)	When do we shift on DS? Don't FU me for noob question. Just facts.
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11-07-2012, 02:05 PM	#6
SubzeroVR4 Second Lieutenant 70 Rep 276 Posts Drives: F80 M3/F85 X5M Join Date: Jun 2012 Location: California iTrader: (0)	I've noticed the shifts happen quicker in DS mode vs D. In D it feels like the transmission is trying to smooth out the shifting. __________________ '16 BMW M3 '16 BMW X5M '23 X3 M40i (On Order) '21 Civic Type R
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11-07-2012, 02:29 PM	#7
JRJ1970 Captain 27 Rep 600 Posts Drives: 2014 428i F32 Join Date: Dec 2008 Location: San Antonio, TX iTrader: (0)	^ I hear this guy in his first sentence: >>>I've noticed the shifts happen quicker in DS mode vs D.<<< To me it feels like it shifts like this: gear 2 when it would ordinarily shift to 3; gear 3 when it would ordinarily shift to 4; gear 4 when it would ordinarily shift to 5; etc. It's like it's always in D+1 gear so it allows the revs to go much higher. That make sense? __________________ Jay (in San Antonio, TX) 2014 428i coupe, mineral gray metallic with black interior, black ash trim, luxury edition. Last edited by JRJ1970; 11-07-2012 at 02:47 PM..
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11-07-2012, 02:39 PM	#8
nailer335 Captain 25 Rep 699 Posts Drives: e90 335i f30 330i g20 m340i Join Date: Feb 2010 Location: Texas iTrader: (0) Garage List 2008 335i [0.00] 2022 m340i [0.00] 2017 330i xdrive [0.00]	The most effective and accurate way to answer your question is: shift yourself, because D and DS will both take you to 7000rpm at WOT. If you have a tune, log wide open throttle (WOT) runs, look at your boost curve on your data log and find the point in RPM where your boost starts to drop off to a psi level that is lower than where it would be at the start of the next gear. Ideally, you want to shift so as to maximize the area under your power curve. The simple answer: at WOT shift around 6200-6300rpm. This all is assuming that you have an n54 thats tuned. I'm on the mobile and can't see what you drive.
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