Quickest M3 E92 DCT shift mode setting

[tekaefixe]

Hi dear friends of the forum

This might be a dumb question but I really would appreciate your experience and inputs on my question.

I have a 2011 M3 E92 DCT (with Mike Benvo's engine and DCT tune) and I've always driven the car in manual mode 5. I always thought this mode and mode 6 was the quickest and most aggressive shifting possible.

But today as I was explaining the different modes to my gf I noticed that in mode 1 the least aggressive the shifts were less dramatic ( without the kick in the back ) but much faster than in mode 5. It seamed I was driving a Ferrari 458 Italia really!! Maybe it's only and impression but level 1 had no kick in the back just shifted faster. In mode 5 or 6 in red line ( shift lights in red ) you shift, kick in the back next gear, red lights again,shift, kick in the back and so on and so on. In mode 1 it just shifts, no kick in the back just 2,3,4,5 no drama, no emotion just seamless shifting ferrari style. Mode 5,6 is more like a Lambo Aventador ( single clutch gear box ).

So my question is, to all of you who have driven the car hard, on road and on track, what's the fastest shifting mode? I'm I just imagining things or actually the higher the mode, more brutal and emotional shift but also slower the shifts??!!

Sorry but I'm really curious with your answers

Again thanks for the time and atention guys


Your friend


Paulo

[bimmerfrk]

What?! 1 least aggressive, 6 most aggressive. Always has been this way, always will be.

Pics of stated GF or it didn't happen.

[tekaefixe]

I'm not talking about aggressive shifting ( kick in the back ) but seamless shifting ( super fast, no lost of momentum ).

Which mode is the fastest? Do you guys know what I'm trying to talk about?

Again thanks for the help and attention

[BrewRifle]

6 should be the fastest. What differences are you seeing on downshifts between S1 and S6?

[SenorFunkyPants]

The shift speed is essentially the same regardless of the gearbox setting. As one clutch closes the other opens to give a seamless blend of torque. The settings affect the amount of power that is applied during the shift...in low numbers S1/2 the torque is reduced before the shift to give a smooth shift, in high numbers its essentially a power shift.

[tekaefixe]

Thats really interesting!!! So what you're saying is that from 0 to let's say 200 kph in S1 or S6 will take the exact same time right?

[crypticc]

Doesn't 1 overlap the clutches more? Is that what he is feeling? Drive not being interrupted.

P.s. under full power I would expect this torque blending to wear the clutches slightly I would guess

[Beemdog]

Reduced torque during a shift will slow the car's rate of acceleration slightly. The harder shift should be faster to a given speed barring traction loss.

[modkrazy]

Placebo. The lower drivelogic modes shift so smoothly, it feels like it happens in an instant. It happens in an instant in higher modes too, but that torque kick/tire chirp/rev match makes for a more lingering impression on you.

[tekaefixe]

Originally Posted by modkrazy

Placebo. The lower drivelogic modes shift so smoothly, it feels like it happens in an instant. It happens in an instant in higher modes too, but that torque kick/tire chirp/rev match makes for a more lingering impression on you.

So again from 0 to ..... will be achieved in the same exact time from mode 1 to mode 6 right?

Again thanks for clearing this matter to me guys

[modkrazy]

Depends on traction conditions. Lower modes would do better on wet roads.

[MTM]

I wonder if what you are noticing are the lower RPM set points for the gear changes using the lower settings? It might feel like the gear changes are quicker when, in fact, they are happening at lower RPM's so they spaced closer together....?

[///M Rakete]

Originally Posted by tekaefixe

So again from 0 to ..... will be achieved in the same exact time from mode 1 to mode 6 right?

Again thanks for clearing this matter to me guys

Uh, I don't think so.

What you think is a fast shift is simply one so moderated in terms of clutch take up that the interruption of transferred torque during shifting will be more in lower modes than higher.

Now if Mode 1 is already at the limit of tire adhesion for your conditions then I would agree with you as traction control or a crash would rob the higher modes of their potential. But that's a ridiculously extreme case.

If you can put all of the car's power down and do so in Mode 6 (no DSC) you will have the best acceleration curve possible. All the power plus minimal interruption or "smoothing" during shifts.

I've driven a few M4s now and that flat torque curve plus a relatively light weight have the tires scratching for traction on any pavement less than smooth.

Could it be that the old days of driving your pickup with some sand bags in the back are back?

[Kung Fu English]

Think of it this way.

You are accelerating at a certain rate and you get to the point you need to shift.

In S1: When you shift, you keep accelerating at that same rate and it's very smooth.

In S6: You get more power and you start accelerating at a higher rate. This is the kick you feel and it launches you forward.

[FormulaMMM]

[///M Power-Belgium]

Originally Posted by FormulaMMM

Very interesting video !
THX for sharing
BTW...Would love to see such a video....///M4 vs ///M3E92 !

[tekaefixe]

Ahah really nice video all doubts cleared