DTC vs ASC

[Boxerlust]

I have a question for people who know or can compare and went from a 2013-2017 GS to a 2017 1/2 GS or 2018 ADV.
I know my question is more of theoretical nature because on todays sticky tires 125 hp are not enough to break the rear wheel loose except on wet pavement maybe where most of us ride careful anyways.But anyways ASC compares wheel speeds (front & rear) and interferes while DTC puts also lean angle into account by using a yaw sensor.
Is there any difference you can feel on real roads or is only to stimulate sales ?
I myself fully leaned over and ASC-off with Pirelli Scorpion Trail 2 have never been able to break the rear loose on my 2017 GS-ADV still with the older ASC system...

 

[batman1]

If you are talking actual ‘feel’, to me all of the bikes feel very much the same on tarmac.

I’m currently riding my 5th (2018) GS-LC, my first GS-LC was the 2013 bike...which was probably the quickest out of the bunch.

Re ASC and DTC, when riding on tarmac, both functions feel the same, however I do seem to remember seeing the ASC warning triangle flash up more often on the early bike when pushing the bike hard on wet bumpy tarmac back roads, but that was on the 2013 pre-sanitised light crank model....the wild-one!

Sorry but I cannot advise you re riding on the loose as mine is a tarmac bike on tarmac tyres.

I think that the feature is more of a sales safety feature that will only be tested when you are in trouble and when you really need it, like ABS brakes.

In theory with the DTC, you should be able to give the bike a fistful of throttle in dynamic when cranked hard over in a corner, and whether it’s wet or dry it should fire you out of the bend without any issues, I’ve often wondered what it would be like to try it, but I’ve never had the bottle to risk it!

Why do you ask the question?

 

[Boxerlust]

Thanks for your reply !
The reason why I asked the question is like I mentioned more of theoretical nature as todays tires are so good that 125 hp are not enough to break the rear tire loose even fully leaned over when the pavement is dry.
I was just wondering on a trackday after lots of laps when the tires a really hot if the older ASC system or the lean angle sensor DTC system in DTC-Pro mode intervenes earlier or later to give more wheel-spin on the rear ?!
My guess is correct me if I'm wrong the ASC system that only compares front/rear wheel speed gives a liitle bit spin at the rear before it intervenes while the lean angle DTC system probably gives you less power at bigger lean angles because it is programmed in and doesn't spin the rear in first place ?
Or do they have it programmed that it gives more spin in first place before it intervenes ?
That was basically my question !

 

[ChazzyB]

Thanks for your reply !
The reason why I asked the question is like I mentioned more of theoretical nature as todays tires are so good that 125 hp are not enough to break the rear tire loose even fully leaned over when the pavement is dry.
I was just wondering on a trackday after lots of laps when the tires a really hot if the older ASC system or the lean angle sensor DTC system in DTC-Pro mode intervenes earlier or later to give more wheel-spin on the rear ?!
My guess is correct me if I'm wrong the ASC system that only compares front/rear wheel speed gives a liitle bit spin at the rear before it intervenes while the lean angle DTC system probably gives you less power at bigger lean angles because it is programmed in and doesn't spin the rear in first place ?
Or do they have it programmed that it gives more spin in first place before it intervenes ?
That was basically my question !

I think 125bhp in the wet with the best tyres, but no ASC/cornering ABS would have you on your arse pretty-damned-quick, if you weren't being "considerate".

 

[Wobbly65]

I play with the DTC in the wet just to see how much grip there is, theres generally a lot more than you think there is. You can crank the throttle open pretty hard and watch for the activation light to flash, it's a very smooth process. I like it when it flashes unexpectedly though, makes you think a bit.

I found a single track gravelly road and play around while upright so you get use to how it feels when it cuts in that way it won't distract when it does. It works very well alll in all.

 

[Popell]

I don't think you've got 125bhp to test the contact patch with in any case....

 

[stonehenge]

It won't stop the front sliding away though

 

[Boxerlust]

@Popell;you are right.There are probably only 115 horses being harnessed by the TC...
Tried to break the rear loose leaned over in the wet in 2nd gear to get the TC to come on.But the engine had not enough power to overcome the traction of the PST2 which I found interesting.
That is why my question was more of theoretical nature which system ASC or newer DTC-Pro allows theoretically more wheel spin leaned over.
My guess is that the ASC is not as smooth and lets the rear break loose momentarily before it starts cutting out power while the DTC system already takes lean angle into consideration and cuts power before the spin happens...But I might be wrong and therefore I asked who had experienced the older vs the new systems.
But I guess to really need or make the systems work to prevent a nasty high-side you really need 160hp + anyways.
As in rain or on dirty pavement you would crash anyways because the front lets go if you hit a patch of sand,gravel,diesel or such...

 

[stick]

Last year in The Spanish Pryenees riding hard the ASC (2016 TE) light was on most of the time when exiting corners , the roads were hot and the tyres also.The light consistently flashing annoyed me so i switched it off and to honest , no real difference but saying that if you feel the throttle and you riding in the so called zone your ability with the tyre movement ( if any) should be manageable

 

[Popell]

Perhaps the switch just stops the light coming on but nanny-bmw is still preventing us from falling outside the competence envelope

 

[stick]

Perhaps the switch just stops the light coming on but nanny-bmw is still preventing us from falling outside the competence envelope

No I'm sure it switches it off... if you test on a gravel road it shows on and off.

 

[Boxerlust]

On dry roads the 115rwhp can't break the rear loose.No need for TC.
In rain,maybe.It still would be interesting if someone could answer which system ASC or DTC-Pro allows more wheel spin while leaned over (theoretically)...