DTC or not to DTC

GedS said:
Everyday use - All on, Drop The Clutch - DTC, Triangle with exclamation mark - Why I bought the car!! The car is free, the acceleration is sharper, gears are more responsive, you are driving the car, without a computer keeping you alive.

I refuse to waste money, but I am determined to wear out the budget tyres that came with my alloys, before the summer, and for that its OFF OFF OFF. Plenty of near ditch, brown trouser time!

Genuinely laughed out loud enjoying reading that last bit.

Turned mine completely off the other day in the one sunny day we had, not quite ready to turn off in the ice just yet before becoming the Stig
 
My understanding of the three stages of control are as follows.

Normal - No lights on dash - Car will detect slip and pull throttle control and apply brakes to relevant wheels. No fun allowed.

DTC mode - DTC light on dash - Car will now allow some fun, won't pull throttle control but will still apply brakes to relevant wheels if it detects lateral slips. Fun with a safety net.

DTC/DSC off mode - Yellow triangle symbol on dash - You're on your own. Car will do nothing to stop slip and slides. ABS is your only saviour.


I spend most of my time in DTC mode.
 
DTC still quells excessive wheelspin, aims to provide an LSD aping approach but in practice is not as good. Allows more slip than DSC (no button pressed, on as standard) in both wheelspin and lateral movement. DSC is Dynamic Stability Control and DTC is Dynamic Traction Control. The handbook says DTC is for snow but in reality it's a just a more relaxed mode.

I too spend most time in DTC as I find my inside rear spinning away all the power otherwise, particularly pulling out at a T-junction., Still gets small sideways slip angles but stops you going too far. Pulling off sharply with DSC can be a bit stuttery, DTC is far smoother. Off usually wastes power on one wheel.
 
when I had the z4 coupe, I used to get in, turn the DTC off via a long press and activate the sport button.

I don't turn it off very often in my M3, especially in current weather.
 
It's a play on the dopler effect. In astronomy hubble figured out that hydrogen adsorption lines in light from distant stars was moved towards the red end of the spectrum when compared to that of adsorption on earth.. he used the dopler effect to explain it where the pitch of sound appears to increase in frequency and therefore speed as the sound moves away from you. Obviously with light the speed cannot increase as it all moves at 3x10^8 m/s but it is none the less shifted towards the red part of the spectrum which is a shorter wavelength. He concluded that distant galaxies must be moving away from us as all their light is red shifted. The amount of shift is more or less equal to the speed they are moving away.
So in saying my speed was red shifted I'm implying that my speed appeared higher than 70 due to the dopler effect in that it was red shifted.

Blue shift would imply I was going slower amd frankly that's a load of tosh.

:)
 
Thanks - still not much wiser than when I'd guessed red was speeding, but appreciate the detailed reply!

Certainly noticing a lot of things my GCSE physics forgot to teach me!!
 
I rarely switch of the DSC in mine unless the roads are bone dry, and even then it's a bit scary. I do use the sport button the whole time - some people say the M doesn't need it, but I love the way the car feels barely leashed with it on :driving:
 
Funny I didn't think of my 3. 0i as tail happy at all. Always thought it to be a bit benign. But yesterday the dreaded orange brake pressure sensor light error combo on the dash came on. And on a warm enough to have the off down sunny dry day I lost the back end when flooring it on a roundabout.
 
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