Smooth, fast launch with DSC on/DTC off?

[Mr Whippy]

Hi Dom,

The yellow curve is the drag correction, but as said, it's incorrect really... drag would be higher than that, which in turn would result in a lower power/torque figure.

But in this instance I was looking for the correct shape of the curve. Since variables such as exact atmos pressure, air temp, and vehicle weight were not known, along with other factors, then it was hard to correct to flywheel power from net wheel power.

Iirc, the run was done in 2nd gear. It is a net wheel power plot (power = mass x acceleration x speed) reversed out to give torque from the rpm logging, and then corrected back to flywheel power/torque after correcting for other variables.


But as said, the shape is right here which was the main goal.


Yep 6k rpm is good enough to change really. And I drive with sport off quite a lot too since there is no benefit to it unless you are on open roads where you are not gonna be lifting off in a few seconds due to traffic ahead etc

Dave

 

[MrPT]

Update... I changed my tyres for Vreds and can put way more torque down now without having to turn DTC on. The difference is huge, even on slightly damp roads.

Did a lot of "B road science" in and around random Bucks villages yesterday to prove this. With DTC on the Vreds are a lot more predictable. Some of the local birdwatchers will have heard a couple of interesting new chirps. :?

 

[mad4slalom]

you say dct off is a waste of time as the inside wheel just spins, in the m we have the lsd, i find i always switch dsc off as it over nannys yoy and saps revs too much , the diff is so good at getting the power down that i am still unsure wether it is totally off when switched off, although everyone on here catagorically says that it is. guess its just the nature of the diff. have modded the cdv too and loads better but even with the restrictor punched out it is still a vey small diameter so am thinking of completely removing the cdv altogether, ten min job to see if that aimproves it further, any thoughts or experience of this anyone