jaybuni

Has anyone fitted traction control to their 928?

Mine is being fitted with one of these next week with the digital monitor:

http://www.racelogic.co.uk/?show=Traction_Control


Any comments would be greatly appreciated.


Cheers buds

Alan

I have one - its called PSD.

This system sounds like it reduces total engine power to cure single or multiple wheel slip. Its more beneficial to introduce wheel to wheel limited slip or locking like a mechanical LSD or PSD does for single wheel slip on the driven wheels and engine power reduction for multi-driven wheel slip (or non driven wheel slip under power).

Its not really clear how this system works - individual wheel sensors on all wheels? & a throttle modulator?

Alan

Tony

I always thought it would be cool to get the ABS sensors to do the work for you somehow, then modulate the timing a bit.
Ill stick to the "feathering" method until then.

stuartph

Syed


Who is fitting the kit for you ?

stuartph

Alan


The system works but cutting singal to the injectors when slip is detected

slate blue

That price is quite cheap if it is the fitted price, if it isn't it is a bit on the pricey side as you can buy a DTA system S80 that does all that and more for only a couple of hundred more. I think you need to ask whether you really need it as most of these features will actually make the car slower. My proof for that is the Ferrari Mattino where on its most consersative setting it is the slowest and doesn't basically slide at all. The race setting is of course the fastest, this system is a combo of a PSD and engine power tailoring.

Greg

Jim bailey - 928 International

WHY ?? if wheel spin is an issue fit a limited slip to INCREASE traction...

mark kibort

thats not really traction control, its throttle modulation based on slip. traction control is applying the power to the right wheels and throttle control as well.

Alan

Exactly my point - do you want to gain better traction by reducing total engine output or gain better traction by reducing slip on the wheel thats slipping without reducing engine output...

Which do you think will be fastest...?

Now admittedly neither LSD or PSD will do throttle/power modulation when multiple wheels slip (say both driven wheels) or when the 'steering' wheels slip in a turn and a really fast system could do this better than the driver..

But add the limited (driven wheel) slip first and then the throttle/power modulation as 2nd order improvement for optimal results...

However here - if you installed this system and an LSD I suspect the system would (at least partially) defeat the operation of the LSD...

Alan

TRUESCOTSMAN

As far as i know, the F1 cars have a fixed diff set-up with a cutout , whether it be spark or fuel, probably fuel, as cutting the spark would leave unburnt fuel in the cylinders. If you had the later model S4 or a GTS i supose you could use the electronics that are already in place for the psd unit and instead of activating the psd it could trigger a relay to cut the power to the injectors when the wheels stat spinning up.

Alan

Why instead? (this would initially be worse...) -only if rear wheel locking doesn't restore traction would you want to dip power - right?

On F1 cars there is so much more HP available you get in to trouble faster - how many928's (with good tires) are hitting this on both rears regularly...? I don't and I drive it hard...

Alan

John Speake

You could use the same function that protects the auto box during gear changes on the later cars, this retards the ignition by quite a large amount to reduce the torque.