To do proper traction control, you cannot just use the throttle due to
the lag, you don't want to cut all the cylinders either, ideally you
would start by retarding the ignition timing to reduce power, and
then if that isn't working enough you selectively cut cylinders,
probably by cutting injections, especially on a vehicle with a wasted
spark ignition system.

Martin.

> Andy,
>
> To avoid too much lag I wonder if this would work.
>
> How about just skipping the firing of a plug... like an interupt.  You
> could detect rotation ratio front to back and if it is way out of sink
> you could interrupt the firing of the next plug?  Dont know if this
> mechanicaly would be detrimental.
>
> <SNIP>
> >I'm just thinking out loud here. Since you have maximum traction when
> >there's no wheelspin, maybe you could devise a system that compared the
> >rotation of the front and rear wheels and slightly backed off the
> >throttle if it detected any slipping, checked again and backed off if...
> >etc.