Ok, Heres some info i picked up recently that applies to both nitro and electric touring R/C
for on road (tarmac) racing, you need a maximum of 1.5 Deg toe in (wheels pointing inward at front).
The maximimum camber should be 1.8 degrees either negative (pointing in at top of wheel) or positive (pointing out at top of wheel).
HOWEVER, the above varies during wirther conditions and/or track surface quality. It can also (though not by much) be reliant on ride height.
TOE IN:
This is basically what keeps the vehicle in a straight line when set correctly. As in 1/1 this is critical. If the vehicles steerable (usually only two and always at the front) wheels have no toe in, then the vehicle will "Wander". The toe in, is also helped by the camber of the wheel. When these two intricate settings are perfect, then the wheel will feed itslef onto the suface in such a way as to "Grip" it, therefore aiding the car in "Tracking" in a straight line and helping he vehicle corner at speed. The rear wheels (driven or undriven) have a standard setting usually un adjustable, but set specifically to aid road handlig similar to that of the steerable wheels.
When applied to R/C model vehicles, these settings can (and often are) used at the rear of the vehicle also.
All of the above applies to 2wd or 4wd vehicles.
In off road running for say.. a buggy, these settings can also be utilised, but only where this is an included setup option can it be utilised at the rear.
