Quote:
Originally Posted by chulooz
15%? - what is this a percentage of? How do you measure wheel spin in %?
'ideal' acceleration requires spin?  No, Ideally you want 0% spin, 100% go. |
Actually, he's right on this one. 15% seems a bit high compared to the numbers I've seen (which are more like 5-6%), but ideal acceleration does in fact require some slippage (although some of the wheel slip comes from tire deformation, and doesn't involve any wheelspin at all). As for what the percentage means? 100% slip would mean that the wheel speed would be twice the car speed (so for every revolution of your front wheels, your rears would spin twice). 5% slip means that for every revolution of your front wheels, your rears would spin 1.05 times. So, this optimum slip value is pretty small, and you won't really notice it if you are watching the launch. However, it is faster than no slip, and the only way to get this kind of ideal launch is with traction control.