great Idea but there can only be 2 or so cars on course during the time trial. there should be as little or no passing (that would throw off the timers) if all the cars were on the track going all out that would be a road race. and then everyone would have to have roll cages and real race cars. that is what I'm trying to avoid.

a typical time trial is 3 laps combined. it keeps drivers within their limits because a spin ruins their time.. dead stop to finish 3 laps is your time. it's a little more challenging.