I know this thread isn't up to date but.
I ran 2 cars on 10ft lenth though. Not enough space for 20ft.
I ran 2.70 seconds with red zz gears and a 2.6 motor
then I ran my crappy car that I run on baby powder with stock rims and a 2.2 motor: 2.80
I ran both of them a couple of times and came up with these averages.
both cars are microsizers
________
CROWN VICTORIA