[Chris1529]

Its a little hard to give a definite answer on this because of factors such as car count, 1/8 vs 1/4, weather, etc.

Generally, they give 2 time trials on Saturday starting at 9 am. Figure about 2-2.5 hrs per round of TT's. Figure TT's over between 2pm-3pm. First round usually starts pretty soon after that.

Sunday, I think TT's start at 930. First round usually around noon.

of course weather and any problems can severely change schedule.

At Richmond on year, they got rained out on Sat. On Sun, gave a tt. Then first round sat race (ladder) , first round Sun race ( random pairings), 2nd rnd sat, 2nd rnd Sunday.

I am sure other situations have dictated both races run Sat or start Sun race sat night as well.