Is AJR planning on being back at PBIR this month? They were just testing there before Xmas. If there are actually 20 cars participating in the "open" portion of the testing, it seams that a two hour window (5pm - 7pm) may indicate a single pass by each car on each day.
It's not a window from 5 to 7pm, it's two sessions (per day), one at 5pm and one at 7pm.
Per the PBIR website...."The two-night event will feature side-by-side runs and a shootout between the two quickest Top Fuel Dragsters and the two quickest Funny Cars. Gates will open at 4 p.m. both Friday and Saturday with runs scheduled at 5 p.m. and 7 p.m. After the second test session each night the drivers will be available for autographs."