This idea of mine has not been tried before actually, because the races in the past started at 4AM central Europe time (3AM UK time). I did a few of them but I was rather sleepy, especially if they were over 40 minute races.
UCT is GMT. During summer UK&Ireland are UCT+1 and Central Europe is UCT+2.
I think the events that start at 1AM UCT Sunday morning should be arrive and drives, no practice, hotlap qually, no warm up, and two short races of about 25 minutes each.
If 1AM UCT is too late for Europe then maybe 11PM UCT Saturday would be better (12AM UCT in the Winter after the clocks change).
To boost grids I suggest Race07 content only. I guess North Americans to not like twisty circuits but there used to be several of them in Mini Friday on twisty circuits and I think they enjoyed them.
I think the lowest common denominator is WTCC06/07 on Race07 circuits circuits would be best but if that is too boring maybe WTCC06/07 and occasionally BMW Mini on download circuits (especially if Mini Friday grids get even smaller than they are at the moment).
Drag racing was mentioned. Now that would be a fun event: Anderstorp runway, cars with no sequential gearbox (Caterhams, WTCC87, GTR-Evolution production cars (Viper, Apollo, CCX (1000BHP 245MPH), Race On Muscle cars, Camaro Cup, retro Max, retro cool Volvo's and BMW2002, Toyota Levin mod, NEXTEL mod, TVR mod, Commodore V8's (
),
Escort V8's (
), Retro Plus (Escort and Fiat 131:
), Mercedes 300 SEL (
), Nissan Failady (
),
Nissan Skyline 2000 GT-R (
http://www.youtube.com/v/vXJDPjkMbsI).
Anderstorp should be wide enough for 4 or 5 cars and we could have heats and a final.
If Anderstorp runway is to short for drag racing we could use the Mulscane Straight from VLM Lemans 1977 (no chicanes).
We could do conventional drag racing or first to a set speed and then back to zero in the shortest distance (someone would need to be watching each car with HUD to show their speedometer).
We could have no flag rules and race from the start of the Mulscane straight then do a handbrake turn and back the other way.
One other thing we could do at 1AM UCT Sunday morning is mob another communities public server or have a Racedepartment open public server with an admin present to kick ban wreckers and noobs.