Aaand here we go kids, history lesson time.
From 1911ish-1950 the Indy 500 was an open invitational, when it was dropped in 1960 from the f1 calendar, it became its own entity. Back then, unlike europe, F1 was the only single numbered formula which had been running in north america, which at the time ran IIRC up to 5.0l displacement. ALMOST EVERY other formula in north america (so not F2 and F3) from the era was running on displacement, F2000, F3000, F5000. These cars ran under USAC. So when I say I have a list of F1 drivers coming down and coming up from IRL in the 60s and 70s, I really mean, under the licensed racing of USAC, which was pre-cart (formed in 1978-1979 or something) at the time. I'm pretty sure that's common sense.
So yes, Mark Donohue, Mario Andretti came UP from 'Indycars' or 5.0l, Champcars, USAC cars, or modified F5000 cars. Whatever the hell you want to call them, they started the indy 500 BEFORE their F1 career when the Indy 500 was on the USAC schedule, and since CART obtained the rights of USAC, there are two drivers who came UP from Indycars to F1. Another notable driver, if thats not sufficient, is Jaques Villenueve (Who won the 1995 CART championship BEFORE his F1 start) and Juan Pablo Montoya
Drivers who came down from F1 to Indycar racing are Reubens Barrichello, Nigel Mansell, Emerson Fittipaldi....
Edit: Not to mention theres a few drivers who ran F1 alongside AAA/ USAC, including Graham Hill.
I'm rather surprised, since these are big names, I was asked for a list.
Last edited by Shinzah; 1 April 12 at 06:19.