Indy 500

This year's Indianapolis 500 Race was won by Alexander Rossi driving a Honda - Photo by Parker Hall/The Open Wheel

Chevy engine turbocharger installation. Indy cars are powered by twin-turbocharged V-6 engines made either by Chevy or Honda. The Chevy engines are made in the UK, the Honda engines are made in California.

Steering wheels for race cars have evolved into their own species.

The way that Rossi won is going to have the racers replotting their strategies. Personally, I would like to see the race run with NO pit stops. Give each car 20 gallons of gas and let's see how far they get.
    For the 500, Indy cars consume about one ton of fuel. If they started with that much weight Indy cars would look more like pickup trucks. As an alternative, you could have all the fuel dispensed at the pit stops by one crotchety old geezer who can't be bothered. Only the drivers who can make him laugh would be able to get their fuel in  less than 15 minutes.
    Or, if you want some more excitement, refueling could be done on the fly by speeding tanker cars, much like fighter jets are refueled in flight. That would eliminate all those annoying pit stops for fuel.