What does "Top Fuel" mean in car racing terminology?

[the_same_mountainbike]

@keith

Edit: because of the explosiveness of this fuel, the lifetime of these engines is only about a mile. Then they have to be replaced.

Also, NHRA requires these engines to be torn apart and rebuilt after every single run. It takes a good crew about 45 minutes to do this, (there’s a maximum allowed by the NHRA, but I don’t remember what it is) but the engines and cars are designed to accommodate this activity, the crews are highly experienced engineers who train to do this, the “kit” is already organized and ready, and there are fewer systems in the car to interfere. But damn, these guys are GOOD!