How can a top fuel dragster burn so much fuel?

Top fuel dragsters have dual fuel pumps capable of pumping 77 gallons per minute. They use 22.75 gallons for warm-up, burn out, stagging and quarter mile run.

They can burn this much best the fuel Nitro methane burns at a air/ratio of 1.7:1 air fuel ratio, and most run the engine richer (1.1-1.4:1) and use the extra fuel to help cool the motor. So they run around 1.1 lbs of air to 1 lb of fuel, in an 8500rpm, 500cuin. engine running 45lbs of boost