Top Fueler Info..

A top fuel dragster motor is a 500 cubic inch hemi engine.

Under full throttle, a top fuel dragster engine consumes 1.5 gallons (8litres) of nitro methane per second a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.

A stock dodge 426 cubic Inch Hemi v8 engine cannot produce enough power to drive the dragster’s supercharge. With 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into near solid from before ignition. Cylinders run on the verge of hydraulic lock at full throttle.

At the Stoichiometric 1.7:1 air/fuel mixture for nitro methane the flame front temperature measures 7050 degrees F.

Nitro Methane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, dissociated from atmospheric water vapour by the searing exhaust gages.

Duel magnetos supply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.


Spark plug electrodes are totally consumed during a pass. After ½ way, the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. Cutting the fuel flow can only shut down the engine. If spark momentarily fails early in the run unburned nitro builds up in the affected cylinders and then explodes with sufficient force to blow cylinders heads off block in pieces or split the block in half


In order to exceed 300mph in 4.5 seconds dragsters must accelerate at an average of over 4G’S. In order to reach 200mph well before half track, the launch acceleration approaches 8G’s.

Top Fuel engines turn approximately 540 revolutions from light to light.

Including the burnout the engine must only survive 900 revolutions under load. The redline is actually quite high at 9500rpm.

The bottom line assuring all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimated $1,000.00 per second.


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