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Nitro Tech

Nitro Engine Barrel or Metering Valve.

This is a barrel or metering valve. The barrel valve on a nitro engine is the main metering device between the fuel pump and engine. Its purpose is to ensure the engine receives fuel at the same time that the “butterflies” on the injector are opened. When this happens, the supercharger is forcing an incredible amount of air into the engine. The barrel valve allows the correct fuel volume for the most efficient combustion; therefore the nitro engine produces the maximum amount of horsepower to propel the dragster or funny car to the incredible speeds and low elapsed times that you see today.

Nitro Fact: Unlike racing gasoline, nitro carries its own oxygen and requires a nearly equal 1.7:1 air/fuel ratio. Compare that to a racing gasoline burning supercharged engine that will require a 11.5-12.0:1 air/fuel ratio.

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