![]() It kills power and increases the risk of engine-damaging detonation. A slightly rich fuel mixture is necessary to make peak power, but if the A/F mixture is way too rich, excess fuel can wash down the cylinder walls and dilute the oil. The carburetor will also deliver the optimum air/fuel ratio throughout the engine’s RPM range to achieve peak horsepower and torque.Ī mistune, on the other hand, can create all kinds of problems. A good tune means the engine should start and idle without stalling, and respond instantly when the pedal hits the metal. You can build a killer motor using all the best parts and machine and assemble everything with the utmost care, but if it’s a carbureted engine and the carburetor isn’t set up or tuned right your killer engine may never live up to its full potential.Ī good carburetor tune can make an engine, while a carburetor that’s mistuned can literally break an engine. An engine only runs as well as it is tuned.
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