Holley Carburetor Tuning - 10 Power Moves
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Shown here are the principle booster designs in use today. Number 1 is for carbs only and way too small for the engine, as it is a low-gain design. Number 2 is a popular style for an off-the-shelf street carb, but when stepped by undercutting, as in number 3, it really comes into its own as a race carb booster. Numbers 4 and 5 are high-gain boosters. Their use should be limited to cold weather and/or alcohol fuel. View Related Article
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