Chevy Carburetor Tuning Tips - Dial In Your Carb
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Positioned next to the boosters in a Holley, the high-speed air bleeds allow further fine-tuning of the air/fuel mixture. The larger the bleed, the leaner the mixture, and the smaller the bleed, the richer the mixture. The only way to accurately gauge the effects of changing air bleeds is to precisely measure a motor's BSFC on a dyno. Likewise, since installing the wrong air bleeds can result in catastrophic engine failure, 99 percent of hot rodders are better off leaving them alone. In fact, Pro Systems says that customizing the diameter of the fuel passages is a far more precise and effective means of altering the fuel curve than changing the air bleeds. View Related Article
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