October '21

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48 THE SHOP OCTOBER 2021 PRECISION ENGINE think, 'I'm coming from a 650- or 750-cfm carburetor and that's too big.' The truth is that because the system is monitoring a host of engine operating parameters and forcibly injecting fuel, the signal—such as a carburetor requires at the boosters—isn't impacting fuel metering. A fuel injection system can flow significantly more air through the butterflies with no ill effects." Oberhelman cautions that, while impres- sive, fuel injection systems are not a magic bullet. On-Time Deliveries Shops should understand the latest developments in fuel injection so they can recommend the appropriate setup for each customer. (Photos courtesy Holley Performance Products)

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