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Throttle Body

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Oversized throttle bodies are one of the hot spots for many EFI tinkerers. A bigger hole can suck in more air, but the extra air is only useful if you have the extra fuel to go with it. At lower rpm, you don't necessarily gain anything but you won't get the "soggy bottom" conditions found when you install a larger carburetor. The larger throttle body does offer enhanced upper-end performance, but if the injectors run out of flow first, you can create a deadly lean condition, so higher-flow injectors should be considered if a substantially larger throttle body is installed.