10 thoughts to “Fuel Injector Size Selection Guide”

  1. Will increasing the fuel injector size alone improve performance and add hp to my 1985 TPI Vette or does it require other significant modifications? (i.e: bigger cam, headers, pistons, valves, etc.)

    1. No, more fuel needs more air for example to produce more power. So without any other modifications it’ll make your engine run worse especially on a stock tune.

    1. The LS3 injector is shorter in length compared to a LS2 injector. FAST offers a injector spacer/extension kit “146025-KIT” that will allow for LS3/LS7 injectors to fit the LS2 intake. Your LS2 fuel rails will work correctly so all you need is the spacers and O-rings that are included.

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