Fuel Injection - Pure-Pontiac EFI Buyer's Guide
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The base Butler Performance EFI system supports up to 650 hp and operates using the F.A.S.T. XFI ECU. The ECU uses two different strategies to calculate fuel and spark: speed-density and Alpha-N. Individual cylinder control is a feature that can be used with either of these strategies. A laptop is employed to alter the calibration through specific user-friendly software. View Related Article
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