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Author Topic: FMU calibration question... ShowRoomStang ¯ Member # 1713 posted                              i have an A trim vortec and i have the 19#lb injector fmu calibration but i have 24#lb injectors... is it really necissary to get the right callibration? cuz i blow a fair amount of black smoke right now and is this making me slower by having the wrong calibration? also i have stock heads and REALLY want new ones but dont know what to buy... i have an E cam, Eddlebrock rpm upper and performer lower, #24 injectors, 5psi charger, and about every bolt-on...what heads would be best 4 me??? -------------------- I have THE FASTEST "A" Trim car in the world!!! Posts: 18 | From: Brentwood CA | Registered: Aug 2002  |  : Stimson _ Member # 51 posted                              Yes, your FMU is spiking up the fuel pressure too much and causing you to run rich under boost. This is costing you HP. You shouldn't have a problem finding a 19 lbs FMU, many people have them lying around after they've upgraded. Some TFS Twisted Wedge heads and a power pipe will really wake your 5.O up! Posts: 2373 | Registered: Jun 2000  |  :

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