Thread: 1990 chey pick up 4x4
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01-23-2011 05:35 PM #5
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with the TBI you can not run a big cam you must have good idle a round 500 rpm and good VAC if not if may idle like a top fuel digger .from all i know and i have talk to many the MAP just can not work right with much of any size cam over stock cam. i did the same build over a year ago for a 350 roller with vortec heads. i seen guys try to use the TPI 350 cam and that would not work right. so i had Erson grind a roller cam i built some 4.3 TBI s they just will not take any cam .i do not know of any one that can trick the map and make computer work goodLast edited by pat mccarthy; 01-23-2011 at 06:16 PM.
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
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