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Re: Holley Idle Feed Restrictor Mod
Quote:
Originally Posted by brad07
i've had to deal with an engine like that.
you could watch it on the AFR gauge we use. very slighty throttle opening and the gauge would climb to to 16.5:1 and POP and the engine would stall.
2 thou on the IFR and the problem was solved. though it did mean taking half a turn from each idle mixture screw. (two corner idle, 1850)
though this was a last resort. as we'd had similar problems with the same modle of car caused by the ignition system so we went down that path first
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Yes, that is the correct condition a larger IFR size will fix, just when the throttle plates are barely opened by the pedel. But, usually only on the edge of stalling, you had it bad....Also sounds like you did the correct upstep in the size too, because that is just about how much you need to take out of the idle misture screws.
My current engine, and probably 3 others are the only times I needed to do this. The others were not my engines.
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