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Old 10-17-2012, 08:34 AM
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decooney decooney is offline
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Join Date: Nov 1999
Location: Folsom, CA
Cobra Make, Engine: ERA 623, 427 S/C Cobra. Ford FE 428 Cobra Jet, Ford Nascar TL 4speed - with a touch of raw; "less is more" theme
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John,
Sounds like you are done with it, but I only had one last thought - back to my original question when you started with the new carb. In any of your conversations with Phil at Quickfuel did he ever recommend increasing the size of the idle feed restrictor jets for the transition circuit? I realize you bought an HR series carb vs. a Q series version but don't know if the HR has the adjustable metering blocks or not since I don't mess with the HR versions carbs. The only reason I ask at this point is purely for reference and notes.

Note: this was the fix on my buddies QFT carb after working through it with QFT techs. Changing primary/secondary jets, acc pump cams, air bleeds, power valves, all had nothing to do with getting his setup to run clean below 2500 rpms at cruising speeds. It was those darn idle feed restrictors that allowed more fuel at slow cruising speeds and resolved the "stumble off idle" issue which is your original post for this thread. Its a bummer you did not get a chance to try the Q series carb.
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Last edited by decooney; 10-17-2012 at 08:38 AM..
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