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01-29-2008 06:17 PM #1
Requesting Info: Tuning Autolite 4100 Carb
I am trying to Tune my Carb, Just installed it in my 1962 Mercury Monterey S 55.
I have found an article online that fits the picture but gives no specifics on how to tune it. The article was in a Good magazine, and discussed tuning the carb by Pony Carb specialists. Its main purpose, as I read was to advertise Pony carbs tuning results, not how to.
Still it never explained Idle speed, Fuel mixture, or Choke adjustment I have a 390, with an Autolite 4100, just had the heads redone,new valves with hardened seats etc., I have installed Petronix electronic ignition in a rebuilt Distributor from Mac's auto parts.
Any info would be much appreciated, and no, I am not looking for comments on how lame I am. I already know I am CPU illiterate and have difficulties with Ford FE engines. (Who knew that the Right Bank was numbered 1-4?)
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01-29-2008 06:37 PM #2
Idle speed, if it's an automatic would be around 800 rpm. Best to set the idle mixture screws using a vacuum gauge, go for the max vacuum, then reset the idle speed to around 800. Choke should be adjusted so the spring tension is just enough to hold it shut when the engine is cold, and ensure it goes fully open when the engine is warm. Hope this helps.
PS, the firing order is as it should be----not jumping back and forth from side to side as some misguided manufacturers do!!!!!!!Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
Learning must be difficult for those who already know it all!!!!
You're welcome Mike, glad it worked out for you. Roger, it's taken a few years but my inventory of excess parts has shrunk a fair bit from 1 1/2 garage stalls to about an eight by eight space. ...
1968 Plymouth Valiant 1st Gen HEMI