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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Autolite carb

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    9/30/2020 6:53 PM  #1

    Nos681
    Senior 24-7 FYI Addict

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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,336

    Autolite carb

    What is difference between 4100 and 4300?

     

    9/30/2020 6:58 PM  #2

    Toploader
    Senior 24-7 FYI Addict

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    Registered: 4/15/2013
    Posts: 1,640

    Re: Autolite carb

    From what I can tell, the 4300 is the evil twin of the 4100...
    https://www.carburetor-parts.com/Autolite-4300-Technical_ep_292.html
    I have the 4100 (rebuilt by Jon Earnhart - Pony Carbs) and it is a great carburetor.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
     

    9/30/2020 7:39 PM  #3

    Rudi
    Senior 24-7 FYI Addict

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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,976

    Re: Autolite carb

    The 4300 is an emissions era carb and one of the worst carbs ever to carry the Autolite name. It does not resemble the 4100 in any way shape or form. Stay away from it as if it was a carrier of the Wuhan Virus.
    The 4100 is arguably the best carb ever made regardless of brand. I had one on my 289, it was rebuilt by Pony Carbs (alas long gone) and was absolutely rock solid.

    Last edited by Rudi (9/30/2020 7:43 PM)

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    10/01/2020 5:29 AM  #4

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,502

    Re: Autolite carb

    If you must run an Autolite (or really any carb for that matter), the 4100 is the one to use.  A truly good design, and one of the Autolites that isn't terribly hard to get parts for, though I think you'll want to make sure you match the venturi size correctly to your application, or maybe its the boosters, either way, all 4100s are not the same.  Like any other carb its got to be matched to the engine. 

     

     

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