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Technical Carter AFB flow ratings

Discussion in 'The Hokey Ass Message Board' started by carbking, Dec 2, 2021.

  1. carbking
    Joined: Dec 20, 2008
    Posts: 3,292

    carbking
    Member

    Some time ago, I posted venturii area for Carter WCFB carburetors. Since then, I have searched the Carter documentation in my possession to do the same for genuine Carter AFB carbs.

    The focus of this article is ONLY on genuine Carter AFB carbs; the modern imitations are not considered regardless of if they are marked Federal Mogul / Webber / Edelbrock / or even Carter. Yes, Federal Mogul tried to market some that were marked Carter, but Carter distributors refused to sell the watered-down versions! If you like the imitations, fine; but I will not even attempt to research them.

    I have totally given up on trying to place a formatted article here, and the site would time out if I attempted to type an article of this length. Thus, I have placed the article on my website with a link:

    https://www.thecarburetorshop.com/AFB_flow_ratings.htm

    Comments are welcome.

    I triple-checked my data, but even so, with this much data, there is probably at least one error somewhere. I have no ego. If one finds an error that can be documented, I will be more than happy to correct the article.

    This will be the last of these articles on Carter 4-barrels. Virtually all of the O/T thermoquads have published data, as do the equally O/T AVS units.

    Jon.
     
    Papas32, theamcguy, Bob Lowry and 6 others like this.
  2. Tman
    Joined: Mar 2, 2001
    Posts: 36,064

    Tman
    ALLIANCE MEMBER

    Good info, I was just looking for this.
     
  3. saltracer219
    Joined: Sep 23, 2006
    Posts: 881

    saltracer219
    Member

    Thank you for this great info Jon, it is much appreciated.
     
  4. carbking
    Joined: Dec 20, 2008
    Posts: 3,292

    carbking
    Member

    I was disappointed that Carter did not publish catalog pages on the Studebaker AFB carbs, just TFN's. If anyone has any Studebaker literature that can add this, I would appreciate it.

    Jon.
     
    loudbang likes this.

  5. Great information Jon. Thank you
     
  6. alphabet soup
    Joined: Jan 8, 2011
    Posts: 1,728

    alphabet soup
    ALLIANCE MEMBER

    Thank you again. You ARE the King of Carter carbs. Gene.
     
    28rpu likes this.
  7. lippy
    Joined: Sep 27, 2006
    Posts: 6,116

    lippy
    Member
    from Ks

    Thankyou. So much help in identifying carb numbers. Great!!! Lippy
     
  8. Thanks for the info !
     
  9. alphabet soup
    Joined: Jan 8, 2011
    Posts: 1,728

    alphabet soup
    ALLIANCE MEMBER

    Jon, is there a real way to determine the correct step-up springs for an application?? Thanks, Gene.
     
    57 Fargo likes this.
  10. carbking
    Joined: Dec 20, 2008
    Posts: 3,292

    carbking
    Member

    Gene - if basically an un-modified original application, look up the springs in the original bill-of-material.

    If not stock, then START with the original calibration, and tune from there.

    Jon.
     
    alphabet soup likes this.
  11. bchctybob
    Joined: Sep 18, 2011
    Posts: 3,623

    bchctybob
    ALLIANCE MEMBER

    More great info, thanks Jon.
     
  12. alphabet soup
    Joined: Jan 8, 2011
    Posts: 1,728

    alphabet soup
    ALLIANCE MEMBER

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