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poly motor carb info needed

Discussion in 'The Hokey Ass Message Board' started by goon56, Dec 18, 2010.

  1. goon56
    Joined: May 31, 2008
    Posts: 232

    goon56
    Member
    from new jersey

    workin on a late series 1955 dodge truck. still can't pin point if it's a 260 or 270 poly. have read and heard the dodge did the 260 and that plymouth did the 270 and visa versa. either way, the motor has been bored 30 over, and the heads have had been ported and had a three angle valve job. stock cam. currently running the stock 2bbl ww stromberg, and it seems like it could run better. anyone know what the stock cfm is? and anyone have any ideas on a better or slightly bigger two barrel four bolt carb i can use for my engine set up. engine is assumed to be around 200 210 horse in this configuration
     
  2. dave s
    Joined: Aug 2, 2005
    Posts: 354

    dave s
    Member

    from 55 it should be the 260, i think the 270 was 56. i had a two bbl 500cfm holley on a 56 270 and it ran great. i had to use an adapter though... i also had a stock 55 260 with dual 2bbls, and it ran fantastic with the two carbs.
     
  3. goon56
    Joined: May 31, 2008
    Posts: 232

    goon56
    Member
    from new jersey

    the owner would like to run the dual carbs someday, but the intake and extra carbs aren't in the cards right now. 500 cfm seems like a bit much to me though.
     
  4. George
    Joined: Jan 1, 2005
    Posts: 7,336

    George
    Member

    260 is a Ford, it'd a 259.
     

  5. Willy301
    Joined: Nov 16, 2007
    Posts: 1,426

    Willy301
    Member

    can you rejet the carb on it to see if a bit more fuel helps?
     
  6. carbking
    Joined: Dec 20, 2008
    Posts: 2,915

    carbking
    Member

    The passenger 270 utilized a 4 barrel that was somewhat larger than the 500 CFM two barrel. Remember how CFM is rated:

    http://www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm

    Jon.
     
  7. 73RR
    Joined: Jan 29, 2007
    Posts: 6,474

    73RR
    Member


    Use a B&B off of a 318. Plenty of air.
     
  8. goon56
    Joined: May 31, 2008
    Posts: 232

    goon56
    Member
    from new jersey

    good info. anyone know what the cfm of the stock carb i'm using is?
     
  9. goon56
    Joined: May 31, 2008
    Posts: 232

    goon56
    Member
    from new jersey

    b&b off a 318?
     
  10. 73RR
    Joined: Jan 29, 2007
    Posts: 6,474

    73RR
    Member


    Carter Ball and Ball. Basic 2-bbl on most 318's in the 60's and 70's

    .
     
  11. George
    Joined: Jan 1, 2005
    Posts: 7,336

    George
    Member

    Dodge & Plymouth had 241(Dodge hemi only) & 270, 259 is Plym only in cars & Dodge in trucks.
     
  12. goon56
    Joined: May 31, 2008
    Posts: 232

    goon56
    Member
    from new jersey

    so anyone know what the stock 259 poly carb cfm was?
     
  13. 35desoto
    Joined: Oct 6, 2009
    Posts: 760

    35desoto
    Member

  14. carbking
    Joined: Dec 20, 2008
    Posts: 2,915

    carbking
    Member

    Guesses abound, but the actual number was never published.

    Jon.
     
  15. Abomination
    Joined: Oct 5, 2006
    Posts: 6,701

    Abomination
    Member

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