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Technical Multi Carb Setups -Let's see 'em!

Discussion in 'The Hokey Ass Message Board' started by pkhammer, Apr 11, 2020.

  1. pkhammer
    Joined: Jan 28, 2012
    Posts: 510

    pkhammer
    Member

    Let's see some pics of your multi carburetor set-ups. Tell us why you run 'em and how they run. Be honest about your experience with tuning and performance. I've always heard that it's easier to run a single 4 bbl and you get the best performance that way to boot. What do you have to say about that?
     
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  2. 4speed411
    Joined: Jun 8, 2013
    Posts: 272

    4speed411
    Member

    427 dual 500 Edelbrock carbs with rare finned aluminum drag boat IMG_20200331_161109.jpg scoops fitted with K&N filters...
     
  3. 40FORDPU
    Joined: Mar 15, 2009
    Posts: 2,799

    40FORDPU
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    from Yelm, Wa
    1. Northwest HAMBers

  4. egads
    Joined: Aug 23, 2011
    Posts: 691

    egads
    ALLIANCE MEMBER

    2 Twos on a 312.[​IMG]
     
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  5. clem
    Joined: Dec 20, 2006
    Posts: 2,850

    clem
    Member

    This is correct..........just doesn’t look as good !
     
  6. carbking
    Joined: Dec 20, 2008
    Posts: 2,783

    carbking
    Member

    Not pretty, as daily driver shop truck, carbs untouched for 21 years.

    Ford 390, 2 genuine Carter 625 CFM AFB's, solid linkage. Replaced single Carter 625 CFM AFB, which previously replace a Holley.

    Tuning: quite a bit, but I had expected that.
    Performance: first gear is now useless under WOT unless there is a significant load in the bed ;)
    Fuel economy: the single AFB DOUBLED the mileage from the Holley, the dual AFB's increased it another 6 percent.
    Impressions: one young whippersnapper (about 40) gave me the ultimate insult (unintentionally) when he asked where I got the fuel injection system for the FE engine! His face turned red when I opened the hood.

    May have a picture of '64 GTO tripower somewhere, but performance suffered dramatically versus the original 4-barrel, so don't have the pictures where I look at them often. Mileage was better.

    Jon

    [​IMG]
     
  7. kabinenroller
    Joined: Jan 26, 2012
    Posts: 443

    kabinenroller
    Member

    Preview of an upcoming engine.........
    6D43109C-17AD-4F92-98CB-128F5CDFBC09.jpeg
     
  8. clunker
    Joined: Feb 23, 2011
    Posts: 1,587

    clunker
    ALLIANCE MEMBER
    from Boston MA
    1. MASSACHUSETTS HAMB

    Life’s too short to take the easy path.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  9. Carbking,,,,,was that pic taken upside down on a lift ,,,,or underneath from a grease rack ?

    Tommy
     
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  10. clunker
    Joined: Feb 23, 2011
    Posts: 1,587

    clunker
    ALLIANCE MEMBER
    from Boston MA
    1. MASSACHUSETTS HAMB

    I have a Caddy 390, (I believe you are working on a Caddy 331). I found an OEM 55’ Caddy Eldorado dual quad set up cheap with correct original Rochesters and linkages. They were completely frozen, missing pieces and needed a lot of love and I needed to weld a crack in the manifold, but I rebuilt them and did eventually get them working well. I have been dialing them in over time, and every time I do something they run a little better. Right now they are T&A. They get about the same gas mileage as I did with a really nice OEM Single Rochester on iron intake that I also rebuilt, it doesn’t run as well as the single four barrel, but the fun for me is taking a dead 2X4, brining it back to life and running it on my daily driver. IMG_1949.JPG
    Also, my knowledge and skill is pathetic compared to virtually everyone else here, so if I can do it, chances are a toddler probably can too.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  11. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,053

    Moriarity
    SUPER MODERATOR
    Staff Member

    Horne 4x2 setup on the 49 331 caddy in my 40 ford coupe, 4 original chrome stromberg 97's with 41 jets. this thing runs as smooth as a gravy sandwich, Idles at 500 rpms and has great throttle response. I couldn't be happier with it

    BA38CCDB-0C57-48F5-8CCC-A0EBF2915F0D.jpeg 2635A6F7-63A9-436B-930A-8361EACD4A45.jpeg
     
  12. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,053

    Moriarity
    SUPER MODERATOR
    Staff Member

    Man a fre on my 61 corvette. 350 solid cam 4 speed. 4 rochester 2gc's with .049 jets. I screwed around quite a bit to get this to run right but now that it does ,it feels a lot faster to me than the 650 dp holley that I took off from it and I checked the gas mileage once last summer with a mix of freeway, around town and a fair amount of beating on it and got 17 mpg

    8E7685E2-FA34-4632-ADBB-55E580513F0E.jpeg CDFEA455-BAD1-44CF-9EAE-A546D76091CF.jpeg
     
  13. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,053

    Moriarity
    SUPER MODERATOR
    Staff Member

    Offy tri power with roch 2gc's on the 364 nailhead in my 55 chev.there is nothing like the "kick in the ass" feeling of the end carbs opening up.....

    D48F5FBF-CD23-41BE-BF8C-A0E7B549001F.jpeg BF42CF7B-2E69-4640-B8E3-15257DDCCFF6.jpeg
     
  14. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,053

    Moriarity
    SUPER MODERATOR
    Staff Member

    Edelbrock six deuce on the 348 in my 61 impala... this one is only running on the center 2 carbs, the rest are dummies... car runs good, .050 jets in the roch carbs and gets 22 mpg on a trip

    065E9229-838A-4962-9A32-AA2959E33BF5.jpeg CAD6F868-F067-45A3-8DCB-108CBC30E0F3.jpeg
     
  15. Rambler man Dan
    Joined: Mar 24, 2018
    Posts: 30

    Rambler man Dan
    Member

    20191231_122930.jpg twin 2 barrel progressive weber carbs on my wife's 63 chevy II
     
  16. carbking
    Joined: Dec 20, 2008
    Posts: 2,783

    carbking
    Member

    Quote "Carbking,,,,,was that pic taken upside down on a lift ,,,,or underneath from a grease rack ?

    Tommy" End quote

    I posted it wasn't pretty. Drive one daily for 21 years, and see how it looks ;)

    Probably out of place with all the pretty pictures being posted, but it does show a bit of reliability, and I am certainly not ashamed of it.

    As to the OP's questions:

    IF WE STAY TRADITIONAL - properly selected and tuned dual quads are going to out-perform a single 4-barrel.

    On the other hand, if anything goes, then dual quad intake development is pretty much non-existent over the last 50 years, as the demand for single quad intakes by lazy ;) individuals has become the norm. The better airflow of the modern single quad manifold is going to trump the better cylinder average fill density of the traditional dual quad (when compared to the traditional single quad).

    If I were 40 years younger, and Man-A-Fre made an intake for a Ford FE, I would love to play with it. In the baja boondocks of the Ozarks, I hadn't seen ANY Man-A-Fre until the last few years.

    Jon.
     
    Last edited: Apr 12, 2020
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  17. CobraJoe
    Joined: Mar 19, 2018
    Posts: 56

    CobraJoe
    Member

  18. pkhammer
    Joined: Jan 28, 2012
    Posts: 510

    pkhammer
    Member

    I just purchased a Offy 3x2 for my Caddy 331. I had planned to be one of the lazy guys and run a single 4 bbl but I saw where Speedway had the Offy on sale at a great price so I sprung for one. I have a few Holley 94's laying around and a couple of Stromberg 97's so I may go for the 3x2 setup. I am not a great engine tuner but hey, I have you guys to help me with that!
    FYI I also purchased a large lot of antique/classic auto parts from a defunct museum here in Va. and I have about 40 (yes forty!) new in the box Bendix/Stromberg WW carbs for various applications. I know some people like to tun these too.
     
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  19. jhexide
    Joined: Feb 23, 2012
    Posts: 326

    jhexide
    ALLIANCE MEMBER

  20. pkhammer
    Joined: Jan 28, 2012
    Posts: 510

    pkhammer
    Member

    @jhexide tell us what you're running there. Looks like fun!
     
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  21. jhexide
    Joined: Feb 23, 2012
    Posts: 326

    jhexide
    ALLIANCE MEMBER

    250 cu in chevy
    its a blast
    carter webber carbs
    cast iron exhaust
     
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  22. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 8,044

    mgtstumpy
    Member

  23. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 8,044

    mgtstumpy
    Member

  24. pkhammer
    Joined: Jan 28, 2012
    Posts: 510

    pkhammer
    Member

    For some reason I can't quit looking at that Chrysler Spitfire Poly Head!!
     
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  25. KoolKat-57
    Joined: Feb 22, 2010
    Posts: 2,947

    KoolKat-57
    Member
    from Dublin, OH

    latest shots 022.JPG My'57 Pontiac IMG_0227.JPG
    Matched set of old AFBs on the 392 Hemi in my '32 Roadster.
    KK
     
  26. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 8,044

    mgtstumpy
    Member

  27. GordonC
    Joined: Mar 6, 2006
    Posts: 1,987

    GordonC
    ALLIANCE MEMBER

    Moriarity you slay me man!
     
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  28. chevy57dude
    Joined: Dec 10, 2007
    Posts: 5,527

    chevy57dude
    Member

    IMG_20180506_170410940.jpg
    Boost referenced 950 Holley double pumpers, tuned on the dyno. Performance is inspiring to say the least.
     
  29. wvenfield
    Joined: Nov 23, 2006
    Posts: 5,074

    wvenfield
    Member

    Pontiac Gasser e 3.jpg

    I have no idea how they run yet (getting there). Why? No one ever asks people to post up their single carb set ups.
     

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