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Single carb upgrade for a 235?

Discussion in 'The Hokey Ass Message Board' started by Tugmaster, Jan 21, 2013.

  1. My 60 Belair is stock right now and has the original POS Rochester. I rebuilt it and it is "OK" but I know thier are better choices out there. I did some searches and it seems that some people go with the Holly/Weber from Langdons other seem to like a Carter YF. I did read Fathacks post about running a Holly one barrel but that particular model is tough to find.
    Does anyone know which model YF would be correct for a upgrade? There are alot of different ones.
    One of my big issues is gonna be underhood clearence. Not a alot of room on the 59/60 cars
    Thanks as always, Todd
     
    Last edited: Feb 26, 2013
  2. Truckedup
    Joined: Jul 25, 2006
    Posts: 3,985

    Truckedup
    Member

    Carter YF 2100 is correct for later 235.Should be a bolt on.The ones I used were manual choke models. I have personally used a 1904 Holley from a 60's 225 Slant 6 Mopar several times.The Holley requires some modification to the linkage for Chevy use. Both the Carter and the Holley were an improvement over a Rochester B in my opinion.The Holley is shorter than the B,the Carter a bit taller.
    Langdon,for single carb use, will try and sell you a Carter Weber or Holley Weber... I have heard several guys say these carbs reduce part throttle performance but increase top end....Tom admitted it himself...
     
  3. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,591

    HEATHEN
    Member
    from SIDNEY, NY

    What exactly is wrong with the Rochester? I know that they aren't a good choice for use on multiple carb setups, but you should be able to make it work right in a stock application.
     
  4. Grumpy
    Joined: Jan 28, 2003
    Posts: 2,569

    Grumpy
    Member
    from NE Ohio

    This is vague info, but I had a 54 Chevy in 2000 that had fenton headers, dual exhaust, pertronix ignition, and a machined adapter with a small 2bbl off what I was told was a ford. I honestly cant remember what carb it was, but..
    Ive had lots of inline cars, and that thing ran the best of all, hands down.

    Even when I traded the car for a Model A, the guy who got the car was shocked at how well it ran.
    And he has owned 100s of pre-60 cars.

    He and his son are HAMBers.

    And the car is now owned by a guy in Pittsburgh PA, and as far as I know is still running that set-up.

    Wish I could remember the details better. Sorry
     

  5. 3onthetree
    Joined: Feb 25, 2008
    Posts: 161

    3onthetree
    Member

    You must be talking about the 34/36 mm progressive 2 barrel. I use the 38/38mm Outlaw Webber 2 barrels (non progressive-both barrels open simultaneously) It really improved the 250 in my 63 Belair all around. I can barely tickle the throttle and it will pick up speed going up hill. I also have cast iron headers. They're expensive and a different animal to tune, as they have an idle air jet, idle fuel jet, main air jet and main fuel jet.
     
  6. carbking
    Joined: Dec 20, 2008
    Posts: 2,980

    carbking
    Member

    Carter YF carburetors produced for use on Chevrolet

    756s – 216 engine aftermarket 1937~1952
    787s – 216 engine aftermarket 1937~1952
    788s – 235 engine aftermarket 1950~1952
    789s – 235 engine aftermarket 1950~1952
    890s – 235 engine aftermarket manual choke (number assigned, no production)
    891s – 235 engine aftermarket auto choke (number assigned, no production)
    964s – 216 engine aftermarket manual choke 1937~1952
    965s – 216 engine aftermarket auto choke 1937~1952
    966s – 235 engine aftermarket auto choke 1950~1952
    967s – 235 engine aftermarket manual choke 1950~1952
    2008s – 216 engine aftermarket 1937~1952
    2046s – 206 engine aftermarket 1932~1936
    2100s – 235 engine aftermarket manual choke 1953~1956
    2101s – 235 engine aftermarket auto choke 1953~1956
    2104s – 261 engine aftermarket (number assigned, no production)
    3055s – aftermarket (number assigned, no production)
    3211s – 235 engine aftermarket 1957~1962
    3379s – 153 engine original equipment manual trans 1962~1966
    3402s – 153 engine original equipment auto trans 1962~1966
    3711s – 194 engine aftermarket 1962
    3760s – 230 engine (number assigned, no production)
    3770s – 230 engine (taxi) original equipment auto transmission 1964~1965
    3771s – 230 engine (taxi) original equipment manual trans 1964~1965
    3772s – 194 engine auto transmission (number assigned, no production) 1964
    3773s – 194 engine manual trans (number assigned, no production) 1964
    3821s – 194 engine (van) original equipment 1964
    3946s – 194 engine aftermarket 1964~1965
    3946s – 230 engine aftermarket 1964~1965
    3975s – 230 engine (van) original equipment manual trans 1965
    3976s – 230 engine (van) original equipment auto trans 1965
    4043s – 194 engine (van) original equipment manual trans 1966
    4043s – 230 engine (van) original equipment manual trans 1966
    4044s – 194 engine (van) original equipment auto trans 1966
    4044s – 230 engine (van) original equipment auto trans 1966
    4048s – 230 engine (van) aftermarket experimental 1963~1966
    4072s – 194 engine original equipment auto trans CALIF smog 1966
    4072s – 230 engine original equipment auto trans CALIF smog 1966
    4073s – 194 engine original equipment manual trans CALIF smog 1966
    4073s – 230 engine original equipment manual trans CALIF smog 1966
    4080s – 194 engine original equipment (pass) auto trans CALIF smog 1966
    4080s – 230 engine original equipment (pass) auto trans CALIF smog 1966
    4080s – 250 engine original equipment (pass) auto trans CALIF smog 1966
    4085s – 230 engine original equipment (truck) manual trans CALIF smog 1966
    4085s – 250 engine original equipment (truck) manual trans CALIF smog 1966
    4086s – 230 engine original equipment (truck) auto trans CALIF smog 1966
    4086s – 250 engine original equipment (truck) auto trans CALIF smog 1966
    4145s – 194 engine original equipment (truck) manual trans 1965~1966
    4145s – 230 engine original equipment (truck) manual trans 1965~1966
    4202s – 250 engine (taxi) original equipment auto trans 1966
    4203s – 250 engine (taxi) original equipment manual trans 1966
    4278s – (export to India)
    4339s – 194 engine aftermarket 1963~1967
    4339s – 230 engine aftermarket 1963~1967
    4339s – 250 engine aftermarket 1963~1967
    4367s – 230 engine original equipment manual trans CALIF smog 1967
    4367s – 250 engine original equipment manual trans CALIF smog 1967
    4368s – 194 engine original equipment auto trans CALIF smog 1967
    4368s – 230 engine original equipment auto trans CALIF smog 1967
    4368s – 250 engine original equipment auto trans CALIF smog 1967
    4369s – 230 engine original equipment (truck) manual trans CALIF smog 1967
    4369s – 250 engine original equipment (truck) manual trans CALIF smog 1967
    4370s – 230 engine original equipment (truck) auto trans CALIF smog 1967
    4370s – 250 engine original equipment (truck) auto trans CALIF smog 1967
    4371s – 230 engine original equipment (truck) manual trans CALIF smog 1967
    4371s – 250 engine original equipment (truck) manual trans CALIF smog 1967
    4371s – 292 engine original equipment (truck) manual trans CALIF smog 1967
    4372s – 250 engine original equipment (truck) auto trans CALIF smog 1967
    4373s – 153 engine aftermarket manual trans 1963~1967
    4374s – 153 engine aftermarket auto trans 1963~1967
    4375s – 230 engine original equipment (truck) manual trans 1967
    4375s – 250 engine original equipment (truck) manual trans 1967
    4376s – 230 engine original equipment (truck) auto trans 1967
    4376s – 250 engine original equipment (truck) auto trans 1967
    4377s – 250 engine original equipment (taxi) manual trans CALIF smog 1967
    4378s – 250 engine original equipment (taxi) auto trans CALIF smog 1967
    4387s – 194 engine original equipment (truck) manual trans CALIF smog 1967
    4480s – 230 engine aftermarket (all Federal) 1963~1967
    4480s – 250 engine aftermarket (all Federal) 1963~1967
    4492s – 194 engine aftermarket 1962
    6213s – number assigned no production


    Have fun!

    Jon.
     
  7. Thanks John. That info should keep me busy for a while!! Todd
     
  8. saltflats
    Joined: Aug 14, 2007
    Posts: 10,617

    saltflats
    Member
    from Missouri

    You my want to makr sure someone has not replaced that carb with one off a 216 thay are smaller.
     
  9. 'Mo
    Joined: Sep 26, 2007
    Posts: 7,432

    'Mo
    Member

    Bookmarked. Thanks!
     
  10. Truckedup
    Joined: Jul 25, 2006
    Posts: 3,985

    Truckedup
    Member

    The Rochester B worked well,but the YF worked better I thought. Sharper throttle response and a bit better fuel mileage. I've done it several times with the same results.
     
  11. KoolKat-57
    Joined: Feb 22, 2010
    Posts: 3,027

    KoolKat-57
    Member
    from Dublin, OH

    Years ago we machined the intake and welded on a plate that would accept an early Rochester 2 barrel from a 283. Ran great and wasn't really all that hard to do!
    Just a thought!
    KK
     
  12. ***UPDATE***

    After the inputs on here and a little more research on my part I figured the Carter 3211S was my best bet. I scored one off eBay. It is a direct bolt on with no clearance issues. The only major difference is the heat choke is on the rear of the carb as opposed to the forward end on the original Rochester. I got a rebuild kit from Mikes carbs and rebuilt it and added a manual choke to replace the heat tube one.
    WOW!!!! what a difference. Idles smooth as silk and no more flat spot!! I haven't taken it down the road yet but I know it is going to be a winner.
     
    Last edited: Feb 26, 2013
  13. Curt B
    Joined: Oct 15, 2009
    Posts: 325

    Curt B
    Member

    Not all that easy to do from the welding side of it. Soon I'll know how much it wants to pull from wall buildup and may need to do it while bolted to the head.
     

    Attached Files:

  14. That's some nice machine work! I couldn't get away with that on my car due do not a lot of hood clearance. I would definetly bolt it up before welding though. You going to tig it?
    Todd
     
  15. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    We had to run a 1bbl in a 6 cylinder oval tracker. After flowing all the carbs we could fine a Rochester 1B off a late 60s 292 flowed the best (more than some small 2bbls), was easy to tune, and had good throttle response.

    Hoop
     
  16. junkyardjeff
    Joined: Jul 23, 2005
    Posts: 7,836

    junkyardjeff
    Member

    Now that I have a extra 235 I am thinking about making a 2 bbl intake for one,I want to use a vintage 2 bbl like what was on the GM straight 8s so I can use my existing air cleaner.
     
  17. rocksolidnate
    Joined: Feb 4, 2013
    Posts: 121

    rocksolidnate
    Member
    from Viroqua Wi

    Nice adapter curt b should be a great improvement
     
  18. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    We ended up gluing popsicle stick 1/2s inline with the engine to get more fuel into the end cylinders. A lot of the fuel puddled on the floor of the manifold and the sticks would help with fuel distribution.
     

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