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Edelbrock C4B - what's the REAL scoop?

Discussion in 'The Hokey Ass Message Board' started by KustomRocket88, Jan 17, 2014.

  1. KustomRocket88
    Joined: Dec 12, 2009
    Posts: 291

    KustomRocket88
    Member

    Hello rodders, builders and whomever might be reading this post,

    It seems to be difficult to find much research on the Edelbrock C4B intake. What's the real scoop on this? When was it initially designed? I'm trying to keep every part 1966 on back because that's what I want to do. After hearing the design was influenced by the Z28 (which was a later deal), I'm starting to think I bought a mid '70s aluminum intake....am I better off to sell it and buy one that would've been used on a 283 back in the mid '60s at the drag strip? If so, what was typically run at the strip?

    This is a super broad question...I'm hoping some of you who did race back then or did go to the drags in the mid '60s can help me out.

    Thank you!
     
  2. slammed
    Joined: Jun 10, 2004
    Posts: 8,161

    slammed
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  3. KustomRocket88
    Joined: Dec 12, 2009
    Posts: 291

    KustomRocket88
    Member

    Thank you - wow great thread. I'm going to keep mine. Thanks!

    What would be the best carb someone might have run then - simple Edelbrock 600 cfm?
     
  4. KustomRocket88
    Joined: Dec 12, 2009
    Posts: 291

    KustomRocket88
    Member

    I'd ideally like to run a Carter, though I've heard Edelbrock is essentially a shiny Carter?
     
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  5. tjet
    Joined: Mar 16, 2009
    Posts: 1,272

    tjet
    Member
    1. Early Hemi Tech

    Look for an original early 70's Carter Competition Series. They are simple carbs with less stuff on it compared to a newer Edelbrock. The finish on them goes good with that vintage Edelbrock manifold.

    The p/n's are

    4758 - 500 CFM with manual choke
    4759 - 625 CFM with manual choke
    4760 - 750 CFM with manual choke

    4761 - 500 CFM with no choke
    4762 - 750 CFM with no choke

    Note, the non-choke ones were for 2x4 applications with the choke version as the back or primary carb

    Here's my 500's. 4758 rear, & 4761 front (matched set)
    Note: automatic choke on my back carb was added

    [​IMG]
     
    Last edited: Jan 17, 2014
  6. Shaggy
    Joined: Mar 6, 2003
    Posts: 5,208

    Shaggy
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    from Sultan, WA

    It should be noted it was changed a couple times to rotate the thermostat block around, i have 2 versions myself and one is going on my L79ish '65 el camino daily...
     
  7. tjet
    Joined: Mar 16, 2009
    Posts: 1,272

    tjet
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    1. Early Hemi Tech

  8. joel
    Joined: Oct 10, 2009
    Posts: 1,537

    joel
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    There was a Winters manifold on the 65 350 hp 327 and I think it appeared on the Corvette in 64. The 63 corvette Had a "high rise" iron manifold. The Edelbrock was first and the Winters was cheaper because you could get it from your local Chevy dealer.
     
  9. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,592

    HEATHEN
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    from SIDNEY, NY

    Actually, the first factory aluminum single 4 bbl intake showed up on the '62 327/340hp engine.
     
  10. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
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    from BC

    What I love is the guys on that thread questioning which chunk of cast aluminum, with no moving parts, is more "reliable". I can see it now, "Z-28 intake spontaniously combusts, tying up rush hour traffic for hours!! film at 11.":rolleyes:
     
  11. Shaggy
    Joined: Mar 6, 2003
    Posts: 5,208

    Shaggy
    Member
    from Sultan, WA

    If it runs super rich on a cylinder or 2 it'd be unreliable, and what about the 4x2 flattie mainifolds.... Oh and crossrams.... I wont deny that this shouldnt be a question with how many u-fabs ive seen
     
  12. The C4B is a later version of the C3B. The C3B is based on or copied from the early LT1 intakes. Drivability will be very similar with the "snowflake" Winters foundry, unit favoring lower RPM torque while the C3-4B intake favored higher RPM power.
    The only difference between the C3B and C4B is the notch in the plenum divider.
     
  13. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,385

    landseaandair
    Member
    from phoenix

    It goes back before the LT1, maybe way back. Could swear I've seen new product ads for the C4b from Hot Rod as early as '64/'65? Here's both the C4b (4 barrel) and C3B (3 barrel) in a 1967 Bell Auto catalog.

    DSCN6181.JPG

    DSCN6186.JPG

    DSCN6189.JPG
     
  14. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,385

    landseaandair
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    from phoenix

    And the C4B came first.
     
  15. slammed
    Joined: Jun 10, 2004
    Posts: 8,161

    slammed
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  16. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
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    from BC

    Ah...I see, so what you are saying is that if you dont tune the carbs on multi-carb manifolds properly they run rough at low rpm? Not sure what that has to do with reliability, or comparing one single four, dual plane intake with another, but ok....:D
     
    Last edited: Jan 18, 2014
  17. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 5,933

    56sedandelivery
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    I've got 2 different design C4B intakes; one is a "4 holer", the other has the more common plenum divider. The "4 holer" is older. The C3B and C3BX were for the Holley THREE barrel carbs, where the secondary was one large, somewhat oval shaped plate; that's the reason for the notch in the plenum divider. I'd say sell the GM snowflake, it's worth more than the Edelbrock, and get another C4B for the other engine. The snowflake intake will have an oil shield, whereas the Edelbrock does't. The earlier factory intakes were known for burning through the exhaust crossover passage, I don't know if that is true with the later intakes. The oil shield also collects sludge; they can be removed for cleaning however. Butch/56sedandelivery.
     
  18. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    The plenum divider C4B will out-perform the 4-hole at higher rpms, with very little sacrifice down low.
     
  19. tjet
    Joined: Mar 16, 2009
    Posts: 1,272

    tjet
    Member
    1. Early Hemi Tech

    You really cant go wrong with a 60's Edelbrock or Weiand. They fixed the problems with the factory intakes & added more volume to the runners.

    Here's a couple of pics of my old W-30 winters intake & an Edelbrock o4b.
    Take a look at the head flange difference...Way thicker on the Edelbrock.

    Btw, the Winters intake was made 9/69, & the o4b is from 7/67

    [​IMG]
    [​IMG]
     
  20. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    The C4B and C3B/C3BX are all down on power compared to a Z/28/LT-1 intake, but its a moot point, the Z/28 LT-1 intake didnt come on the scene till '67. The Z-28 intake will make virtually the same power as the Performer RPM.
     
  21. tjet
    Joined: Mar 16, 2009
    Posts: 1,272

    tjet
    Member
    1. Early Hemi Tech

    Basicly, it comes down to oil fill tube (pre 68) or no tube (post 68)
     
  22. slammed
    Joined: Jun 10, 2004
    Posts: 8,161

    slammed
    Member

    When parts are improved upon the originals, it goes without saying of superiority. Tuning, Time & dynos have put up the numbers. And the 100's combinations anyone can dream up out of boredom.
     
  23. KustomRocket88
    Joined: Dec 12, 2009
    Posts: 291

    KustomRocket88
    Member

    Thanks everyone for all your help, this makes much more sense now
     
  24. 350hp/327....factory 1966....?
     
  25. JeffB2
    Joined: Dec 18, 2006
    Posts: 7,814

    JeffB2
    Member
    from Phoenix,AZ

    Last edited: Mar 25, 2014
  26. no55mad
    Joined: Dec 15, 2006
    Posts: 1,828

    no55mad
    Member
    from nipomo, ca

    Works good (C4B) on the 327 in the 55 with an Edelbrock carb.
     

    Attached Files:

    Last edited: Mar 26, 2014
  27. C4B=Chevy 4BBL and C3B= Chevy 3BBL
     
  28. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,385

    landseaandair
    Member
    from phoenix

    Thumbing through some "new" old mags and spotted this in a December 1965 Popular Hot Rodding.
    016.jpg
    Looks to be a misprint in the ad (C-48), Intake is marked C4B.
     
  29. porknbeaner
    Joined: Sep 12, 2003
    Posts: 41,401

    porknbeaner
    Member

    Maybe the Z-28 intake was influenced by the CB4 :D
     
  30. DDDenny
    Joined: Feb 6, 2015
    Posts: 12,930

    DDDenny
    Member
    from oregon

    Correct, 1967 also, I have one (NOS) casting # 3890490 327 2.jpg
     

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