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Technical Little help with SBC blower

Discussion in 'The Hokey Ass Message Board' started by Barn Hunter, Nov 4, 2019.

  1. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
    Member

    I just got a car delivered today with a SBC (pictured). I've never owned a blower motor before and if you can tell me what I've got, I'd appreciate it. It was supposedly raced in the mid 70's...not with the big boys, but for fun. Been sitting for many years. Thanks! 20191104_172038 (2).jpg 20191104_172048 (2).jpg 20191104_172113 (2).jpg
     
  2. Hombre
    Joined: Aug 22, 2008
    Posts: 851

    Hombre
    ALLIANCE MEMBER

    Well it looks like a old 371 GMC blower with the long drive. Interesting and still out there if you are inclined to look.
     
  3. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 7,626

    mgtstumpy
    Member

    Wow, you don't see many of those mini blowers compared to the more common 4-71. Double Cragar V-drive and drive snout on an original SBC [Cragar] blower intake. Rare to me! What's the list on the Holley 4b? Does it run?
     
  4. Fordors
    Joined: Sep 22, 2016
    Posts: 2,220

    Fordors
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    From the looks of the choke plate that is a three barrel. Holley made them in 950 and 1050 flow ratings.
     
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  5. chevy57dude
    Joined: Dec 10, 2007
    Posts: 5,041

    chevy57dude
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    Cragar blower drives are as traditional as it can get! Choke tower milled off the DP?
     
  6. DDDenny
    Joined: Feb 6, 2015
    Posts: 12,377

    DDDenny
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    from oregon

    ^^^^^^^^^^^^^^
    What they said.
     
  7. 26Troadster
    Joined: Nov 20, 2010
    Posts: 507

    26Troadster
    Member
    from Texas

    single vac sec carb on a blower, that is a first for me as well as the blower. i love the hamb, you never know what you'll see.
     
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 43,685

    squirrel
    Member

    wow, that's an oldie! And even has a generator, still.

    What are your plans for the car, or the engine? without knowing more about the car it's hard to make any suggestions, but hopefully it'll get out in the public so folks can see it....
     
  9. Also, those are backward slash M\T valve covers, not M/T. o_O
     
  10. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    It does not run. It has been sitting for probably 30 if not more years. Here's a pic of the Holley. 20191105_100729 (2).jpg 20191105_101351 (2).jpg
     
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  11. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
    Member

    Sorry...this is new to me. What's the DP?
     
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  12. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    Hi Jim.
    It will definitely get out into the public. I've got to keep it under wraps for now....working on final paperwork. The block is a V0703JTB. Heads are 340292. I can see valve guides but just got it yesterday and haven't gotten into it.
     
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  13. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    Well that's cool. Didn't notice that before. Does that date them to a period?
     
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  14. 1ton
    Joined: Dec 3, 2010
    Posts: 324

    1ton
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    throttle linkage does not seem to have a lot of movement and whats with that little cable on the top of the carb
     
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  15. squirrel
    Joined: Sep 23, 2004
    Posts: 43,685

    squirrel
    Member

    DP=double pumper. The three barrel Holley is a neat carb, don't see them much these days. Notice the vacuum secondary vacuum assembly is larger than on "normal" vacuum secondary Holleys.
     
  16. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    Top. Sorry these pics aren't clear, it's in the back of the garage for now. 20191105_101148 (2).jpg
     
  17. saltflats
    Joined: Aug 14, 2007
    Posts: 9,561

    saltflats
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    from Missouri

    That is a 1050 Holley 3 barrel.
     
  18. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    Thanks!
     
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  19. 1ton
    Joined: Dec 3, 2010
    Posts: 324

    1ton
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    Old school cool
     
  20. Fordors
    Joined: Sep 22, 2016
    Posts: 2,220

    Fordors
    Member

    The small cable is the link between the choke plate and the mechanical choke linkage seen on the side of the carb.
    And as @saltflats said it’s a 1050, the secondary down tubes with no venturi boosters give the extra 100 CFM .
     
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  21. alchemy
    Joined: Sep 27, 2002
    Posts: 14,402

    alchemy
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    Is that engine in an early Vette?
     
  22. squirrel
    Joined: Sep 23, 2004
    Posts: 43,685

    squirrel
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    the JTB suffix sounds kind of weird....I'd sure like to see the stamping on the block, and maybe know what the block casting number is.
     
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  23. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
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    Sorry, that's TJB...I believe a 73 truck block
     
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  24. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,104

    Barn Hunter
    Member

    Hmmm.... might be.
     
  25. squirrel
    Joined: Sep 23, 2004
    Posts: 43,685

    squirrel
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    I suspected it might have the letters transposed.
     
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  26. porknbeaner
    Joined: Sep 12, 2003
    Posts: 41,135

    porknbeaner
    Member

    Jim
    I have never played with a vac secondary carb on a blower seems like you would have to have one helluva spring in the vac pod or it would be all in whenever the blower was sucking. I guess on a race motor that would not be a bad idea.
     
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  27. squirrel
    Joined: Sep 23, 2004
    Posts: 43,685

    squirrel
    Member

    Air is air....I doubt it would ever open the secondary all the way, judging from the size of the blower.

    But I could be wrong.
     
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  28. el Scotto
    Joined: Mar 3, 2004
    Posts: 4,168

    el Scotto
    Member
    from Tracy, CA

    That is wickedly cool looking!!!
     
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  29. I would not try to start it until you fixed and replaced a few things.
    The power valves, secondary diaphragm, you have a fuel leak at the carb line fitting. Make sure the distributor advance is freed up. Lots of rare pieces.
     
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  30. DDDenny
    Joined: Feb 6, 2015
    Posts: 12,377

    DDDenny
    Member
    from oregon

    Never had a three barrel but I'd sure be nervous about that little crimp end on that choke cable coming loose and going through the blower.
     
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