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Technical SBC 350 Tri Power

Discussion in 'Traditional Hot Rods' started by lilmo630, Feb 17, 2019.

  1. Dino 64
    Joined: Jul 13, 2012
    Posts: 1,695

    Dino 64
    Member
    from Virginia

    lothiandon1940 and OLSKOOL57 like this.
  2. carbking
    Joined: Dec 20, 2008
    Posts: 2,515

    carbking
    Member

    Smog emission requirements is probably the major reason for the elimination of factory 3x2.

    For aftermarket:

    If you are going for performance (remember, math and physics are your friends):

    3x2 work great on an inline six!
    4x2 or 2x4 work MUCH better on a V-8

    If you are going for looks...............................................??? I seem to remember an old saying about beauty being in the eyes of the beholder. There is probably at least one individual somewhere that thinks the Pontiac Aztek is gorgeous! ;)

    Jon.
     
    fourspeedwagon and Shadow Creek like this.
  3. IMG_1293.JPG
    3 holly 94's and it works great on my 283, a 4 barrel might be easier but does not look as cool
     
  4. c-10 simplex
    Joined: Aug 24, 2009
    Posts: 1,331

    c-10 simplex
    Member

  5. David Chandler
    Joined: Jan 27, 2007
    Posts: 1,096

    David Chandler
    Member

    My cousin ran 3 rochesters on a 265 Chevy back in the late 60's. It went like hell. But it had other modifications that helped use the extra capacity. He ran 3 ? on a flathead before that, and he liked them too.
    A single four barrel is probably cheaper and easier, but it doesn't look like triple carbs. Your choice.
     
  6. jimmy six
    Joined: Mar 21, 2006
    Posts: 4,544

    jimmy six
    ALLIANCE MEMBER

    3-2's look great on engines. I ran a set of 348 Chev's, an Edelbrock manifold on a 355 with a RV cam and it worked great. Started it with block off plates on the ends and made it ran perfect first. After, added the 2outers. If you end up idling on all three buy a Uny-Syn to get the idle correct, not needed if idling on the center only.
     
  7. InstantT
    Joined: Aug 15, 2012
    Posts: 651

    InstantT
    Member
    from SoCal

    Dang. Any for sale.
    I accidently sold a box of junky denso smog carbs at a yard sale for 20 bucks.
    Now I can't find my matched set of 2GCs.
    Pretty sure they were in there and I can't find a set for under 1k.
    I've never been more disappointed in myself.

    Sent from my LGLS992 using The H.A.M.B. mobile app
     
  8. Tri-power37
    Joined: Feb 10, 2019
    Posts: 258

    Tri-power37
    Member

    This tri power set up was built by Delbert Allen about 8 years ago it was about 1300.00$ at the time - it is a lot of money. But if you factor in the cost of the manifold, the core carburetors, the speedway style bases, the nice fuel block and polished stainless lines, air cleaners with k&n filters, chrome thermostat and oil filler tube, gaskets and last but not least the knowledge and skill to put it all together to look like automotive jewelry and run like a champ! It is not a bad deal.

    6A976E29-DEF1-4A34-A236-E431F8DB2114.jpeg
    26B0A7B5-3BBF-48EB-99B4-A9FBEC874193.jpeg
    10F160CE-FED8-46AE-A945-997FF9E1B42D.jpeg
     
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  9. catdad49
    Joined: Sep 25, 2005
    Posts: 3,502

    catdad49
    ALLIANCE MEMBER

    Killer set-up, those valve covers are the icing on the cake!
     
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  10. manyolcars
    Joined: Mar 30, 2001
    Posts: 7,789

    manyolcars

    It's crazy to spend that much, then use those little highly restrictive air filters
     
  11. Tri-power37
    Joined: Feb 10, 2019
    Posts: 258

    Tri-power37
    Member

    The valve covers are OMC marine. And I installed a pcv valve on the inside of the right hand valve cover (facing the intake manifold). I used the rubber grommet that holds the pcv valve to hold a small hand made baffle on the inside of the valve cover. It works like a charm. I got the directions from a article in ol Skool rodz magazine. It is really hard to see unless you know it is there.
     
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  12. Dino 64
    Joined: Jul 13, 2012
    Posts: 1,695

    Dino 64
    Member
    from Virginia

    Here’s my set up from Dick York out of Houston[​IMG]


    Sent from my iPhone using H.A.M.B.
     
  13. catdad49
    Joined: Sep 25, 2005
    Posts: 3,502

    catdad49
    ALLIANCE MEMBER

    Nice, is this in your coupe?
     
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  14. Dino 64
    Joined: Jul 13, 2012
    Posts: 1,695

    Dino 64
    Member
    from Virginia

    Yup, finishing the chassis, body work this summer, paint in the fall and Jalopyrama next spring.
    At least that’s the plan, you how that goes :rolleyes:
     
    lothiandon1940 likes this.
  15. [QUOTE="Dino 64, post: 13107575, member: 191458"Jalopyrama next spring.
    :rolleyes:[/QUOTE].........................................Looking forward to seeing it. Excellent!
     
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  16. Dino 64
    Joined: Jul 13, 2012
    Posts: 1,695

    Dino 64
    Member
    from Virginia

    Thanks Don, gonna give it my best, stuff happens, hopefully I’ll be there
     
    lothiandon1940 likes this.

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