Heat riser valve delete * UPDATED 6/28/2020*

Discussion in 'Small Garage Products and Services' started by Hector, Jun 7, 2009.

  1. Hector

    Hector '79 Buick Limited

    I did not have a NH manifold to compare when I was making these.I don't know the spacing for the studs on the NH ,the overall length or thickness of the part may be different,I just don't know.Can you PM me the dimensions from your valve?
  2. william.ali.kay

    william.ali.kay Needs more cowbell!

    Any update on fitting the 401?
    Still avalible?
  3. Hector

    Hector '79 Buick Limited

    I still have a few of the parts left but no idea if it will fit the NH exhaust.
  4. bhambulldog

    bhambulldog 1955 76-RoadmasterRiviera

    It would be good to know; if, this will fit 322 and/or other nailheads.
    I need to replace the gasket at the Roadmaster's Y pipe. I would like to get rid of the flapper at the same time.
    Will I be the guinea pig?
  5. william.ali.kay

    william.ali.kay Needs more cowbell!

    Either you or me.
  6. Hector

    Hector '79 Buick Limited

    You guys need to get measuring,the big one is the stud spacing and the size of the stud.The other critical dimension is the overall thickness of the part,that will determine if it is a direct swap without altering the stock geometry(as my parts are for the 430-455,350).
  7. bhambulldog

    bhambulldog 1955 76-RoadmasterRiviera

    It won't work on the 322". The 322" flapper assembly is integral to the exhaust manifold.

    Now, I know the 401 uses a different manifold from the 322. So, will it work on the 401? :Do No:
  8. Gary Bohannon

    Gary Bohannon Well-Known Member

    I have always hated those stupid things. I woud tap them open and wire them snug, never to move again. Sometimes I would take them apart and cut them out and drive soft bolts into the shaft holes.
    I had a machinist make me one, very similar to the ones shown above. I have it on my 67 GS right now.
    They really are bad on your car when stuck. Blocks almost all the driver side exhaust and forces it through the intake, super heats the poor ole carburetor and exits into the right side exhaust manifold.
    Imposible to get power & gas milage,
  9. JSteele

    JSteele Well-Known Member

    I machined the boss down on one years ago (don't remember if it was a buick) and drilled and tapped the hole for an O2 sensor.
    Max Damage likes this.
  10. Race Lutz

    Race Lutz Well-Known Member

    A bump for Hector............
  11. mkeeler

    mkeeler Old car guy

    Do you still have any of the spaceres left. I am interested in one.
    Thanx Mike 772-834-6999
  12. Hector

    Hector '79 Buick Limited

    Yes,I still have some left.PM me with any questions and a shipping address.
  13. Bobbyg

    Bobbyg Bobbyg

    I am in need of a Heat Riser Replacement or "spacer". I saw your post and would sure like to have one. I have tried every where I can think to find something to work. Can you help me??

  14. Bobbyg

    Bobbyg Bobbyg

  15. Bobbyg

    Bobbyg Bobbyg

    Hey Hector,
    I need one of your Heat Riser Delete units. Let me know how to get one sent to me. My Heat Riser is shot and this seems like a great solution.


    Bob Runner
  16. Hector

    Hector '79 Buick Limited

    Bob,sorry about the delay responding,I've been on vacation and just got back.I will PM you with the details shortly.
  17. Bobbyg

    Bobbyg Bobbyg

    Thank you.

  18. wedunit

    wedunit Wedunit

    Hector, I pm'd you with a request for a heat riser delete for my 430 earlier this afternoon.



    Last edited: Jul 13, 2011
  19. chucks71

    chucks71 Well-Known Member


    Any left for the 350? I pm'd you a few weeks ago with no response back. Let me know....

  20. 71Custom

    71Custom Active Member

    I would also like one for a 350 if you have any left?

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