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Hot Rods Stromberg 97 tuning ( AGAIN)

Discussion in 'The Hokey Ass Message Board' started by CheatersPete, Sep 22, 2021.

  1. CheatersPete
    Joined: Sep 25, 2002
    Posts: 1,279

    CheatersPete
    Member

    Hi all Hambers
    I'm struggling tuning my carburetors on my flathead, I'm using the O2 sensor, I have perfect idle mixture ( 13.8 to 14), and also very good at wide open ( 12) . BUT, when cruising I'm way too rich ( 9), plugs are fooling after 200 miles...

    I have try change the main jets, it is better but I'm loosing power at wide open and get a bit lean...

    Can someone assist me ? should I play with power valves ? how to play with the middle circuit ?

    thanks for your help
     
  2. have you talked to Clive at Stromberg? He is usually very helpful.
     
  3. CheatersPete
    Joined: Sep 25, 2002
    Posts: 1,279

    CheatersPete
    Member

    Clive is indeed helpful, unfortunately no answer on this...
     
  4. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 7,966

    Bandit Billy
    ALLIANCE MEMBER

    How many carbs are we talking about and are you using progressive linkage? I was having a very similar issue on mine a while back. I cured it by adding progressive linkage and dialing down the fuel pressure to 2.5 pounds.
     

  5. PM sent Pierre ;)
     
  6. CheatersPete
    Joined: Sep 25, 2002
    Posts: 1,279

    CheatersPete
    Member

    It is a stroked 284 flathead with Shneider 270F ( 395 lift) , scot blower with 2 big 97. direct linkage
     

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