Tick Under

Discussion in 'Mech Tech' started by MrDavo, Apr 28, 2023.

  1. Zed

    Zed Gradually getting grumpier

    :thumbsup:
     
  2. MrDavo

    MrDavo Supporter

    All sorted today, thanks to Zed!

    First he set the timing spot on, then took the linkage off and adjusted the throttle stops until we had a steady tickover with the least amount of shaking. Only then did he put the linkage back on, and adjusted until he got the same readings from his flow meter for both carbs.

    The van is now noticeably quieter and smoother. I filled her up and noted the mileage in the van notebook- it will be interesting to see how much mpg is improved, Zed said the exhaust smelled of fuel when we turned up. Covid seems to have killed my sense of smell forever, so don’t ask me!

    Thanks again, Steve.
     
  3. Zed

    Zed Gradually getting grumpier

    Nice to meet the Davos today, do some easy tinkering, spot of lunch - lovely.


    Timing was a couple of degrees too advanced, set that.
    Rough balance wasn't happening, more later
    Disconnect linkage one side
    Rough balance and slow it down on the stop screws... a lot
    Rough mixtures (one turned in about 6 turns, other 2 or 3)
    More balancing
    Mixtures in more
    Balance
    Mixtures again.
    Balance again.
    Probably more times than that until I couldn't get it any better, engine sounds healthy.
    Held linkage up to reconnect, it was getting on for 10mm short - that how out of balance it was. :eek:
    Reconnected, balance opening by eye/ear.
    Done.
    Pretty easy to make a good improvement when somethings as far out as this was and that's a nice feeling.
    If it were mine
    SVDA distributor
    Stock exhaust
    Check jetting and emulsion type installed and go from there. I suspect it's not right and you'll get plenty advice on here about what works. First you need to know what you have though... and to find out you'll be disturbing the linkage. It's one reason I prefer the centre pull ones - not mounted on the carbs.
     
  4. MrDavo

    MrDavo Supporter

    Zed at work:
    3A554028-2E67-4795-A731-F75B7A423A3A.jpeg
    Bays in the marina:

    FD682F05-575F-4CC2-AF76-35C9710FA7E2.jpeg

    If I had a SVDA distributor where would I get the vacuum feed from, is there a blanked tube anywhere on the carbs or manifold?
     
    mcswiggs, rsbadura and Zed like this.
  5. Zed

    Zed Gradually getting grumpier

    I didn't actually check but I'm sure there will be, probably one on each carb though you only need one.

    Mine needs it's yearly wash!
     
    MrDavo likes this.

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