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fine tuning my lark

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  • fine tuning my lark

    Now that I've fixed the brake problem, it's time to turn my attention to two other issues that my Lark has had since I bought it, maybe related, maybe not: 1) it runs a little hot - typically about halfway between half and three quaters towards hot on the gage, this in cool weather and not particularly hard use; 2) the milage seems a little low, my best tank so far has been 16.7 mpg in mixed driving. It's a 259 2brl auto with 3.31. The carb leaks a little and could probably stand to be rebuilt or at least adjusted some. Performance seems OK since the timing was advanced, no stumbles or flat spots. Am I wrong in thinking I should be able to get 20mpg in moderate driving? I've considered going whole hog and maching the manifold for a new 4brl or even fitting 3.07 gears and modifying the trans for 1st gear starts.

    Any thought and/or suggestions welcomed. Definitely need to address the overheating if I'm going to Spokane this Aug!

  • #2
    are you sure it's really overheating? It might just have a slightly hotter thermostat in it than stock; the stock standard thermo was a 170F unit which is NLA, your FLAPS probably only has 160 and 180. 170 seems to be just about midway on the gauge.

    That said, if you haven't done it yet, it's probably not a bad idea to pull the rearmost freeze plugs and dig around in there with a wire and knock loose all the rust, casting sand, etc. that is likely in the block, then follow up with a good cooling system flush (and pull the drain plugs at the rear of the block to let it drain thoroughly) you will likely be surprised by all the crap that has built up in there over the years. Don't forget to turn the heater control on when you are flushing so you flush out the heater core as well.

    good luck,

    nate

    --
    55 Commander Starlight
    62 Daytona hardtop
    http://home.comcast.net/~njnagel
    --
    55 Commander Starlight
    http://members.cox.net/njnagel

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    • #3
      No deceptive flags to prove I'm patriotic - no biblical BS to impress - just ME and Studebakers - as it should be.

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