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Dry setting floats

Discussion in 'XJ Technical Chat' started by patmac6075, Nov 2, 2013.

  1. patmac6075

    patmac6075 Active Member

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    Ok...carbs are now cleaned, reassembled, and bench sync'd...

    I'm getting ready to "dry" set my floats (hoping to save some process time from the "wet" set by getting them close without gasoline in them)... carbs are chucked in a vise and leveled as best I can (side to side, front to back).

    Now the question is: where do I take my measurements (the current "bottom" of the float is in reality the "top"...I get this)...so should the "bottom" of the float be parallel with the "top" of the carb body?

    Thanks
     
  2. fiveofakind

    fiveofakind Well-Known Member

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    do not shortcut this step......wet-set the floats.....per the tutorial.....or you will be pulling them off again to do this step....
     
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The trouble with dry setting is two-fold.

    1: CV carbs (Mikuni's particularly) are very sensitive to float height settings.

    2: Manufacturing variances are such that relying on measured float height is not accurate enough. There can be more than 1mm in variation between the measured height, and the actual shut-off height, from one float to the next. Dry setting will get you close (and I prefer that method) but not close enough when four carbs are in play.
     
  4. patmac6075

    patmac6075 Active Member

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    Perhaps you misunderstand Five...not going to skip the wet set...just trying to ballpark it with a dry set, which should require only a single "wet" set..hopefully save the mess of working with gasoline on multiple sets and rechecks...at least that's my plan.
     
  5. patmac6075

    patmac6075 Active Member

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    Thanks K-Moe...again...not planning on skipping the wet set...any idea of what the dry set measurement is? I thought I read somewhere you want the bottom (top) of the float to be parallel with the top (bottom) of the carb body...am correct in this assumption?
     
  6. maverickbr77

    maverickbr77 Member

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    11/16" 17.5mm measured from the gasket platform (without the gasket and not on the raised rib) to the mold line (center casting mark) on the float measured on the side away from the hinge. Hold the carbs on an angle so the float tang is just touching the valve, not resting its entire weight on it. ought to get you real close.
     
  7. patmac6075

    patmac6075 Active Member

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    Much appreciate!
     
  8. patmac6075

    patmac6075 Active Member

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    Much appreciate!
     
  9. Polock

    Polock Well-Known Member

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    what i do is just wet set one, then dry set the other three to the first one. that gets you real close and you can measure them any way you want.
    truth be told, sometimes i wet set one, dry set three and let it go at that, i'am a baaaad boy
     
  10. patmac6075

    patmac6075 Active Member

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    Thanks Schmuck...with my carbs at least one was leaking like a sieve..so since I'm not sure which one was leaking, I'm treating them all like they were leaking...hence the complete rebuild.
     
  11. schmuckaholic

    schmuckaholic Well-Known Member

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    AFAIK, some manuals give a dry setting, some don't.

    You've no doubt seen the link posted to Setting the fuel levels; the idea is to get one carb set, then measure the floats, and tweak the other three to match.

    As for dry-setting the float, I personally haven't measured the float before taking a fuel level measurement; my reasoning being that the floats were more than likely at least close before I broke the carbs down, and I didn't tweak the tang for the float needle while I had them apart, so they can't be THAT far off, right?
     

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