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carb slides

Discussion in 'XJ Modifications' started by 2sluggos, Apr 11, 2009.

  1. 2sluggos

    2sluggos Member

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    What do you use to polish carb slides?
     
  2. JoeFriday77

    JoeFriday77 Member

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    I don't remember where I read it, but I believe I read that people were using a scotchbrite pad to remove oxidation.
     
  3. XJ700VET

    XJ700VET Member

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    Howdy 2sluggos. There is a great write up on carb cleaning by one of the Moderators; RickCoMatic called "Clean Your Own Carb's - The Whole 9 Yards - by: Rick Massey". It's a very good read and, explains all aspects of a thourogh carb cleaning.

    This is what he said about cleaning that area.

    With the Hat off ... spring out ... and diaphragm un-seated to its locating channel -- LIFT the brass piston to the top of its travel and let it fall. The Piston needs to FALL! It absolutely MUST drop ... from being raised-up and let-go ... like a safe out a second-story window! If it chatters down, hesitates, acts like it being hydraulically controlled, is slow, stops and goes ... or, does anything, other than DROP ... like a wet bag of cement ... you've got a performance problem. SLIDE PISTON STICTION. Get rid of it. It's easy enough to do.
    Polish the brass piston. It should be a shining brass object a Marine Corp Recruit would be proud to show his Drill Instructor. You can polish the needle, too! BUT -- DON'T bend it!
    The Carb Body Bore is usually where the problem is. A film of oxidation forms on the Inside Diameter of the cylinder bore surfaces. This film reduces the inside diameter's already close tolerance to make the brass piston's travel become impaired. Elbow grease and finishing papers will restore the original shine to the alloy.
    Use # - 800 Wet-'O-Dry to clean the surface. Vertical motion only. Refinish the bore with 800 using WD-40 as the wetting agent. Using sections of 800 about the size of a pack of matches ripped in half ... refinish the inside diameter of the bore. Throw-away the 800 section as it becomes fouled. Refinish UP and DOWN ... moving ALL AROUND. Don't do anyplace where you think its sticking. Keep the bore round.
    Feel like doing another 15-minutes of work that will give you a Full Stage closer to RACE-PREPPED??? OK ... after you clean-up the bore with the 800 Wet ... Hit all the bores, AGAIN, with 1000 - 1200 and 1500 !! WD-40 is your wetting agent. When you are done, there should ZERO drag. Nothing preventing the diaphragm from raising the piston when vacuum is present. And, NOTHING from preventing that SPRING and NO VACUUM from allowing those slides to slam-shut for some ABSOLUTELY wonderfully controlled engine braking when you've got your Carb's - "Dialed-in!"

    Cheers
    Ken
     
  4. 2sluggos

    2sluggos Member

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    On vacation this week and I'm all over those slides like flys on poop.
    Thanks guys
     
  5. bill

    bill Active Member

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    You will probably do more polishing of the carb body where the slides seat. The slides are usually fairly clean.
     

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