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Red Armor* Poll

Discussion in 'Chainsaws' started by Red97, Jan 14, 2018.

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How long? Bare bore, bare piston

  1. Not start

    1 vote(s)
    2.9%
  2. Almost tuned

    6 vote(s)
    17.1%
  3. 1st cut

    7 vote(s)
    20.0%
  4. Half tank

    15 vote(s)
    42.9%
  5. Something else failed

    6 vote(s)
    17.1%
  1. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Dad has been running a bare bore 54cc since 1989. Last time I had it down for av's and boot the p+c still looked great. Piston is chromed with bare bore in poulans like that.
     
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  2. Red97

    Red97 ONE OF THE GREATEST!

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    Anything different about the rings? That you know/noticed?
     
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  3. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Not a clue on the rings. Never noticed. Just ordered what ever the bare bore had listed. I will take a look at the ipl's.

    But the bare bores are real dark looking.
     
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  4. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Ring shows the one used in the 54cc bare bore also superseded to the one run in the chrome bore now. So you tell me. Just what I seen running the numbers.
     
  5. wcorey

    wcorey Pinnacle OPE Member

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    I think it would run long enough for the intended purpose, though the probable difference in comp may skew the results.

    Seems like chrome rings may be better than iron, smooth and sort of pre-broken in.
    Seems like galling will be the big issue and anodizing the piston would be easier than the bore.
    Just watch the pin clearance.
     
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  6. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Going to go to order rings and see what set they put in cart for bare bore to see if above is true. What I seen when running #'s.
     
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  7. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Thats what it does. Just supersedes to the new ring.
     
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  8. Cut4fun

    Cut4fun Redneck Chainsaw Repair

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    Bare on bare I wouldnt think last long. Coat the piston with something. JMO
     
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  9. Keith Gandy

    Keith Gandy 93 efree, Klotz KL200, Echo Red Armor 40:1

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    Hard bore to soft rings or hard rings to soft bore ? Should last awhile but once the bore is gone its gone?
     
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  10. RIDE-RED 350r

    RIDE-RED 350r Pinnacle OPE Member

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    Maybe I'm wrong, but I would think the hard rings on the soft bare aluminum bore is the real issue here rather than the aluminum piston and bare aluminum bore. Its the ring/s that put the most pressure on the cylinder walls and what I would think will do the most damage to the bare aluminum cylinder bore. Yes, pistons do expand some as they come up to temp, but they should never get to zero clearance...that's when heat builds to the point the aluminum piston starts to soften and melt, transferring material to the bore and seizing up..
     
  11. Red97

    Red97 ONE OF THE GREATEST!

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    Thinking the bore finish needs to be smooth as possible. 800-1000 grit.
     
  12. Keith Gandy

    Keith Gandy 93 efree, Klotz KL200, Echo Red Armor 40:1

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    Impregnate that thing with moly or ester
     
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  13. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality

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    I'd at least want to get to know 'em first, before I impregnated 'em. ;)
     
  14. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    I pretty much agree. I think the heat expansion with the hard on soft metal would be the major wear points
     
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  15. Mastermind

    Mastermind Knocker Of Farts Staff Member

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    Cool thread Joe. Very cool.
     
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  16. Red97

    Red97 ONE OF THE GREATEST!

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    My thoughts are the piston material is likely harder than the bare jug.

    Keep the jug slick (mirror) finish. And hope the oil does it's job. Keep a film/barrier between the wear surfaces.

    Now the ring will wear the bore, but I can't see it "cutting" chips on every stroke.

    A chrome ring would likely help. But a clean smooth ring shod do the trick.


    May be way off. I plan to find out though.
     
  17. Manofstihl661

    Manofstihl661 Pinnacle OPE Member

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    I love the idea and love experiments!
     
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  18. beaglebriar

    beaglebriar "I have a potty mouth" + GFY

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    I bet the title of this thread gave Keith Gandy a boner....
     
  19. RIDE-RED 350r

    RIDE-RED 350r Pinnacle OPE Member

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    I don't have any first hand experience in this, but in my mind I don't see the ring so much chipping the bore, but grinding it..,making fine aluminum dust similar to what you get when you port a cylinder with your carbide burr. This is just my hypothesis, curious to see how it pans out when you test it.
     
  20. Red97

    Red97 ONE OF THE GREATEST!

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    I will venture to guess the old Briggs cool bore, and poulan bare bore jugs were a hypereutectic alloy. Over 12% silicon, special casting process brings the silicon to the bore surface. A special honing process removes just the aluminum exposing the silicon grains as the wear surface.

    The alum block Vega is one example of this process. Probably explains the dark color bore mentioned above.

    Have to do some more reserch on the subject When I try casting my own jug..

    Either way still gonna see what happens with the bare bore. It it doesn't work it needs to be bored larger for the iron sleeve anyway.
     
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