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Thread: Piston Coating

  1. #1
    Eastside Powersports Slow 91's Avatar
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    Piston Coating

    Hey guys, im going to be putting my 1300 TJ ported top end together in the next couple weeks. i have new rings, gaskets, pin bearings on order right now. My question is, my friend works at a powder coating shop and he owes me some money. Should i have my oem 1300 pistons top and side coated? if so, does this effect clearance of the piston to wall? I plan on quick honing each cylinder as well.


  2. #2

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    Quote Originally Posted by Slow 91 View Post
    Hey guys, im going to be putting my 1300 TJ ported top end together in the next couple weeks. i have new rings, gaskets, pin bearings on order right now. My question is, my friend works at a powder coating shop and he owes me some money. Should i have my oem 1300 pistons top and side coated? if so, does this effect clearance of the piston to wall? I plan on quick honing each cylinder as well.

    Im not sure I understand what you mean. Are you considering having the PISTON Powdercoated?

  3. #3
    Joe Stang's Avatar
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    I think he means his friend who has the powdercoating shop can do the moly coating on the pistons, or whatever they call it.

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    Quote Originally Posted by Joe Stang View Post
    I think he means his friend who has the powdercoating shop can do the moly coating on the pistons, or whatever they call it.
    Maybe. I was thinking he meant to say he was going to have the cylinders podercoated. If this is what he meant, Powder coating the cylinders would hold too much heat IMO.

  5. #5
    http://www.swaintech.com/

    for a better understanding...

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    Excellent info Andy. Thanks for clearing that up.

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    WATER WOODY's Avatar
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    Before you go coating your pistons, you better check your clearence's first!

  8. #8
    SurfRider's Avatar
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    I've used the Swain on my piston tops on my supercharged 911 engine. The stuff works great (and yes, I've had *many* melted pistons while developing this engine). The coating is so thin that it will not affect compression. They even have a special coating for the skirts, but I haven't tried that. Actually they have coatings for just about everything.

    If you think you will have a problem with heat from lots of compression and/or timing, this stuff will help. But unless you are having a problem, I don't think it's going to do any good and would probably be a waste of money if you were just going to coat the tops of the pistons. If you were going for the anti-friction skirt coating, that may be a different story.

  9. #9
    Moderator OsideBill's Avatar
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    I have gone with both Swaintech and Ram Pro-Line for coatings. The swaintech is a winner, PC-9 on the skirts and ceramic on top. I will report on the Ram Pro-line once I get the next two motors in skis.

  10. #10
    Eastside Powersports Slow 91's Avatar
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    Quote Originally Posted by WATER WOODY View Post
    Before you go coating your pistons, you better check your clearence's first!

    .008" In all 3 holes.

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