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Thread: Piston ring tech help!!!

  1. #1
    Senior Member RACING JUNKIE
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    Piston ring tech help!!!

    I need a little help here

    I am building a 9.5 to 1 383 that howell efi is setting up the efi to run on the street and hopefully for along time. I bought a eagle rotating kit and i think the rings it came with are not so great? Part number 40564cp.030
    This is not a race car, just something that should make a reliable 300 hp. What i have now started wondering is what type of ring would be the best to put in....

    Is there only one material type referd to as moly?
    A chrome top ring?
    Is there a Chromoly ring also?
    Cast iron?

    Thanks! Keith

  2. #2
    Senior Member RACING JUNKIE
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    moly rings are what you may want to use

  3. #3
    Senior Member DYNO OPERATOR
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    That looks like a Perfect Circle part number. If so, those are moly rings. Moly ring part numbers start with a 4 and cast ring numbers start with a 5.

    TS1955

  4. #4
    Senior Member RACING JUNKIE
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    That is a perfect circle part number.... but they sell for like 40 bucks at summit... so surely the are not a good moly ring? Or maybe im wrong?

    Top Ring Material Cast iron
    Top Ring Facing Material Chrome
    Second Ring Material Cast iron
    Second Ring Facing Material Cast iron
    Oil Ring Material Stainless steel

    http://www.summitracing.com/parts/PCR-40564CP-030/

    that is what summit list them as????????

    Use them or not?

  5. #5
    Senior Member RACING JUNKIE
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    Sounds like a conventional moly ring set if they were only $40.

    For more dough you can upgrade to some plasma moly rings.
    They are around $100-$150 at most parts houses.
    Thats what I use on any performance build.


    Speed pro, Childs and Albert etc...
    ***IN GOD WE TRUST***

  6. #6
    Senior Member RACING JUNKIE
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    Okay, does no one know tech about rings?

  7. #7
    Senior Member RACING JUNKIE
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    Belleville, IL
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    This is the best place to get ring tech: http://www.totalseal.com/TechPage.aspx

    They are also very good people to talk to on the phone. If you don't see the info you want on their page, call them.
    -WJ Birmingham

    OneBadGMC.com

  8. #8
    Junior Member APPRENTICE
    Join Date
    Aug 2003
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    15

    rings

    no such thing as CHORME moly rings Only moly rings . summits moly rings plenty good for a street motor as long as the machine shop did its job right. The only reason for moly rings is breakin time is almost none a chome ring takes some time to seat and seal in the ld days you were supposed to drive the car a certain way for 500 mile. now with moly you can fire it up run it at about 2500 rpm till its get to operating temp cool it down. it should be good to go

  9. Racing Junk


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