Piston Rings
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Piston Rings

  1. #1
    Senior Member Brendellajet's Avatar
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    Default Piston Rings

    Piston is a forged SRP 4.280 piston in a 10:1 engine with a solid lifter cam from Clay smith. No Nitrous, no blower, no vacuum pump. Can anyone make a recommendation? Looking for a quality ring that doesn't break the bank.

    Im seeing rings that are Plasma moly, chrome plated carbon steel, ductile iron, cast iron etc. What ring will be best for a boat engine and should they be a purchased as a file fit or is there a ring that will be ready to go out of the box for an engine like this? If file fit, what clearances?
    Last edited by Brendellajet; 02-28-2008 at 06:18 PM.

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  3. #2
    21 Daytona Outlaw's Avatar
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    I used total seal TSS file fit rings on my last engine build
    moly top ring, gapless 2nd ring and a standard tension
    oil ring good for 10.5 to 1 and below, even thou application
    shows NA only tech support told me mild NOS was fine.

    I would have to look up the clearances,

  4. #3
    TEN THIRTY ONE RCB19's Avatar
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    Quote Originally Posted by Brendellajet View Post
    Piston is a forged SRP 4.280 piston in a 10:1 engine with a solid lifter cam from Clay smith. No Nitrous, no blower, no vacuum pump. Can anyone make a recommendation? Looking for a quality ring that doesn't break the bank.

    Im seeing rings that are Plasma moly, chrome plated carbon steel, ductile iron, cast iron etc. What ring will be best for a boat engine and should they be a purchased as a file fit or is there a ring that will be ready to go out of the box for an engine like this? If file fit, what clearances?
    I would get the kit that is recommended buy JE for those pistons but in the file fit version. I like to have more control of the gaps by setting them myself. Speed pro mollys are a decent ring pack too.
    RCB

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  6. #4
    B1 Racing cs19's Avatar
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    moly ring. give these guys a call, they will dial you in..

    http://www.akerlychilds.com/pistonrings.php
    B1Racing.net

  7. #5
    DJD
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    6TH STREET MAFIA PRES. DJD's Avatar
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    Quote Originally Posted by Outlaw View Post
    I used total seal TSS file fit rings on my last engine build
    moly top ring, gapless 2nd ring and a standard tension
    oil ring
    Gets my vote for sure. Ive built everything from river cruisers to blown gas blown alky and ran a few nitous motors with these and had great luck. Just get the gap rite for what your doing with them.

  8. #6
    Brendella 2" Runner NoS Arneson's Avatar
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    I agree with RCB19 and DJD to fit them yourself. TSS and Speed Pro, Hastings has some nice rings. The key is to file fit them yourself to get the best fit to control blow-by with the 'marine' clearances in the cylinders. So you'll spend $150, but take the time to file fit the gap -it's not too painful and can be done with a feeler gauge and hand crank-style ring filers are easy to get ahold of. Make sure you take a honing stone or very fine file and take-off the rough edges after getting the optimum gap. SRP will provide you a calculation for your marine application that'll look something like this: Bore Size * .000xx (where they have different x #s for applications, e.g., Marine, Nitrous, Blower, Fuel, Circle Track, Marine Blown, etc.). I did this on my 463 BBC and have absolutely NO blowby! I have the breathers uncorked and I get no oil or even any hint of oil vapor on my covers and these are open to air! So it's worth the time, I am convinced of that. P.S. Make sure you start with the right cylinder wall clearances for the block considering the load and different cooling characteristics of a marine motor. Then, SRP will give you their recc'd ring gap and your all set.
    - Gary "Mr Scary" Arneson
    1978 Brendella 2" Runner 463 Nitrous BBC

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