Tri-metal vs aluminum rod bearings

Posted by lars y, Sep 2, 2013

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  1. lars y

    lars y Supporting Member

    Joined Oct 11, 2007
    Halden, Europe
    I read up on the difference regarding the main bearings, but i couldn`t find much information about the rod bearings. Will the same principles apply on the rod bearings?

    From what i could gather the tri-metal bearings can withstand more pressure but the aluminum bearings are more forgiving.
    So in a high HP engine the tri-metal would be the better choice, while aluminum is cheaper and better suited for a stock engine.


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  2. TSIfreek

    TSIfreek Proven Member

    Joined Dec 14, 2003
    cary, Illinois
    The aluminum bearings are way more forgiving to the crack shaft as they are a very soft metal. I use the aluminum bearings and have no problem with them. Alot of engine builders perfer the aluminum bearings as well. They are cheaper but dont let that fool you.
    My DSM:
    TSIfreek 1990 Eagle Talon TSi AWD

    11.27 @ 127 MPH
  3. BlackKnight2013

    BlackKnight2013 Supporting Member

    Joined Aug 22, 2013
    Longmont, Colorado
    Tri metal bearings are mostly used for high reving engines and can take a lot of abuse when they are set up properly and the correct series is chosen.
    My DSM:
    1998 Eagle Talon N/T

    Street Build

    18.160 @ 75.750 MPH

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