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push rod diameter

This is a discussion on push rod diameter within the Internal Engine forums, part of the LSx Technical Help Section category; anyone know the dia. of the push rods for a 98 z-28 ls1. 5/16 or 3/8? please help!!!!...

  1. #1
    Junior Member ls1alltheway's Avatar
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    white&black
    1998z28w/t-tops

    Cool push rod diameter

    anyone know the dia. of the push rods for a 98 z-28 ls1. 5/16 or 3/8?
    please help!!!!

  2. #2
    Member 2001hawk's Avatar
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    Black & Black
    2001 Firehawk & 2002 WS-6

    Believe the stock ones are 5/16. I questioned whether or not to go with the 3/8 ones when I did my heads and cam in my first T/A. I was told the 5/16 ones are better because of the less weight and the extra strength is not needed until you have a LOT of mods. My $0.02.

  3. #3
    Junior Member machineman-baltimore's Avatar
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    1993 Ford Explorer

    I used to always go with the smaller pushrods to save weight but for high RPM applications (6000 and up) I usually go with 3/8 if I can because there is a lot of deflection in the smaller pushrods; even on the heavy wall versions. The extra weight is offset by the better stability and the fact that you are getting more of your valve lift back.
    Chris Crossont
    A.H.M. Performance
    Baltimore, MD

  4. #4
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    stock is 5/16.

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