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  1. #1
    Bronze Member
    Join Date
    Oct 2012
    Posts
    77
    Location
    Windham
    Tractor
    John Deere 70

    Default Power blocks, what are the benefits?

    Curious as to what you gain with a power block? No doubt they are hard to find and I have read you can bore and sleeve stock blocks out into the 7" range.

  2. #2
    New Member
    Join Date
    Oct 2012
    Posts
    3
    Location
    missouri
    Tractor
    1939 b ac,37 wc,45wc,44 jda,51gjd

    Default Re: Power blocks, what are the benefits?

    well for one thing they are a bigger bore i know that a jd A is stock 5.5 and the powerblock is 6 inches so you gain more standard bore so what you can bore the regular engine you can do more to the powerblock and up your compresion. id like to have a g powerblock. now the downside they dont have pitcocks but a machine shop can put them in at a low cost.

  3. #3
    Veteran Member
    Join Date
    Apr 2004
    Posts
    2,412
    Location
    East Coast of Lake Huron
    Tractor
    Deere, several

    Default Re: Power blocks, what are the benefits?

    Quote Originally Posted by mdross1 View Post
    Curious as to what you gain with a power block? No doubt they are hard to find and I have read you can bore and sleeve stock blocks out into the 7" range.
    Back in the day. A power-bloc provided a low cost simple
    bolt on increase of displacement and compression.
    Often allowed the tractor to pull the same load in one higher gear.

  4. #4
    Bronze Member
    Join Date
    Oct 2012
    Posts
    77
    Location
    Windham
    Tractor
    John Deere 70

    Default Re: Power blocks, what are the benefits?

    That's what I thought.Heard a 60 with a powerblock and straight pipe idling at a recent pull Man, was that ever a sound I love to hear.No doubt this motor had the compression bumped up.It was not missing a beat.

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