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259 / 289 block difference?

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  • 259 / 289 block difference?

    Is there any difference between these blocks?
    Wayne
    "Trying to shed my CASO ways"

    sigpic

  • #2
    I believe the difference is in pistons and crank; not in block.
    Brad Johnson,
    SDC since 1975, ASC since 1990
    Pine Grove Mills, Pa.
    '33 Rockne 10, '51 Commander Starlight. '53 Commander Starlight
    '56 Sky Hawk in process

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    • #3
      No. There are 259/289 add-on filter blocks, and there are 259/289 full-flow blocks, but otherwise they are the same.

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      • #4
        What whacher said

        Most of the "cast in" blocks were of the 289 persuasion

        Mike

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        • #5
          Just curious, what is the difference in the pistons. From what I can find, the rods and rings are the same. Why couldn't you swap the pistons between the 259 and 289
          Wayne
          "Trying to shed my CASO ways"

          sigpic

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          • #6
            Wrist pin hole position.
            Crank has longer stroke.
            Rods are the same.
            Wrist pin hole positions the piston top at the same height as the other crank/rod/piston setup.
            But the piston goes down (and up) further on a 289.
            If you put a 259 piston on a 289 crank you would stick out of the cylinder top (hit the head) and probably have the piston skirt hit the crankshaft.
            HTIH (Hope The Info Helps)

            Jeff


            Get your facts first, and then you can distort them as much as you please. Mark Twain



            Note: SDC# 070190 (and earlier...)

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