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Big block overboreXstroke chart?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Ryan B., Sep 2, 2001.

  1. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    I was wondering if anyone has the numbers as far as bore X stroke, and cu. in. for overboring a 454 big block.

    Lots of people think a .030" over 454 is a "468".
    My friend bored his 454 .070" and when he did the math, he came up with a 469 c.i.d.
    Anyone care to straighten this out?

    I know there's one guy on this message board called "468BigBlock" maybe he can clarify for us?
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    a 468 is a .060 over 454...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  3. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    Anyone have the spec's for all the possible overbore sizes, and what cid it would make?
     
  4. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Ryan,

    I've got a spreadsheet that calculates all of the combinations....PM me, and I can e-mail it to you.

    -Greg72
     

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