CC'd my new heads

Discussion in 'Small Block Tech' started by Mark Demko, Jun 18, 2023.

  1. Mark Demko

    Mark Demko Well-Known Member

    Had .040 cut off, they CC'd 50 cc
    Now all I have to do is find the specs for my pistons, I know I had posted a pic of the specs on here on somebody else's thread, but cant find it.
     
  2. Fox's Den

    Fox's Den 355Xrs

    Check intake fit first before you glue make sure all the bolts go in I had to ream out the holes on intake to get those bolts in.
     
    Mark Demko likes this.
  3. Stevem

    Stevem Well-Known Member

    What do you needto find out about your Pistons?

    You have the heads off so checking the deck height is easy!

    If your talking about your valve notch volume then just oil up the notches, stuff some clay into them, level them off with a single edge blade, then remove them and drop them into your CC Burett and measure the CC displacement.
     
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  4. Mark Demko

    Mark Demko Well-Known Member

    I asked Mike about that as he cut some off the intake side of my old heads so the intake ports and bolt holes would line up, he asked “ how much was your deck cut, and your heads?” I told him and he said “ok, you need xxx off your intake side of your heads”
    He just calculated that standing there, I was amazed!
    On these heads he said let him know about the alignment, I “should” be ok.
     
  5. Mark Demko

    Mark Demko Well-Known Member

    That’s what I was thinking, just CC one of the pistons at TDC, yes?
    All I’m looking for is the total volume at TDC?
     
  6. Mark Demko

    Mark Demko Well-Known Member

    I want to find out how many CC’s the valve notches are, I don’t remember.
     
  7. Mart

    Mart Gold level member

    Probably abt 13 to 15cc.
    Did your autotecs have a quench pad or full dish?
     
  8. Mark Demko

    Mark Demko Well-Known Member

    No full dish, VERY shallow half dish with valve reliefs.
     
  9. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Is this what you were looking for?:)


    DemkoPistonSpecs.JPG
     
    Last edited: Jun 20, 2023
    FLGS400, Mark Demko and Waterboy like this.
  10. Waterboy

    Waterboy Mullet Mafia since 6/20

    Dang Larry, you are good!!!
     
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  11. Mark Demko

    Mark Demko Well-Known Member

    YESSSZ!!
    I love you Larry:p:p:p:p:p
    Thank you!!
     
  12. Max Damage

    Max Damage I'm working on it!

    Larry, how is it that you have a photo of Demko's Piston order?

    Did he post this elsewhere?

    You are good.
     
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  13. Mark Demko

    Mark Demko Well-Known Member

    I posted that awhile ago, Larry is good!
     
  14. Mark Demko

    Mark Demko Well-Known Member

    I’ll be 11.97 to 1 (Wallace Racing calculator)
    AWESOME:D
    I increased ‘bout 1 point
    Using Summit racings calculator I’m at 12 to 1
     
  15. alec296

    alec296 i need another buick

    Might as well go to e85 on that.
     
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  16. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I used the search, put "Piston cc" in, and then put Mark Demko in as user.:D:D I think it was the 4th thread I perused through. Easy Peasy:cool:
     
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  17. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  18. Mark Demko

    Mark Demko Well-Known Member

  19. Mark Demko

    Mark Demko Well-Known Member

    I’m curious if it’s going to rattle, it was fine at 11.1 to 1 on 93 pump gas, I increased a bit by having another .010 taken off these heads (.040) verses .030 on my old ones I ruined.
    I’m pushing it I know for pump gas, but what the heck:p
    This is gonna be fun!
     
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  20. Mark Demko

    Mark Demko Well-Known Member

    FINALLY assembling!
    Have one head torqued down, on to the next side one, then more parts installed.
    Hopefully going to set it back in July 4th
    IMG_0825.jpeg
     
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