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Technical compressions ratio question and is this a deal?

Discussion in 'The Hokey Ass Message Board' started by 64 SS, Jun 24, 2015.

  1. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

  2. draggin'GTO
    Joined: Jul 7, 2003
    Posts: 1,773

    draggin'GTO
    Member

    Depends on the size of the engine in question.
     
  3. gimpyshotrods
    Joined: May 20, 2009
    Posts: 18,682

    gimpyshotrods
    ALLIANCE MEMBER

    10cc's are roughly 1-point of compression on a 4" bore SBC.

    You will need a second key on the crank.
     
  4. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    Motor and parts are in the craigslist link.
     

  5. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    Yes second key is a must. I am just starting from scratch on the motor so wasn't sure if u should scoop this up.
     
  6. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    I thought 500 bucks for everything might be a good deal.
     
  7. squirrel
    Joined: Sep 23, 2004
    Posts: 49,822

    squirrel
    Member

    It might work for what you want to do. Or it might be better to set it up with dished pistons. Kind of depends on what boost, what fuel, what heads you plan to run.
     
  8. draggin'GTO
    Joined: Jul 7, 2003
    Posts: 1,773

    draggin'GTO
    Member

    Sorry, didn't see the link.

    Try using this compression ratio calculator, it's on a Pontiac site but it of course works for any brand engine:http://www.wallaceracing.com/cr_test2.php
     
  9. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    It will be a street car 100% of the time,93 0ctane pump fuel and aluminum heads. Today was the first day I actually started looking at parts.
     
  10. blowby
    Joined: Dec 27, 2012
    Posts: 7,956

    blowby
    Member
    from Nicasio Ca

  11. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    2 bolt. If I do get a 2 bolt, I will get it machined for 4 bolt splayed caps.
     
  12. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    Its says CR is 1.40 am I missing something? Haha
     
  13. squirrel
    Joined: Sep 23, 2004
    Posts: 49,822

    squirrel
    Member

    maybe you put in the wrong numbers? this is what I got with some rough numbers.

    Your displacement is 355.12 CID
    The Compression Ratio is: 10.17
     
    64 SS likes this.
  14. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    Yea man, thats not going to get it. I will just put together a parts list and do it right. I just purchased a book called street supercharging by pat Ganahl, I will start reading it tomorrow. Im sure I will be back around with more questions haha. Thanks for the help.
     
  15. gimpyshotrods
    Joined: May 20, 2009
    Posts: 18,682

    gimpyshotrods
    ALLIANCE MEMBER

    Yeah, about 250psi of boost.
     
    64 SS likes this.
  16. joel
    Joined: Oct 10, 2009
    Posts: 1,988

    joel
    ALLIANCE MEMBER

    With that collection of parts, you should be at 9.05;1 static CR.
     
    64 SS likes this.
  17. What a cool chart! I was wondering what mine is with huge-chamber heads and pop-up pistons...came out to 9.52. That's liveable.
     
    64 SS likes this.
  18. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    Block and pistons only? Could be a good price, especially if you use a thick head gasket and 76cc chamber heads; could be 8.5 or lower.. Those are some deep valve pockets in those pistons. Need a forged aftermarket crank I'm not going to use. The CH height on those pistons are with a 6 inch long rod, another few $$$. I am Butch/56sedandelivery.
     
    64 SS likes this.
  19. 64 SS
    Joined: Sep 10, 2012
    Posts: 97

    64 SS
    Member

    Comes with block, pistons, studs, stand,dual plane edelbrock intake, factory crank and fly wheel.
     

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