1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

how can i tell if i have .25 over pistons

Discussion in 'Engine Building' started by DA69, Jul 16, 2003.

  1. DA69

    DA69 Senior Member

    Messages:
    340
    Likes Received:
    0
    Joined:
    Apr 18, 2003
    Location:
    psl Fl.
    hey guys last year i bought an ls bottom from a freind. well it did me good until i floated a valve. its supposed to be .25 over with type r pistons and total seal rings. i looked on top of the pistons and didnt see anything about the bore size. i know some of them stamp it on top. well needless to say i cannot contact him and have no way to. So i want to rebuild this and need new pistons. but..... what size? please help
    thanx
     
  2. hybrid89

    hybrid89 thistownsucks...

    Messages:
    1,821
    Likes Received:
    1
    Joined:
    Jan 8, 2003
    Location:
    SoCal
    If you need to rebuild it anyway, pull one out an use and micrometer to measure or take it to a machine shop and have them measure it. B)
     
  3. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX

    :withstupid:
     
  4. DA69

    DA69 Senior Member

    Messages:
    340
    Likes Received:
    0
    Joined:
    Apr 18, 2003
    Location:
    psl Fl.
    what should my piston measure out to be. is it 81.5 or 81.25. thanx
     
  5. pills_PMD

    pills_PMD Super Moderator

    Messages:
    4,232
    Likes Received:
    0
    Joined:
    Sep 30, 2002
    Location:
    New Albany, OH
    usually in black they have 25 stamped on the top. but if you cant see it, then it should measure 81.25
     
  6. JDMilan

    JDMilan Senior Member

    Messages:
    6,730
    Likes Received:
    0
    Joined:
    May 11, 2003
    Location:
    Boca Raton, FL
Verification:
Draft saved Draft deleted

Share This Page