News:

  • Home
  • Help
  • Chat
  • Login
  • Register

    • « previous next »
    Pages: [1]

    Author Topic: Are pistons tapered?  (Read 1031 times)

    Offline priderocks

    • Jr. Member
    • **
    • Posts: 494
    Are pistons tapered?
    « on: September 17, 2009 - 04:49:32 PM »
    I have a set of Arias forged pistons, std. bore, for a 383. When I put my dial calipers across them, it appears the skirt (if that's the right term) of the piston is a larger diameter than the top of the piston. Is this normal?
    Logged


    Offline matt63

    • Sr. Member
    • ****
    • Posts: 1855
    Re: Are pistons tapered?
    « Reply #1 on: September 17, 2009 - 05:29:33 PM »
    I think so.  I'm a little rusty on this but the piston should be measured up and down below the rings (skirt).  If measured above the rings it will be much smaller.
    Logged
    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    Offline 72cudamaan

    • Resident
    • *****
    • Posts: 3248
    Re: Are pistons tapered?
    « Reply #2 on: September 17, 2009 - 08:00:47 PM »
    Yes that is correct. Actually a piston skirt is oblong and tapered. The piston manufacturer always marks on the box or puts a tag in the box detailing where exactly to measure the piston for an accurate actual dimension. This info is to be used by the machinist so he knows what size to finish hone the bore to.
    Logged
    If I cant fix it, it's broke
     
    Andy  (phukker whither)

    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
    • *****
    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Are pistons tapered?
    « Reply #3 on: September 18, 2009 - 12:13:08 AM »
     :iagree:
     the piston is oval for expansion & the top is slightly smaller diameter than the skirt
    Logged

    Challenger - You`ll wish You Hadn`t
    Pages: [1]
    « previous next »