News:

  • Home
  • Help
  • Chat
  • Login
  • Register

    • « previous next »
    Pages: [1]

    Author Topic: 318 = 340?  (Read 849 times)

    Offline Dusty1

    • Jr. Member
    • **
    • Posts: 313
    • Revived
    318 = 340?
    « on: September 20, 2008 - 09:58:29 PM »
    This has probably been asked a thousand times, sorry. I have a '68 318, can it just be bored out to a 340 ci and be the same motor as a 340? Thanks!
    Logged
    Garys 1972 BS


    Offline ChallengerHK

    • Sr. Resident
    • ******
    • Posts: 7338
    • I'm working on it - No, really
    Re: 318 = 340?
    « Reply #1 on: September 20, 2008 - 10:14:11 PM »
    My quick math says you can probably get to 322-323 with a .030 overbore. I'm not sure what the max safe bore for a 318 is. You could stroke AND bore it and get a lot more cubes, but if I was going to do that (and I am  :bigsmile:) I'd start with a 340 or 360 and really max it out. On the other hand, there's some guys on her running some pretty impressive 318s.
    « Last Edit: September 20, 2008 - 10:25:57 PM by ChallengerHK »
    Logged


    "She'll make point five past light speed. She may not look like much, but she's got it where it counts, and I've made a lot of special modifications myself."

    - Han Solo, Star Wars

    Advice Thread - Taking Pictures Of Cars

    Offline GoodysGotaCuda

    • Sr. Resident
    • ******
    • Posts: 5392
    Re: 318 = 340?
    « Reply #2 on: September 20, 2008 - 10:40:02 PM »
    I have HEARD of some being bored to a 340 with sonic checking. It's still risky.

    Stroker would be the best, get up to 390 cubes from a 318 without much trouble.
    Logged
    Build Page: Goody's 'Cuda Build Page
    1976 Dodge Warlock
    1972 Barracuda - 5.7 Hemi + T56 Magnum

    Wheel & Tire Specs:Link

    Offline Topcat

    • C-C.com Expert
    • ********
    • Posts: 15376
    • Member since 9/16/04
    Re: 318 = 340?
    « Reply #3 on: September 20, 2008 - 11:28:11 PM »
    According to an Article I have that I just read in Mopar Muscle...Nov 03.
    The article "A 318 Power Trip" The guy bored out his 318 to .060"

    An excellent article for anyone considering a 318 build up.
    Logged
    Mike, Fremont, CA.

    Offline go-fish

    • Resident
    • *****
    • Posts: 2391
    Re: 318 = 340?
    « Reply #4 on: September 20, 2008 - 11:34:27 PM »
    Getcha the 4" stroker crank and bore it .030". Swirl port heads and good intake and exhaust and you'll have a Mustang and Chevy killer.
    Logged

    Offline Dusty1

    • Jr. Member
    • **
    • Posts: 313
    • Revived
    Re: 318 = 340?
    « Reply #5 on: September 20, 2008 - 11:44:36 PM »
    Thanks for the help fellas! This helps.
    Logged
    Garys 1972 BS
    Pages: [1]
    « previous next »