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Technical 8BA: Forged or cast Pistons?

Discussion in 'The Hokey Ass Message Board' started by poboyross, May 22, 2016.

  1. poboyross
    Joined: Apr 29, 2009
    Posts: 2,142

    poboyross
    Member
    from West TN

    My truck 8BA is being rebuilt, has hardened seats already (woohoo!) and now I'm having to pick pistons. It's a mild rebuild, mostly back to stock. I'm getting the cam reground, and it's been bored to .030 over. I have absolutely ZERO plans to have it blown. I can either get cast pistons and rings for $290, or Ross forged pistons for $500-$600. I've read conflicting stories about whether or not forged is overkill or even needed. Thoughts or real life experiences appreciated!
     
  2. RichFox
    Joined: Dec 3, 2006
    Posts: 10,020

    RichFox
    Member Emeritus

    Almost every car came with cast pistons from the factory. Some of them ran for 200,000 miles. What would make you think you need forged?
     
  3. jimmy six
    Joined: Mar 21, 2006
    Posts: 9,977

    jimmy six
    ALLIANCE MEMBER

    Nitro, nitrous, or severe duty like 14-1 compression or circle track racing would demand forged. Save you $$ for some cool vintage intake or heads. Good Luck
     
  4. flatjack
    Joined: Feb 13, 2007
    Posts: 941

    flatjack
    Member

    Forged is definitely overkill.
     

  5. GRX
    Joined: Mar 28, 2014
    Posts: 68

    GRX
    Member
    from MD

    Agree. Cast is fine for your application. Spend the extra ca$h elsewhere.
     
  6. cretin
    Joined: Oct 10, 2006
    Posts: 2,966

    cretin
    Member

    I'm in the same boat. doing a mild flathead rebuild. I went cast.
    You're in Burbank, I wonder if our flatheads are at the same place, haha.
     
  7. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    Forged actually has points of inferiority for engines that are not overstressed and used hard. They require more clearance and their manufacture makes it harder to get the non-round needs right. Pistons need to be made off-round in odd ways to arrive at roundness when hot, due to all the varying thicknesses in different areas and inclusions like pin bosses that expand more than skirts.
     
    poboyross and bct like this.
  8. poboyross
    Joined: Apr 29, 2009
    Posts: 2,142

    poboyross
    Member
    from West TN

    Dave's?
     
  9. cretin
    Joined: Oct 10, 2006
    Posts: 2,966

    cretin
    Member

    Yup. Actually got my Pistons today and dropped them off over there.

    I got my Pistons from Southside obsolete, for less then you said you can get the cast Pistons, so I might check them out. Maybe they have something for you.
     
  10. poboyross
    Joined: Apr 29, 2009
    Posts: 2,142

    poboyross
    Member
    from West TN

    I ended up ordering some Sealed Power pistons from Falcon Global in Memphis and the bearings from C&G in OC. It should all be up here middle of next week I think. I wanted to get hypereurtectic (or however the heck you spell it) but they didn't have any. No worries, I only have a mild cam grind...all stock anyway.
     

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