Help!! 3.59 Stroker assembly

Small Block Mopar Engine

  1. Bigboy 68

    Bigboy 68 it is what it is FABO Gold Member

    Messages:
    1,354
    Likes Received:
    197
    Joined:
    May 16, 2017
    Location:
    Newark,Delaware
    Local Time:
    3:08 PM
    I just purchased a nice set of 3.59 stroker pistons they have .927 pins I need to know what rods I need to get and also where would I get a forged stroker crank for this set up thank you in advance
     
  2. Ottmundr

    Ottmundr 68 Fastback

    Messages:
    5,613
    Likes Received:
    8231
    Joined:
    Oct 5, 2012
    Location:
    Sonoma
    Local Time:
    12:08 PM
    Home - SCAT Crankshafts

    Cast cranks are around three fifty on summit. Forged above seven hundred if memory serves.
    I cant remember the prices on rods.

    On Scat's page just search for Chrysler engines, 3.58 stroke and that should get you to the part numbers list.
     
  3. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

    Messages:
    15,460
    Likes Received:
    3958
    Joined:
    Jan 16, 2005
    Location:
    las vegas
    Local Time:
    12:08 PM
  4. Bigboy 68

    Bigboy 68 it is what it is FABO Gold Member

    Messages:
    1,354
    Likes Received:
    197
    Joined:
    May 16, 2017
    Location:
    Newark,Delaware
    Local Time:
    3:08 PM
  5. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

    Messages:
    15,460
    Likes Received:
    3958
    Joined:
    Jan 16, 2005
    Location:
    las vegas
    Local Time:
    12:08 PM
    Thank you
     
  6. Biff

    Biff Cheep not easy

    Messages:
    4,467
    Likes Received:
    6771
    Joined:
    Jan 30, 2017
    Location:
    Middle of the ocean somewhere in Canada
    Local Time:
    12:08 PM
    And that’s why this site is awsome:thumbsup:
     
  7. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

    Messages:
    38,038
    Likes Received:
    9723
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    Local Time:
    3:08 PM
    3.58 stroke in a 340 block?
     
    • Agree Agree x 2
    • greymouser7

      greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

      Messages:
      3,328
      Likes Received:
      2618
      Joined:
      Apr 17, 2010
      Location:
      78002 down the road from Atascosa, Texas
      Local Time:
      2:08 PM
      What is the part number and information (like compression ratio) for your pistons?
       
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

      Messages:
      38,038
      Likes Received:
      9723
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      Local Time:
      3:08 PM
      No matter the block, a KB-107 in the proper oversize will work or any equivalent piston, flattop or domed or dished.
       
    • Bigboy 68

      Bigboy 68 it is what it is FABO Gold Member

      Messages:
      1,354
      Likes Received:
      197
      Joined:
      May 16, 2017
      Location:
      Newark,Delaware
      Local Time:
      3:08 PM
      The Pistons are JE517 domed piston 11.75 compression 40 overbore 3.59 340 pistons
       
      • Thanks! Thanks! x 1
      • stixx

        stixx Well-Known Member

        Messages:
        785
        Likes Received:
        553
        Joined:
        May 30, 2006
        Location:
        Southern Germany
        Local Time:
        8:08 PM
        Confusing to me is the 3.59 number... either it's 3.58 (Mopar 360 but not a stroker), or it's 3.79 which in fact would be a stroker crank.
        There are cranks for both strokes available... what rod length to use depends solely on the compression height of your pistons.

        Btw. funny strategy to buy pistons first and then worry about crank and rods? :poke:
         
      • rumblefish360

        rumblefish360 So close, yet so far away FABO Gold Member

        Messages:
        38,038
        Likes Received:
        9723
        Joined:
        Jun 21, 2005
        Location:
        New York, on a Island
        Local Time:
        3:08 PM
        Skip the 3.59 thing......

        A 360’s crank stroke is commonly referred at 3.58.
        A 340’s stroke is 3.31.
        The old tyme stroker trick in the ‘70’s was to cut the 360 crank to fit into the 340. This with a .030 overbore makes a 372 cid engine. Or 372.61 exactly which some places round up to 373. Which is fine. Factory does this as well. Up and down in the cid. This makes the stock 360 crank a stroker crank for the 273/318/340.

        I don’t know if there were big stroke stroker cranks available back then. I’m sure the 3.55 cid stroker crank and the down size crank for the 5.0 SCCA racing effort was. I don’t know about the other up stroke cranks like the 3.79 and all the others in between.

        Bigboy’s high compression 372 should be a rip to drive.
         
        • Agree Agree x 1
        • greymouser7

          greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

          Messages:
          3,328
          Likes Received:
          2618
          Joined:
          Apr 17, 2010
          Location:
          78002 down the road from Atascosa, Texas
          Local Time:
          2:08 PM
          If Bigboy 68 is Rodney (memory?) he has more mopar stuff than you and me combined. And my garage is full, with the yard overflowing. It’s more about the deal, unique builds for him. He has been known to make full size wagons go fast.

          I never got to see his 67/68 Dart build though.
           
        • greymouser7

          greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

          Messages:
          3,328
          Likes Received:
          2618
          Joined:
          Apr 17, 2010
          Location:
          78002 down the road from Atascosa, Texas
          Local Time:
          2:08 PM
          The 355 crank was 3.51” (?yellow alloy?) forged. Not as strong as 4340. I think it was 10XX something alloy.
           
        • rumblefish360

          rumblefish360 So close, yet so far away FABO Gold Member

          Messages:
          38,038
          Likes Received:
          9723
          Joined:
          Jun 21, 2005
          Location:
          New York, on a Island
          Local Time:
          3:08 PM
          The 3.55 cranks comes in several (*3 I think*) sizes.
          There a 1053/1054... ahhhh I forget. True, not as strong as a 4340. But that is it a worry point.

          The particular one I have is (IIRC....) a 3.45 stroke.
           
          • Agree Agree x 1
          • 4spdragtop

            4spdragtop FABO Gold Member FABO Gold Member

            Messages:
            28,959
            Likes Received:
            9023
            Joined:
            Aug 28, 2009
            Location:
            Wasting time here
            Local Time:
            2:08 PM
            His name is Bob/Robert Mills, aka Superdart340 or Superdart426.
            Interesting to see what combo he goes with, I'm confused (easily) already.
             
            • Thanks! Thanks! x 1
            • Agree Agree x 1
            • greymouser7

              greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

              Messages:
              3,328
              Likes Received:
              2618
              Joined:
              Apr 17, 2010
              Location:
              78002 down the road from Atascosa, Texas
              Local Time:
              2:08 PM
              I understand bob mills to be a villain, not the same person I was thinking
               
              • Like Like x 2
              • Agree Agree x 2
              • yellow rose

                yellow rose Doctor of Thinkology.

                Messages:
                22,043
                Likes Received:
                18114
                Joined:
                Jun 19, 2015
                Location:
                Living on the razors edge
                Local Time:
                12:08 PM

                They are 1018 steel.
                 
                • Thanks! Thanks! x 1
                • '63GT

                  '63GT Well-Known Member

                  Messages:
                  1,024
                  Likes Received:
                  965
                  Joined:
                  Jun 9, 2018
                  Location:
                  Turlock, CA.
                  Local Time:
                  12:08 PM
                  Those pistons are probably made for NHRA Stock or Super Stock applications...
                  The rules allow for .010 over stroke, making a OE 360 crank 3.59. it is stamped 3.59 so that the .067 or .070 deck Ht will be correct when the NHRA tech checks it in tear-down.
                  (of coarse the engine builder would know that.. it would be made up for, when the block is cut)
                   
                • greymouser7

                  greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

                  Messages:
                  3,328
                  Likes Received:
                  2618
                  Joined:
                  Apr 17, 2010
                  Location:
                  78002 down the road from Atascosa, Texas
                  Local Time:
                  2:08 PM
                  This is what he bought:
                  JE pistons, SB Chevy, 4.08 bore, 11.75 compression ratio. | eBay
                  I bet
                   
                • greymouser7

                  greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

                  Messages:
                  3,328
                  Likes Received:
                  2618
                  Joined:
                  Apr 17, 2010
                  Location:
                  78002 down the road from Atascosa, Texas
                  Local Time:
                  2:08 PM
                  I have that crank 3.51” and those rods that 70aarcuda sold bigboy 68.

                  I was thinking about the eventual rebuild of my 73’ Plymouth Road Runner’s 340 a few years down the road. A few year$ down the road though. The engine runs fine now.
                   
                • rumblefish360

                  rumblefish360 So close, yet so far away FABO Gold Member

                  Messages:
                  38,038
                  Likes Received:
                  9723
                  Joined:
                  Jun 21, 2005
                  Location:
                  New York, on a Island
                  Local Time:
                  3:08 PM
                  IF in fact true, that is a creative route that would work. Maybe minor machining on the slugs some? (Valve clearance/angles) IDK.
                  After that, or actually before that, it’s piston pin & dome height to the deck height/cylinder head distance to be sorted out.
                  I really don’t see a reason it would t work if your willing to put in the effort.
                   
                  • Like Like x 1
                  • Bigboy 68

                    Bigboy 68 it is what it is FABO Gold Member

                    Messages:
                    1,354
                    Likes Received:
                    197
                    Joined:
                    May 16, 2017
                    Location:
                    Newark,Delaware
                    Local Time:
                    3:08 PM
                    • Like Like x 1
                    • rumblefish360

                      rumblefish360 So close, yet so far away FABO Gold Member

                      Messages:
                      38,038
                      Likes Received:
                      9723
                      Joined:
                      Jun 21, 2005
                      Location:
                      New York, on a Island
                      Local Time:
                      3:08 PM
                      Can you leave a more direct link?
                       
                      • Agree Agree x 1
                      • '63GT

                        '63GT Well-Known Member

                        Messages:
                        1,024
                        Likes Received:
                        965
                        Joined:
                        Jun 9, 2018
                        Location:
                        Turlock, CA.
                        Local Time:
                        12:08 PM
                        • Like Like x 2
                        1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                          By continuing to use this site, you are consenting to our use of cookies.