Picked up a slant for the first time

Slant 6 Engines

  1. CaseyFJ

    CaseyFJ Active Member

    Messages:
    36
    Likes Received:
    26
    Joined:
    Nov 5, 2019
    Location:
    Columbus, OH
    Local Time:
    6:25 AM
    Hey Everyone,

    New to the board and to the slant 6 game!

    I just picked up a 68 Valiant 4-door with the 170ci slant. The car is super clean. Just turned 47,000 miles.

    looking to just cruise it and race it on the occasional Wednesday nights and local molar races. I bought it from the second owner. He raced it a bit.. 14.50s in the eighth.

    Any recommendations on bolt ons that would be good to gain a little more power? I have no intentions of tearing apart the motor at this time.

    Thanks everyone!
    Casey FJ

    D6E606D2-EB3D-45C9-8CDD-5B1639420E12.jpeg

    3A724709-63DB-429E-B2C4-E0721E1B885E.jpeg

    23D548AC-F2E9-4466-A021-A5D5199E15F2.jpeg
     
    • Like Like x 5
    • ocdart

      ocdart Inland Mopars Car Club FABO Gold Member

      Messages:
      9,741
      Likes Received:
      3093
      Joined:
      Nov 5, 2006
      Location:
      North OC, SoCal
      Local Time:
      3:25 AM
      Welcome Casey!
      Great find. Very clean car. Only 47,000? Wow.
      Sorry, but gotta do it..."Molar races"? Is that just for dentists?
      Again, welcome to the madness.
       
      • Like Like x 1
      • RustyRatRod

        RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

        Messages:
        73,370
        Likes Received:
        48888
        Joined:
        Jun 7, 2010
        Location:
        Georgia
        Local Time:
        6:25 AM
        I would leave it AS IS, but if you just GOTTA F with it, the Super Six setup is a good place to begin.
         
        • Agree Agree x 3
        • my68barracuda

          my68barracuda Well-Known Member

          Messages:
          1,764
          Likes Received:
          1486
          Joined:
          Dec 6, 2009
          Location:
          Indianapolis IN
          Local Time:
          6:25 AM
          Looks like fun,
          FABO has good info, but to get the best slant six scoop travel over to www.slantsix.org/forum
          they host an East/West Coast slant six racing series, so that site will get you info from the folks that actually race them with a purpose.
           
          • Agree Agree x 1
          • pishta

            pishta I know I'm right....

            Messages:
            20,103
            Likes Received:
            9434
            Joined:
            Oct 13, 2004
            Location:
            Tustin, CA
            Local Time:
            3:25 AM
            Don't want to touch the motor? Super six spec 2.25 head pipe and some 3.55 gears. 2.76 is for highway cruising. 47K, that a real peach.
             
            • Agree Agree x 2
            • 3rdLM23P9

              3rdLM23P9 FABO Gold Member FABO Gold Member

              Messages:
              722
              Likes Received:
              571
              Joined:
              Aug 8, 2012
              Location:
              Sylvania, Ohio
              Local Time:
              6:25 AM
              Welcome from NW Ohio - nice looking Valiant!
               
              • Agree Agree x 1
              • MoparMike1974

                MoparMike1974 FABO Gold Member FABO Gold Member

                Messages:
                3,172
                Likes Received:
                2452
                Joined:
                Jun 16, 2017
                Location:
                Maryland
                Local Time:
                6:25 AM
                "Picked up a slant for the first time"
                Was it heavy? Was it lighter the second time?

                 
                • Like Like x 2
                • Thanks! Thanks! x 1
                • Agree Agree x 1
                • pishta

                  pishta I know I'm right....

                  Messages:
                  20,103
                  Likes Received:
                  9434
                  Joined:
                  Oct 13, 2004
                  Location:
                  Tustin, CA
                  Local Time:
                  3:25 AM
                  Pick up the head.......Oof!
                   
                  • Agree Agree x 3
                  • Leanin'Dart270

                    Leanin'Dart270 Member

                    Messages:
                    6
                    Likes Received:
                    7
                    Joined:
                    Apr 26, 2019
                    Location:
                    Utah/Idaho Border
                    Local Time:
                    4:25 AM
                    Convert to electronic ignition if it isn't already and replace the exhaust. That is all I would bother with.
                     
                    • Like Like x 2
                    • Slantsix64

                      Slantsix64 Well-Known Member

                      Messages:
                      3,029
                      Likes Received:
                      1236
                      Joined:
                      May 11, 2014
                      Location:
                      SGV
                      Local Time:
                      5:25 AM
                      Gears would be the best bet. You can buy 3.55 gear ratios new from Richmond gears for the 7.25. That 170 will scream with 3.55s
                       
                    • Charrlie_S

                      Charrlie_S Well-Known Member

                      Messages:
                      3,302
                      Likes Received:
                      1143
                      Joined:
                      Oct 17, 2005
                      Location:
                      Silver Springs, FL
                      Local Time:
                      6:25 AM
                      Did that car come from Florida?
                       
                    • CaseyFJ

                      CaseyFJ Active Member

                      Messages:
                      36
                      Likes Received:
                      26
                      Joined:
                      Nov 5, 2019
                      Location:
                      Columbus, OH
                      Local Time:
                      6:25 AM
                      Thanks guys.

                      a couple comedians here I see haha.

                      Charlie this car has been in Ohio it’s whole life. Bought at Bill Weakleys Chrysler.

                      Great call on changing gears. Honestly did not think of that.

                      That’s just the thing.. the car is so clean and so low miles I don’t want to f with it tooooo much. Manifold, electronic ignition, gears, and exhaust might be all she gets.

                      so is a super 6 the best “all around” intake? Looks like there are quite a few options out there... are the supers hard to find?

                      thanks again!
                       
                      • Like Like x 1
                      • Charrlie_S

                        Charrlie_S Well-Known Member

                        Messages:
                        3,302
                        Likes Received:
                        1143
                        Joined:
                        Oct 17, 2005
                        Location:
                        Silver Springs, FL
                        Local Time:
                        6:25 AM
                        For your purpose, a super six is probably the best, but people now think they are made of gold. If you do find one for a reasonable price make sure you get everything, mainly the trans kickdown linkage. You could probably get a Offie manifold and a small 4 bbl (or 2bbl adapter) carb for the same or less money.
                        Stock exhaust manifold, but a 2 or 2 1/4 pipe, and free flowing muffler would not hurt. But before doing anything, I would check the basics. Adjust valves, then compression check, Maybe electronic ign, and adjust timing, maybe a little more advance. Of course check/change plugs, cap, rotor, wires, PCV (make sure the passage in the carb is clean), air filter. Drive it to see how it acts, stock, before doing mods.
                        PS: A friend here in Florida had one similar, and his estate was selling it.
                         
                        • Like Like x 1
                        • Dartnut

                          Dartnut Don't hate me because i'm beautiful

                          Messages:
                          11,523
                          Likes Received:
                          4340
                          Joined:
                          Apr 19, 2007
                          Location:
                          Southern Alberta
                          Local Time:
                          4:25 AM
                          Welcome to the forum, looks like you got a good one there.
                          As for the super 6 manifold, make sure you get all of the parts it came with such as carb, brackets, and air cleaner.
                          I also would suggest that you upgrade the exhaust to a bigger pipe from the manifold back, the original is smaller than the outlet and chokes the flow a lot.
                          The gears are a good idea as well.
                          Good luck, and keep us informed on the progress........
                           
                        • CaseyFJ

                          CaseyFJ Active Member

                          Messages:
                          36
                          Likes Received:
                          26
                          Joined:
                          Nov 5, 2019
                          Location:
                          Columbus, OH
                          Local Time:
                          6:25 AM
                          Perfect. Thanks for the tips.

                          Yea, I plan to check all of the essentials. I have driven it a bit and when I bought it the guy was racing it.

                          it will get a complete check over the winter.
                           
                        • my68barracuda

                          my68barracuda Well-Known Member

                          Messages:
                          1,764
                          Likes Received:
                          1486
                          Joined:
                          Dec 6, 2009
                          Location:
                          Indianapolis IN
                          Local Time:
                          6:25 AM
                          If you or a friend has fabrication skills, a great alternative to buying an overpriced 2bbl Super Six intake manifold is modifying a cast aluminum 1 bbl manifold to fit a 2 bbl carb. The factory Super Six manifolds have the exact same runner size as the 1 bbl manifolds. The cast aluminum 1bbl manifolds save weight and can be welded on.
                          Also, I disagree that a full kit is the best way to go. A Locar Kick Down cable is much simpler than the factory piece, easier to adjust and eliminates the issue of working with 50 year old mechanical linkages.
                          Good 2bb Holley 2280 carbs are out there.
                          As a substitute for the factory air cleaner housing. Consider a carb hat, remote air cleaner and a cold air intake duct, or the factory air cleaner if that is what you want. Then you are only looking for the 2 bbl housing and lid, not the complete kit.
                           
                        • j par

                          j par Well-hung Member

                          Messages:
                          27,900
                          Likes Received:
                          15323
                          Joined:
                          Jul 2, 2014
                          Location:
                          Portland Oregon
                          Local Time:
                          3:25 AM
                          Welcome to the forum. By far the single best thing I ever did to any of my slant 6's was a valve adjustment. It seemed they always needed one and it seemed it always completely smooth the motor out.. and my favorite part was free...
                          Good luck it's a real beautiful looking car...
                          PS. Remember to use your legs when lifting or picking things up..lol...:poke:..
                           
                        • LocuMob

                          LocuMob Fluid Technician FABO Gold Member

                          Messages:
                          2,051
                          Likes Received:
                          1608
                          Joined:
                          Oct 30, 2013
                          Location:
                          Southern Mn
                          Local Time:
                          5:25 AM
                          Nice car! I like the approach your taking, modify it for fun, but simple things that can be put back to stock if needed or wanted. That looks very clean! Good to see it's going to get used, that's what they are for.
                           
                          • Like Like x 1
                          • CaseyFJ

                            CaseyFJ Active Member

                            Messages:
                            36
                            Likes Received:
                            26
                            Joined:
                            Nov 5, 2019
                            Location:
                            Columbus, OH
                            Local Time:
                            6:25 AM
                            What are you guys adjusting valves to cold?
                             
                            • Like Like x 1
                            • j par

                              j par Well-hung Member

                              Messages:
                              27,900
                              Likes Received:
                              15323
                              Joined:
                              Jul 2, 2014
                              Location:
                              Portland Oregon
                              Local Time:
                              3:25 AM
                              Ratt's it's been so long...
                              I generally add a couple thousands when it's cold. Someone will chime and quickly with the numbers and I'm sure the exhaust and intake will be different specs...
                               
                            • j par

                              j par Well-hung Member

                              Messages:
                              27,900
                              Likes Received:
                              15323
                              Joined:
                              Jul 2, 2014
                              Location:
                              Portland Oregon
                              Local Time:
                              3:25 AM
                              I'm sure it was an easy internet Google though if need be..
                               
                            • Darter6

                              Darter6 Well-Known Member

                              Messages:
                              4,487
                              Likes Received:
                              1812
                              Joined:
                              Jan 16, 2008
                              Location:
                              Nevada
                              Local Time:
                              3:25 AM
                              intake .010 exhaust .020 factory spec.
                               
                              • Like Like x 1
                              • CaseyFJ

                                CaseyFJ Active Member

                                Messages:
                                36
                                Likes Received:
                                26
                                Joined:
                                Nov 5, 2019
                                Location:
                                Columbus, OH
                                Local Time:
                                6:25 AM
                                Thank you!
                                 
                                • Like Like x 1
                                • j par

                                  j par Well-hung Member

                                  Messages:
                                  27,900
                                  Likes Received:
                                  15323
                                  Joined:
                                  Jul 2, 2014
                                  Location:
                                  Portland Oregon
                                  Local Time:
                                  3:25 AM
                                  I assume that's hot?..
                                   
                                • KosmicKuda

                                  KosmicKuda FABO Gold Member FABO Gold Member

                                  Messages:
                                  2,112
                                  Likes Received:
                                  863
                                  Joined:
                                  Jan 15, 2011
                                  Location:
                                  N Ohio
                                  Local Time:
                                  6:25 AM
                                  Those are the factory numbers hot.
                                  I carefully did my #1 cylinder intake and exhaust hot at .010 and .020.
                                  Then let it sit until stone cold. (Next evening after work)
                                  Rechecked and they were .012 and .022.
                                  Adjusted 2 through 6 cold at .012 and .022.

                                  I would check to see that the heat riser is free and working.
                                  Because it's new to you, I'd establish a baseline with a compression check.
                                  Try bumping the timing to about 10* BTDC.
                                  170 with an automatic...just don't expect too much and you'll be fine.

                                  Pishta pipe and turbo if you want to go wild.
                                   
                                  • Like Like x 1
                                  • Thanks! Thanks! x 1
                                  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.