What will my 68 Dart 408 run in 1/4 mile?

Mopar Racers Forum

  1. 68Dart500

    68Dart500 Well-Known Member

    Messages:
    278
    Likes Received:
    192
    Joined:
    Oct 24, 2017
    Location:
    USA
    Local Time:
    11:31 AM
    Just for fun I'd like to see what people think my 68 Dart will run in the 1/4 mile? Also this will be my first time running the car and setup. My only other drag race experience is with AWD twin turbo Stealths and 3000GT VR4's.

    My setup:
    1968 Dodge Dart
    4 speed manual- 23 spline
    408 Stroker (485 hp/511 tq)
    MSD 6AL2
    Aluminum radiator
    28x12.5R15 Mickey Thompson ET Street SS on steel 15x10 rims
    All steel body
    Full interior
    Quicktime bellhousing
    Chromemoly driveshaft with 1350 joints
    Driveshaft loop
    Hydraulic Hydramax clutch with Centerforce Dual friction
    8 3/4 with Moser axles, Auburn Pro LSD, Yukon 3.55 Gears, 489 case with crush sleeve eliminator
    Xhd Mopar leaf springs
    Kyb shocks
    Stock 318 V8 torsion bars
    3 inch exhaust with turn downs at axle
    4 wheel drum brakes

    So what do we think it'll run? :)

    Also any suggestions for launch rpm? It's got a 2 step so I'll set it at the recommended rpm

    It gets dyno tuned on the 20th of this month so i hope to be out at the track within a week or two of getting it tuned.
     
    Last edited: Jun 12, 2018
    • Like Like x 1
    • 604B1duster

      604B1duster Well-Known Member

      Messages:
      1,127
      Likes Received:
      391
      Joined:
      Dec 30, 2007
      Local Time:
      10:31 AM
      11.70s @ 117
       
      • Agree Agree x 5
      • yellow rose

        yellow rose Doctor of Thinkology.

        Messages:
        16,597
        Likes Received:
        12933
        Joined:
        Jun 19, 2015
        Location:
        Living on the razors edge
        Local Time:
        9:31 AM
        You have an assload of clutch. And no way to tune it. Your shocks leave about everything to be desired. Not sure of MT nomenclature but that looks like a radial tire.

        So your tires will hate an assload of clutch, untunable shocks and most likely a 9.45 overall first gear. That's if you have a 2.66 first gear box. If it's a 2.44 first you will have a 8.66 overall first gear which is powerglide and less first gear.

        I'd skip the two step and slide the clutch like a mutha humpa at the starting line. The last thing you will want to do is beat the crap out of the tire.

        You have enough HP to run low, low 11's if you can make the chassis happy.

        Not bashing your stuff. It just looks to me like you've got a lot of parts that will hate each other, and really no way to tune it.
         
      • 604B1duster

        604B1duster Well-Known Member

        Messages:
        1,127
        Likes Received:
        391
        Joined:
        Dec 30, 2007
        Local Time:
        10:31 AM
        17ECD174-85BB-4299-A41A-6603D6BDCFBF.jpeg I thought I read ST not SS.
        I think this is the tire he has, it’s bias ply
        Might hook after all
         
      • 1963dartgt

        1963dartgt Well-Known Member

        Messages:
        502
        Likes Received:
        142
        Joined:
        Nov 7, 2015
        Location:
        CA
        Local Time:
        11:31 AM
        I dont know how fast you'll go, I just hope you can stop with those drums.
         
        • Agree Agree x 1
        • bOb shingler

          bOb shingler Well-Known Member

          Messages:
          3,255
          Likes Received:
          154
          Joined:
          Jun 8, 2007
          Location:
          warrenton, north carolina
          Local Time:
          12:31 PM
          12.80
           
          • Like Like x 1
          • roccodart440

            roccodart440 Well-Known Member

            Messages:
            5,099
            Likes Received:
            4071
            Joined:
            Apr 19, 2010
            Local Time:
            12:31 PM
            the gears are going to be the biggest problem.

            I have a similar combo with an overdrive. I have 4.56 gears. I run low 11.70@114 in 3rd, 12.20's in OD.

            I'm guessing you'll go 12's
             
          • 68Dart500

            68Dart500 Well-Known Member

            Messages:
            278
            Likes Received:
            192
            Joined:
            Oct 24, 2017
            Location:
            USA
            Local Time:
            11:31 AM
            These are the tires I've got:
            Mickey Thompson 3454: ET Street S/S Radial Tire P295/55R15 | JEGS

            I was going to go with a bias ply but I was afraid of the tire growing with how close I am to my front wheel well opening.

            I did just order a disc brake setup for the car but it came in with some wrong parts so I returned it and I',m on the hunt for a new disc brake conversion kit. Ideally I'd like to find one and get it installed before I take it to the track next month.


            When you say slide the clutch you mean feather it and let is slip at the line a little or are you meaning dump it at like 5k rpm? Are there clutches you can tune/adjust?

            Mines the 2.47 gear set for my A833 (3 groove gears)
             
            Last edited: Jun 12, 2018
          • 451Cuda

            451Cuda Well-Known Member

            Messages:
            1,863
            Likes Received:
            593
            Joined:
            Nov 19, 2008
            Location:
            Port-aux-Français, TF
            Local Time:
            11:31 AM
            low 12s to high 11s at 115-120
             
            • Agree Agree x 1
            • 604B1duster

              604B1duster Well-Known Member

              Messages:
              1,127
              Likes Received:
              391
              Joined:
              Dec 30, 2007
              Local Time:
              10:31 AM
              Get a wilwood kit for either 9 or 10 in drum, whichever you have.
               
              • Agree Agree x 1
              • roccodart440

                roccodart440 Well-Known Member

                Messages:
                5,099
                Likes Received:
                4071
                Joined:
                Apr 19, 2010
                Local Time:
                12:31 PM
                How close is the tire to the well? You can space it back.

                They don't grow as much as you think
                 
              • 68Dart500

                68Dart500 Well-Known Member

                Messages:
                278
                Likes Received:
                192
                Joined:
                Oct 24, 2017
                Location:
                USA
                Local Time:
                11:31 AM
                Do you need to switch to 15's for a Wilwood kit? I saw Wheel Vintiques had the 15x3.5 steel dog dish rims for sale but they are like 208 bucks a piece!

                I can't say for sure because I just finished painting the rims so the tires will be getting mounted in the next day or two but from preliminary measuring it looks like it'll be very close. If I were going to get a bias ply what kind are most people running in a 28x12.5R15 or something similar in size? This car will be 85% street driven and 15% track.
                 
              • 604B1duster

                604B1duster Well-Known Member

                Messages:
                1,127
                Likes Received:
                391
                Joined:
                Dec 30, 2007
                Local Time:
                10:31 AM
                I was looking at those wheels(15x4). and center bore is only 2.875, not positive but I think you need 3in with wilwood, be careful what you order. BTW nice looking dart, great color combo
                 
                • Thanks! Thanks! x 1
                • 1963dartgt

                  1963dartgt Well-Known Member

                  Messages:
                  502
                  Likes Received:
                  142
                  Joined:
                  Nov 7, 2015
                  Location:
                  CA
                  Local Time:
                  11:31 AM
                  • Like Like x 1
                  • mbaird

                    mbaird mbaird FABO Gold Member

                    Messages:
                    4,451
                    Likes Received:
                    1593
                    Joined:
                    Dec 10, 2005
                    Location:
                    boise, Id
                    Local Time:
                    10:31 AM
                    I ran an O.D 833 in Dart Sport and loved it ! 4.10s and I could cruise the hwy then race 1-3... cut some 1.60 60fts and high 12s with a mild 340 build.
                    90% Street driving so I didnt mind the 1-2 gap.
                     
                    • Like Like x 2
                    • roccodart440

                      roccodart440 Well-Known Member

                      Messages:
                      5,099
                      Likes Received:
                      4071
                      Joined:
                      Apr 19, 2010
                      Local Time:
                      12:31 PM
                      YOu can easily shim the front shackle.

                      My favorite street tires are sportsman pros. Bias ply, good in the rain, great traction on the street and at the strip.

                      I run them tubeless at 25 street, 18 strip.
                       
                      • Like Like x 1
                      • 68Dart500

                        68Dart500 Well-Known Member

                        Messages:
                        278
                        Likes Received:
                        192
                        Joined:
                        Oct 24, 2017
                        Location:
                        USA
                        Local Time:
                        11:31 AM
                        My springs were moved into my frame when I mini tubbed it so I can't shim the front mount. Hopefully I'll just be happy with my radial tires and I won't need to worry about a tire change just yet. My wife might not be too happy if I tell her my brand new tires need to be replaced :elmer:
                         
                      • 604B1duster

                        604B1duster Well-Known Member

                        Messages:
                        1,127
                        Likes Received:
                        391
                        Joined:
                        Dec 30, 2007
                        Local Time:
                        10:31 AM
                        Lol
                         
                      • 604B1duster

                        604B1duster Well-Known Member

                        Messages:
                        1,127
                        Likes Received:
                        391
                        Joined:
                        Dec 30, 2007
                        Local Time:
                        10:31 AM
                        Be careful if you run it with front drums.
                        I ran 12.0s with front drums and didn’t have a problem, but sometimes they try to put you in the ditch.
                         
                      • mbaird

                        mbaird mbaird FABO Gold Member

                        Messages:
                        4,451
                        Likes Received:
                        1593
                        Joined:
                        Dec 10, 2005
                        Location:
                        boise, Id
                        Local Time:
                        10:31 AM
                        I am doing a near identical build right now using a solid roller and W2s.
                        Seems like a pretty wide Drag Radial. Not sure what will happen if you dead hook ?
                        Stopping wont be a problen since you run a 4 speed and can use the gears to decellerate.
                        I plan on running a 245/60 15 SS radial due to space limitations.
                        Looking forward to hearing how yours works out.
                         
                      • yellow rose

                        yellow rose Doctor of Thinkology.

                        Messages:
                        16,597
                        Likes Received:
                        12933
                        Joined:
                        Jun 19, 2015
                        Location:
                        Living on the razors edge
                        Local Time:
                        9:31 AM


                        Yes, feather it. I doubt you can drop the clutch at any RPM and not have an issue.

                        There are adjustable clutches out there. For you, I'd suggest looking into the clutch tamer. Guy on here makes them. You can at least control the application of the clutch with it and IIRC they ain't too expensive. The guy goes by weed burner on here but if you google clutch tamer you can find him.


                        That overall first gear is a tough nut to crack. Like I said...you have a first gear that is very tall. I make less power than you and I have a 14.09:1 first and could probably use a bit more. With a 2.47 you have an 8.77 first gear. Just getting a 2.66 first gear box would give you a 9.44 first and that's better than what you have.

                        You picked a tough combo to tame.
                         
                      • mbaird

                        mbaird mbaird FABO Gold Member

                        Messages:
                        4,451
                        Likes Received:
                        1593
                        Joined:
                        Dec 10, 2005
                        Location:
                        boise, Id
                        Local Time:
                        10:31 AM
                        I will be running a 3.09 1st and 3.91s.
                        Clutch tamer is a good idea which combined with your 2 step msd would help launch.

                        Anyone can run an auto... it takes a real Masochist to run a 4speed ...lol
                         
                        • Like Like x 1
                        • roccodart440

                          roccodart440 Well-Known Member

                          Messages:
                          5,099
                          Likes Received:
                          4071
                          Joined:
                          Apr 19, 2010
                          Local Time:
                          12:31 PM
                          CHeck out the RMS mini tub front shackles. See if you have enough meat to do something like that. I used them on my current car. They allow the rear to be moved up or down, front or back 1.5"

                          4 holes instead of 2.
                           
                        • MichaelB.

                          MichaelB. Well-Known Member

                          Messages:
                          184
                          Likes Received:
                          149
                          Joined:
                          Mar 29, 2008
                          Location:
                          Central US of A
                          Local Time:
                          11:31 AM
                          Its just a guess (and you will need to be a hell of a shifter) but I am rooting for you...

                          11.20 @115
                           
                        • 68Dart500

                          68Dart500 Well-Known Member

                          Messages:
                          278
                          Likes Received:
                          192
                          Joined:
                          Oct 24, 2017
                          Location:
                          USA
                          Local Time:
                          11:31 AM
                          Thanks for all the tips and suggestions so far folks. I'm starting to wonder if I should exchange my radial ET Street SS tires for some bias ply MT sportsman Pro ET tires (2 ply wrinklewall)? I talked to summit and being I haven't mounted my other tires onto the rims yet (that was going to happen this week) they said I could exchange them. Thoughts? It looks like I'd need to run tubes then as well and drill out my valve stem hole to 5/8.

                          Here's the tire: Mickey Thompson Sportsman Pro Tires 90000000208
                           
                          • Like Like 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.