71 Dart / 5.9 Magnum / Procharger

Discussion in 'Forced Induction Mopar' started by Walker434, Jun 27, 2018.

  1. Walker434

    Walker434 Well-Known Member

    Messages:
    749
    Likes Received:
    304
    Joined:
    Aug 29, 2012
    Location:
    Nashville, TN
    Local Time:
    6:11 PM
    I'm running 10 lbs of boost. Using the Wallace racing calculators I've added approximately 100 horse to the crank. Was hoping for an addition of 200 horse at the crank with 10 lbs. Again, hoping the exhaust might make a big difference.
     
  2. snailpower

    snailpower Well-Known Member

    Messages:
    248
    Likes Received:
    198
    Joined:
    Jan 15, 2016
    Location:
    Los Angeles
    Local Time:
    4:11 PM
    Awesome build! will def be following.
     
  3. rdakota340

    rdakota340 Well-Known Member

    Messages:
    280
    Likes Received:
    21
    Joined:
    May 16, 2010
    Location:
    Heart Of Fla.
    Local Time:
    7:11 PM
    The centrifugal chargers tend to take a percentage of HP but a 100 horse power is a pretty good gain.
     
  4. Walker434

    Walker434 Well-Known Member

    Messages:
    749
    Likes Received:
    304
    Joined:
    Aug 29, 2012
    Location:
    Nashville, TN
    Local Time:
    6:11 PM
    Time for an update. Took it to the track on Saturday. This is with the new TTI 1 7/8 Race headers. Had some good air, it went 7.16 at 96.97 MPH. Got to love the boost. The Fox Body Mustang in the other lane got me on the tree but when the boost kicked in I drove around him.

    Dart 22.jpg
     
    • Like Like x 5
    • mderoy340

      mderoy340 Well-Known Member

      Messages:
      1,923
      Likes Received:
      620
      Joined:
      Aug 2, 2012
      Location:
      Melbourne FL
      Local Time:
      7:11 PM
      Glad to see you are getting dialed in! Enjoy the fun.
       
      • Thanks! Thanks! x 1
      • rdakota340

        rdakota340 Well-Known Member

        Messages:
        280
        Likes Received:
        21
        Joined:
        May 16, 2010
        Location:
        Heart Of Fla.
        Local Time:
        7:11 PM
        Yes sir it's coming around glad you are having some fun with it get a 2 step on it and see if that will help on your 60'.
         
      • Walker434

        Walker434 Well-Known Member

        Messages:
        749
        Likes Received:
        304
        Joined:
        Aug 29, 2012
        Location:
        Nashville, TN
        Local Time:
        6:11 PM
        Well, I've got bad news. Went for a Sunday drive in the Dart with my wife. Of course we had a few wide open blasts as usual. Got back home and the car was smoking really bad. Only out of the driver's side tail pipe. I currently don't have an X or H pipe so I'm sure I've hurt something on that bank. Still sounds great, not missing but I'm afraid I've broken a piston at the ring land on one cylinder?

        That was my fear with this junkyard magnum shortblock. I should have taken the time to tear the engine down and open up the ring gaps. This is just a hunch but it's smoking BAD out of that one tailpipe. I'll do a compression check on all cylinders when I have time. That should tell me which one is having problems.

        I'm glad racing season is almost over and the weather is starting to turn. Also, I've been planning a new stroker build anyway... one built for boost this time! I'll keep you guys posted when I do the compression check. Looks like I'll pulling this engine and trans this winter. Stay tuned.
         
      • dusted

        dusted FABO Gold Member FABO Gold Member

        Messages:
        210
        Likes Received:
        126
        Joined:
        Sep 24, 2006
        Location:
        Creedmoor, NC
        Local Time:
        7:11 PM
        Sorry to hear, my guess is #5 and I bet it detonated and cracked the piston Doubtful the rings butted.
         
      • subcom

        subcom Well-Known Member

        Messages:
        1,136
        Likes Received:
        284
        Joined:
        Sep 17, 2010
        Location:
        South Florida
        View My Photos
        Local Time:
        7:11 PM
        That sucks! Pull the heads and see what happened. If not too bad, replace the piston (it that is what it is, and assuming the cylinder isn't trashed) with a stocker and slam it back together. You could still use it as a sacrificial motor to get your tune squared away while building your stroker.
         
        • Agree Agree x 1
        • Walker434

          Walker434 Well-Known Member

          Messages:
          749
          Likes Received:
          304
          Joined:
          Aug 29, 2012
          Location:
          Nashville, TN
          Local Time:
          6:11 PM
          Finally had time to compression check this afternoon. Passenger side bank was normal as expected. All plugs looked good and they went between 145 lbs to 155 lbs.

          Driver is side #1 and #3 look pretty normal and were also in the 145lb range. #5 only went 100lbs and plug was very oil rich. #7 only went 100 lbs and was horrible looking! That thing is pumping oil, picture attached is #7 plug.

          Thoughts?

          #7 Plug.jpg
           
        • mderoy340

          mderoy340 Well-Known Member

          Messages:
          1,923
          Likes Received:
          620
          Joined:
          Aug 2, 2012
          Location:
          Melbourne FL
          Local Time:
          7:11 PM
          Time for tear down. Broken piston or ring would be my guess. How much blow by is in the crankcase?
           
        • Walker434

          Walker434 Well-Known Member

          Messages:
          749
          Likes Received:
          304
          Joined:
          Aug 29, 2012
          Location:
          Nashville, TN
          Local Time:
          6:11 PM
          Lots of smoke out of drivers side tailpipe and LOTS of blow by in the crankcase.
           
        • mderoy340

          mderoy340 Well-Known Member

          Messages:
          1,923
          Likes Received:
          620
          Joined:
          Aug 2, 2012
          Location:
          Melbourne FL
          Local Time:
          7:11 PM
          I broke an exhaust valve head and when that hyper piston shattered the wrist pin hammered two holes in the bore. No more chevy rockers and hyper pistons for me. I went back to LA motor and forged assembly.
           
        • dusted

          dusted FABO Gold Member FABO Gold Member

          Messages:
          210
          Likes Received:
          126
          Joined:
          Sep 24, 2006
          Location:
          Creedmoor, NC
          Local Time:
          7:11 PM
          Don’t be surprised to find a blown headgasket. My car had the same symptoms once.

          B58A43BA-3F99-40C3-939A-65567F560740.jpeg
           
          • Like Like x 1
          • Walker434

            Walker434 Well-Known Member

            Messages:
            749
            Likes Received:
            304
            Joined:
            Aug 29, 2012
            Location:
            Nashville, TN
            Local Time:
            6:11 PM
            It will be a few weeks before I have time to pull this thing. Can't wait to investigate and see what happened. Hopefully nothing too serious because this engine is going into my wife's 65 Barracuda. Back to NA for her and my stroker will get the Procharger.
             
            • Like Like x 1
            • rdakota340

              rdakota340 Well-Known Member

              Messages:
              280
              Likes Received:
              21
              Joined:
              May 16, 2010
              Location:
              Heart Of Fla.
              Local Time:
              7:11 PM
              I bet you blew a head gasket like Dusted said that is the issue I had and it lifter galley side is the weak link it will blow before the rings butt together.
               
              • Agree Agree x 1
              • Walker434

                Walker434 Well-Known Member

                Messages:
                749
                Likes Received:
                304
                Joined:
                Aug 29, 2012
                Location:
                Nashville, TN
                Local Time:
                6:11 PM
                I hope you guys are right. That would be much easier than replacing a piston or two.