71 Dart / 5.9 Magnum / Procharger

Forced Induction Mopar

  1. dadodgekid

    dadodgekid When in doubt... floor it FABO Gold Member

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    10.68 i believe.
     
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    • dusted

      dusted FABO Gold Member FABO Gold Member

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      I had to leave before he ran. There were lots of A-Bodies. Freiburger made a joke that it was the most darts he had seen! Good luck guys!

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      • Walker434

        Walker434 Well-Known Member

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        It was good to meet you Dusted. Thanks for posting a few pics. Best pass all week was 10.43 @ 119. I chased ignition troubles all week that ended up being the MSD Box. Once I got that replace I lost 2nd gear. Last day, it went 10.45 @ 129 shifting directly from 1st to 3rd. Transmission troubles ended up being band adjustment. Now I have all three gears and haven't been back to the track. I hope to get this thing in the 10.15 range before the end of the season. Drag week is like murphy law. Still had a blast and averaged 10.68 for the week. Not too bad.

        Drag Week 5.jpg

        Drag Week 9.jpg

        Drag Week 12.jpg
         
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        • dusted

          dusted FABO Gold Member FABO Gold Member

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          I give you huge thumbs up for completing the entire event with minimal setbacks. Well engineered. I watched the live stream everyday to see who was still in. I had a blast the first day and I was just spectating!
           
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          • Walker434

            Walker434 Well-Known Member

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            Okay guys, finally getting the tune dialed in on the Dart. Went down to a MoparVSBrandXshowdown in Alabama. Went 6.42 @ 106 MPH in the 1/8th mile. Wish it would have been a 1/4 mile track because that would have been a VERY low 10 second run. Best of all I beat a big block, big tire, gutted, wheelie bar having straight up drag car. Awesome and cool car by the way just wasn't as quick as I thought it would be. Starting to love the boost. It's sooo driveable.

            Dart 41.jpg

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            Dart 43.png
             
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            • dusted

              dusted FABO Gold Member FABO Gold Member

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              Man, That’s flying for a true “street” car! Keep up the good work!
               
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              • Stephen Hotz

                Stephen Hotz FABO Gold Member FABO Gold Member

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                Grats, how was the event? Would have loved to attend.
                 
              • rdakota340

                rdakota340 Well-Known Member

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                Congrats just a tune away from better ET's a boosted car is always a tuning process.
                 
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                • stixx

                  stixx Well-Known Member

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                  That's a really good .60 for a 'street car'!
                   
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                  • Walker434

                    Walker434 Well-Known Member

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                    The event was a ton of fun. Weather could have been better but still a blast. You should try to make it next year. He already announced it's going to be 10/10/2020.
                     
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                    • Walker434

                      Walker434 Well-Known Member

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                      Okay guys, the last pass I made down in Alabama the car slowed down a bit. I had hot lapped it so I didn't think much of it. The Next day when I was unloading the car off the trailer it was missing. I pulled the plugs and the #5 cylinder's spark plug looked like the picture below. Ground strap had been punched into the electrode. I borrowed my friend's bore scope and there was evidence that something had been in the cylinder but was no longer there. We checked the compression and it was good, same as the other cylinders. Can't figure out what could have gotten in there. Carb looks normal, hat, ect. I checked every tooth on the procharger…. everything looks good. I checked the vale lash and all was normal.

                      So, I thought it must have somehow sucked something in that cylinder but then spit it out the exhaust valve. I swapped to colder spark plugs and have been driving on the street a few days with no problems. However I have been driving like miss daisy not getting on it. Since racing season is over around here I decided to get on it yesterday to see if I still have problems. Sure enough, heard a pop on the 1-2 shift and shut it down. It was missing. Limp back to house and once again my #5 plug had the ground strap mashed into the electrode.

                      Any ideas? If it were the piston hitting the plug would the scars on the piston be in the same place? Could something still be in that cylinder I just haven't seen it with the bore scope? You would think if something were in the cylinder it would be loud at idle. This thing sounds completely normal at idle and low RPM. I'm baffled. I'm going to bore scope it again but If I can't find anything I guess I'll pull the engine back out and inspect everything.
                       

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                    • 70Roadkill

                      70Roadkill Well-Known Member

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                      Hey Cody, what did you find out?
                       
                    • Walker434

                      Walker434 Well-Known Member

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                      Pulled the engine. When I got the heads off 7 out of 8 pistons were hurt. Turns out 27 degrees of timing and pump gas was causing detonation during drag week. Once I realized I started adding race gas and backing off the timing but it must have been too late. I think the engine was finally happy at around 22 degrees of timing with a 50/50 mixture of 110 and 93 pump gas but by then the damage was done.

                      Luckily it appears the pistons were all that was hurt. The rings were gapped at .022 top and .024 bottom. I'm thinking this was too tight and the rings butted together exploding the tops of the pistons. Everything else looks good so I've ordered new pistons and will gap the rings bigger. Any suggestions on the gap? This is 10 lbs of boost.
                       
                    • 70Roadkill

                      70Roadkill Well-Known Member

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                      Here’s a guide you can use, there maybe other charts that you can use. Just google ring gap for boost

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