Did it go in the 8's?

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  1. dvw

    dvw Well-Known Member

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    Today was the day. Very nervous about everything after the big Kaboom. My son Scott came with me and helped tune. Well it went down the track. Didn't spit any parts out. Weather was hot for May in central Michigan, 88-90. Baro was 28.9x all day. Correction factor 8-9% (roughly 75-80 HP off corrected dyno number). Started off with a spinning 9.179@146.12. 86 jets, 34 degrees timing. Not really what we looking for. newly revalved shocks up front. Car had zero rotation. Left flat as a pancake. The front rebound was actually looser than Afco had suggested. Checking the rear shocks, I had the rebound on the right rear full tight. Straightened that out for a near duplicate run #2 9.174@145.04. Pull the timing back from 34 to 32 for run #3. Well that didn't work. Clean cut no heat on the strap and lean popping on the top end, 9.209@143.5. Video showed the housing bouncing back up into the car as well. Upped the rear compression 2 clicks, up 4 jet sizes to 90's and bumped the timing to 35,. Lots of changes at once but we've got to fix it, 9.149@147.42. Better loosened the front rebound 5 clicks, 9.091@147.95. Loosened the fronts another 5 clicks and bumped the timing to 36. Started the car and a LOUD knocking. Scott is waving at me not to worry. My buddy yells at him "put the spark plug back in". Heart attack moment. Got that straightened out as he was looking for the timing mark on the strap. When up for the pass. It pulled the wheels for the first pass today, not much but we're getting closer. D/A 3778, First 60 ft today in the 1.20's 1.293 / 5.742@120.53 / 9.028@149.10. Ready for one last pass the battery charger failed. So all in all pretty good. We can make it hook. Didn't get aggressive enough loosening the front early in the day. But after last years wheelie oil pan smashing fiasco caution was the word. We also talked about the cam being backed up may have some bearing on the 60 ft. I have some larger jets coming. We will continue to loosen the front. The 8 is coming.
    Doug

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    • oldkimmer

      oldkimmer FBBO Gold Member FBBO Gold Member

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      Sweet, your gonna get there on your next pass. Kim
       
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      • RemCharger

        RemCharger Well-Known Member

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        Excellent work! So what do you think the different fuel request is from?
         
      • dvw

        dvw Well-Known Member

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        Never had a chance to jet it last year before it broke. With the Eddy carbs, 34 degrees was not much improvement over 32. The cam is pulled back from 108 to 111. That may have affected it as well. My bet is it may need even more jet. Especially when the air gets better. The timing mark on the strap is close, might be able to go one more degree. The best run of the day was the worst air.
        Doug
         
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        • Endangered Species

          Endangered Species Well-Known Member

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          Sounds like you're going to be in the 8's for sure. Great Job!!!
          Why do you think it want's so much jet? 90 jets are like Dominator territory.
           
        • dvw

          dvw Well-Known Member

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          Don't know. I'll talk to Mark Whitner today. My friend Kyle does alot of tuning for drag race customers at Roush. He told me it was popping at the top end. My hearing sucks so I couldn't hear it. When we checked the plugs it obviously wasn't rich. Kyle told me it has to be up around 14-1 A/F to cause misfire. He also gave us a good rule of thumb. 4 jet sizes is worth about 1 point of A/F ratio. Same with timing. Never ran 36 before. It wants what it wants.
          Doug
           
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          • Endangered Species

            Endangered Species Well-Known Member

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            Interesting 14-1 is when misfire starts.
            You're right...It want's what it wants, it's defiantly making power. I'd just be curious why it wants so much jet in the heat.
             
          • dvw

            dvw Well-Known Member

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            Kyle has worked on a lot of interesting stuff for Jack. He crew chiefed Jacks daughter Susan when she started racing. Has crew chiefed The Candies Brothers S/S cars. Worked on Tommy Kendalls GT1 road race car. Also he and partner Rock Hass run two very successful S/C dragsters and S/G Corvette. Many time national event winners.
            Doug
            rock.jpg
             
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            • Jet Doc

              Jet Doc Well-Known Member

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              Nice job Doug!
               
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              • Budnicks

                Budnicks You Can Just Thank Me Later FBBO Gold Member

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                It will come...

                so close, good air/RAD good track
                jets AFR correct

                you'll get there
                 
              • malex

                malex FBBO Gold Member FBBO Gold Member

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                8’s are definitely right there in the air. Going to be some nice new personal bests coming with a touch more fine tuning.
                 
              • Gunner1

                Gunner1 Well-Known Member

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                WOW It's too pretty to be so fast. Awesome car.
                 
              • Hemirunner

                Hemirunner Well-Known Member

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                Great job tuning on that thing, it flies!
                 
              • fullmetaljacket

                fullmetaljacket Well-Known Member

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              • fullmetaljacket

                fullmetaljacket Well-Known Member

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                Good air and you're there if you dare.
                 
              • Charger 770

                Charger 770 Active Member

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                Well done Doug, it's credit to your persistence, commitment and focus !

                That 8 will be there in better air. :thumbsup:
                 
              • Nxcoupe

                Nxcoupe Well-Known Member

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                So close, frustrating I know, but you'll get there. I'd kill for your first half numbers. My car went 1.7 60ft, 6.1 1/8 @ 124 and a 9.3 at 155 on the back end. Stock truck converter on mine, lol. Keep at it! Beautiful car.
                 
              • dvw

                dvw Well-Known Member

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                I'll take you MPH
                Doug
                 
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                • Nxcoupe

                  Nxcoupe Well-Known Member

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                  I bet! Hair driers really get the moh up there.
                   
                • MarPar

                  MarPar If it weighs, it pays. FBBO Gold Member

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                  I would say quite a successful first run there, Doug. Easily get into the 8's.

                  impala popcorn.gif

                  Mario
                   
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