Post 11 second small block combos

Mopar Racers Forum

  1. Toluene56

    Toluene56 Well-Known Member

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    Update ish..
    11.72@114.12 @ 7,859ft DA...still all steel minus back seat.
     
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    • 12many

      12many Well-Known Member

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      What top end stuff did you break??
       
    • Toluene56

      Toluene56 Well-Known Member

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      Few things... But the one that really pissed me off was the helicoils for the rocker shafts were pulled out and Bam. Not gonna use bolts again. lol
      IMG_20190527_151012657_HDR.jpg
       
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      Holy snikes!!!!
       
    • 12many

      12many Well-Known Member

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      What was your assessment? Soft aluminum, poor threading and helicoiling? Not enough bolt thread engagement?
       
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      • Toluene56

        Toluene56 Well-Known Member

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        I'm guessing poor threading and helicoil.. I threw the heads in a box, i'll trya nd fix them later, maybe i'll get lucky and use them on another engine.
         
      • 12many

        12many Well-Known Member

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        What were the springs, cam lift and rocker ratio specs you were running? Thanks
         
      • Toluene56

        Toluene56 Well-Known Member

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        Howards solid roller, .640/.645 1.5 rockers.. can't remember the springs, but they were even on the light side for a solid roller cam.
         
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        • Landy Duster

          Landy Duster Well-Known Member

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          73 Duster , former drag car, converted back to a street car, front seats only. 3240 pounds with me and a full tank of E85. Stock bottom end 318 Magnum, 150k not rebuilt, $150 Craigslist shortblock. GT45 turbo, 2-1/8” OD crossover. Stock cracked heads (they didn’t leak with alcohol in the chambers), kegger intake, stock throttle body. Megasquirt 1 controlling fuel only lean burn distributor to lock timing at 20 BTDC, MSD 6-AL. Comp shelf cam,(.506 lift with 1.6, 216 224 @.050, 114 LSA, better valve springs, ARP head studs, Cometic head gaskets. PTC 9.5” 904 converter, A999 trans, 8-3/4” with 3.23 gear 35 spline spool, 35 spline Strange axles. Mini tubbed poorly, springs relocated, Cal Tracs, split mono-leafs. Stock rear shackles. Stock tank with 1/2” pick up and a 3/8 return. 80 lb hr injectors, AEM 430 E85 pump. 3/8” supply and return lines. Non intercooled, car is not cut. Mickey ET Streets 325-60-15.

          Slip is on 20 psi. Ran 121.63 on 15 psi.

          EE5EDCC7-B354-4431-BAD6-243C47A0EA5B.jpeg
           
          Last edited: Mar 6, 2020
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          • Landy Duster

            Landy Duster Well-Known Member

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            11.48 pass on 15 psi.

             
          • Landy Duster

            Landy Duster Well-Known Member

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            I do have to make a correction, right now I have the PTC converter in, during these passes there was what I think is a 4500 stall j converter. I sort of blow thru it in the video, hopefully it won’t be as bad and I make a 10 second pass with the Craigslist engine.

            Eventually I will build a better engine (goal is a low low 10 second car in hot weather) with forged pistons, better rods and a forged stock stroke crank.
             
          • rumblefish360

            rumblefish360 So close, yet so far away FABO Gold Member

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            What size turbo?
             
          • Landy Duster

            Landy Duster Well-Known Member

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            69mm compressor, 83mm turbine I believe, $200 China turbo.
             
            Last edited: Mar 8, 2020
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            • 70aarcuda

              70aarcuda Master Hoader of SBM FABO Gold Member

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              1975ish Duster....has 70-71 front grill and bumper on it...

              360 .030 with seal power h116cp pistons...5/64 ring pac
              Chinese cornoavirus free h beam rod....725 grams
              Speedmaster CNC bare....local machine shop did valve job
              PAC 1903 springs....
              Speedmaster 2.02/ 1.60 valves.
              Speedmaster steel retainers and locks
              MP 571 oval cam shaft...P4529973
              Crane 1.6 intake 1.5 exhaust
              Holley SD with QFT 750 dp on E85
              MP race electronic distributor with msd 6l
              TTi 1 5/8 stepped headers
              TF 904 with 2.74/1.54 gears....8 3/4 4.30 rear gears
              8 inch converter...ptc i think...lol
              9 x 28 mt slicks.....
              3000 lbs with driver....still has heavy rear bumper...

              Ran 11.192 at 118,56.....probably a 10.90 at sea level....
               
              Last edited: Mar 12, 2020
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              • rumblefish360

                rumblefish360 So close, yet so far away FABO Gold Member

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                What did you have for cylinder heads and any work to them?
                 
              • Mopar Sam

                Mopar Sam Well Fed Member

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                If you get any parts wrapped in bubble wrap, don't pop it! You don't know what might be in it...
                 
              • 70aarcuda

                70aarcuda Master Hoader of SBM FABO Gold Member

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                I updated the engine specs....
                and the rods were in plastic bags...have had them over 5 yrs now...
                 
              • w2dodge

                w2dodge Well-Known Member

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                I haven't been on in a long time....69 swinger ...factory 340 4sp....well that was many years ago...lol...
                340 with: 318 dump truck crank...JE pistons 11:1..factory rods... .20 over...roller comp cam .605 lift..crower lifters.
                W2 race heads..2.02 Manley valves..I ported and polished them...mopar intake..750 holley...
                904 trans...4.88 moser axles..3200lbs...
                just tested once at Atco many years ago...she ran 11.50s 116mph easily...with mufflers and 275 M&H street slicks...I think she might see 10.90...she ran lean I jetted it and it needed more...I figured open headers use the trans brake...and slicks...and a 850...
                 
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