Post your 12 second small block combos

Mopar Racers Forum

  1. moparraceman

    moparraceman Well-Known Member

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    15 YEARS AGO this was race only got lucky on combo no one could figure out why it ran so fast 63 dart sedan 70 stock 340 short block with 528 solid lifter cam good set of cast heads . portosonic intake ,800 race carb ,tci 5500 convertor ,hooker 15/8 fender well headers 410 83/4 spool 30x9 slicks 11.50 s with 1.55 60 ft 114mpr ran on pump gas building a 63 dart hard top now trying to duplicate everything that was in that car but know now it wont run as fast as that one did LOL
     
  2. TheTieWrapKid

    TheTieWrapKid Well-Known Member

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    Probably 15 years ago my 69 Dart 340 - 4speed hays clutch 528 solid mopar cam straight up ( by the marks maybe ) ,reground cast crank, recon stock rods, 11.5 to 1 dome pistons ( Mopar Performance ), cylinder cranking pressures of 175, rebuilt 2.02 / 1.60 heads port matched plus a little grinding but no bowl work, weiand x-celerator intake , 850 dp Holley, 1 5/8 Blackjack headers alumakoted, Mallory unilite, 4.88 gear , 9 x 28 MT slicks , superstock springs, pinion snubber, air shocks, adjustable Koni fronts , 2900 plus 205 driver. 13.03 104.9 - - 8.35 or so 1/8 mile. I went in and home ported the heads and the intake a few years back. Ran a 8.03 eighth mile with what I finally figured out was a bad clutch. I do have a new clutch and flywheel now. Hasn't hit the track in nearly 3 years. The closest track shut down. Anyway it should go 7s and 12 now. Maybe I'll find out some time ! I could toss a 100 shot of NOS on there, although I would be in trouble for the no roll bar or something.
     
    Last edited: Mar 8, 2017
  3. JBurch

    JBurch Well-Known Member

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    My third version "Teener" in my 65 Barracuda:

    Same short block as first version teener, 360 heads radically angle milled to achieve 45 cc chamber, 2.02, 1.6 valves, Comp XTQ281s-6 solid lifter cam, Eddy Torquer II intake, 750 Holley DP carb, Thorley "D" Dart headers, 904 tranny with reverse manual valve body, converter that was supposed to stall at 4800 rpm behind a 360, 8 3/4 with 5.13 gears, M/T 275/60x15 drag radials.

    12.54 at 107.61, 1.88 sec 60ft
     
  4. WA71swinger

    WA71swinger Well-Known Member

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    Car I worked over to run this year. 67 valiant. While trying to get the big block back together for my 71 Dart. 70's 360LA motor. KB 107 pistons. J heads hogged all the way out with 2.02/1.6 chebby long stem/stock diameter valves for .554 lift Hughes hydraulic flat tappet cam (no longer available). 273 adjustable rockers. 1 5/8 chassis headers through the mufflers and back to before rear axle. MSD ignition. MSD 6a box. 700 Holley DP with manual secondaries and no choke. Performer RPM air gap. Fuel cell with 1/2 fuel lines. Holley blue fuel pump with regulator set to just under 6 psi. Electric water pump pulley and no alternator. Battery relocated to trunk (78 pound AGM battery). 727 with forward pattern manual valve body. 3500 stock diameter converter. Interior stripped. Full original sheet metal car. Roll cage with driver's door swing out arm (not NHRA certified). Welded subframe connectors. 2 race seats. 8 3/4 with 391 spool. Lots of leaf spring clamps with old school slapper bars. Pinion angel set with shims (car sits very low front and rear). 26X8.5 MT drag radials. I've got $5500 into the project car included. Best of 12.694 @ 106.59. Shifting with shift light set at 5300. Coming across the stripe at just under 6K. 1.76 60 foot. Switched to a HP 750 DP out of the box (having float issues with 700 DP and runs were inconsistent) and have run about 40 passes between 12.79 and 12.85. Have not turned a screw or jets or anything to new carb this season. Trying to do everything the same for consistency. Last weekend out I ran 13 passes at 12.84 to 12.85. Out in the first round both nights getting treed. .053 reactions time not good enough even running my time with a .003. (12.853 on a 12.85 dial in). Next night out in first round again. Got treed. .080 reaction time. Ran the number with an 8 (12.858 on a 12.85 dial in). Damn the competition is getting stiff LOL. Used to be that was good enough in the first round. Not these days.
     
  5. KnuckleDuster

    KnuckleDuster Well-Known Member

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    * Just saw "Stock Stroke', sorry, after all that typing, ignore it if you don't want to know...

    ;-)


    1972 Duster 340
    Buckets and console with full interior.
    Frame connectors and driveshaft loop.
    Full 2.5" exhaust, Jegs kit, Flowmaster 40's, Pypes exhaust tips.
    3505 lbs with full tank, spare tire on rally wheel and me in it. ( I take out the spare at the track, but race with a full tank )

    Engine-
    1972 360 block .040 over
    Stock Edelbrock 60779 63cc closed chamber heads
    Comp XE285HL cam (241/247 .545/.545)
    Comp Pro Magnum roller rockers
    Comp pushrods
    Crane Hi Intensity lifters ( variable lift Rhoads type )
    Felpro 1008 head gaskets
    ARP head bolts
    Wiseco Protru 20 cc dish forged pistons .007 below deck ( 10.1:1 scr )
    Hastings plasma-moly rings
    Scat H-beam rods
    MP/Scat 4" cast crank
    ARP main studs
    Kevko M302 oil pan, no windage tray
    Hedman 78050 headers
    Edelbrock RPM Airgap
    Proform 750cfm manual secondary pn 67213

    TCI Streetfighter 727
    Turbo Action "Tight 10" converter 17805ST

    Suspension -
    Stock K frame with factory sway bar and poly link bushings
    Monroe Matic shocks front and rear
    8-3/4 741 case with factory pinion snubber
    3.23 gears with Powr Lok clutch type LSD
    Espo 6 leaf +1" leaf springs in stock location
    Crager SS wheels 14x7 front, 15x8 rear
    Cooper Cobra 225/70/14 and 275/60/15 (28" tall)

    20170609_202244.jpg

    20170708_020628-1.jpg

    20170610_000624-1.jpg
     
    Last edited: Aug 5, 2017
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    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      Very good! Must have been nice!
      Once you change some gears, possible converter change with decent gripping tires and race without so much fuel, you'll be knocking on 11's I think!
       
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      • AJ/FormS

        AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s

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        Mine is about like this (3.58 stroke); no headwork, no intake work,750DP.
        She goes 93 in the 1/8th at 3457#. It hasn't gone the Qtr. Wallace calculator puts me at 115@12.5 with my street suspension with a theoretical 11 in her somewhere.
        She's very docile, never overheats,and does pretty good on gas with an overdrive.She was my DD for many years.
         
      • KnuckleDuster

        KnuckleDuster Well-Known Member

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        Might sound crazy, but I am going to try for 11's WITHOUT changing the gears. I just want to see iff I can do it.
        This car lives on the highway, the 3.23's are staying.
         
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        • 1969GTS340

          1969GTS340 FABO Gold Member FABO Gold Member

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          Wondering if I'll hit the 12's this year? Any thoughts / suggestions on my build?

          3200 lb ~ Demon
          340 +.060 KB243 ~10-1
          Lunati VooDoo hyd. .547/.568 234/242 @50 110/106 respectfully
          Hughes EQ Magnum closed chamber heads, SS 2.02/1.66 w 1.6 rockers
          Holley 750 DPDF / Airgap
          Dougs headers
          727 Manual Reverse w/ Turbo Action 8" converter
          742 Carrier w/ 4:88
          9x29 slicks 15" wheels.
           
        • rumblefish360

          rumblefish360 So close, yet so far away FABO Gold Member

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          Holy chit! I did t realize all of this was in the

          POST YOUR 12 second combo” thread.

          Your supposed to post the combo that made it into the 12’s, not ask advice here. That’s this threads design and purpose!

          Dang!
           
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          • crackedback

            crackedback FABO Gold Member FABO Gold Member

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            You better go 11's.
             
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            • 1969GTS340

              1969GTS340 FABO Gold Member FABO Gold Member

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              Sorry Rumblefish360. I just got caught up reading all the combos and I started wondering (and typing) if I'll make it into the 12's club level.

              Would you be so kind to point out the proper thread for this inquiry?
               
            • doogievlg

              doogievlg Well-Known Member

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              Post in the racers forum or small block forum and just say “what will it run”. Or make a trip to the track when they open :)
               
            • 1969GTS340

              1969GTS340 FABO Gold Member FABO Gold Member

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              Thank you. I'll repost. I'm still in the assembly stage and being in the North East my local track doesn't open until May. I was just more curious of the opinion from those with simular builds with proven results. Regardless ... I'll post where appropriate and see what surfaces.
               
            • A/MP

              A/MP Well-Known Member

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              That's an easy 11.50 combo if it hooks, carb does not lean out and the hyd. lifters give you the RPM needed.
               
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              • Charrlie_S

                Charrlie_S Well-Known Member

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                66 Valiant Signet
                Real small, small block. 225 cid slant six. Stock short block, Mopar Performance cam .528 lift. Head milled .125 for 10-1 CR. Big valves, home pocket porting. Offie intake, Holley 390VS carb. 150 hp nitrous plate. Clifford headers. FTI 9.5 converter, 904 trans, with manual VB, 4.56 SG 8 3/4 rear. 7x26x15 slicks. Totally stock suspension.
                60ft..............1.669
                1/8................7.766 at 86.64mph
                1/4................12.409 at 103.02
                 
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                • Toluene56

                  Toluene56 Well-Known Member

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                  73 dodge dart swinger
                  no clue what it weighs
                  408 blueprint engines short block
                  Pro-comp (speedmaster) aluminum cylinder heads
                  Crosswinds air gap knock off - port matched to heads
                  Lunati 60413 Hyd Roller cam
                  RoadRunner Converters 3800 stall converter (more like 4000+)
                  Hughes Transmissions 904 w/ manual vb
                  8 3/4, spool, 3.55 gears, 255/60/15 MT SS drag radials

                  Track at 4000ft elevation - 6800ft DA during this run
                  60ft - 1.727
                  1/8 - 7.87
                  1/4 - 12.44 @ 106.77

                  Altitude corrected w/ DA (I'll see how accurate it is when I make the 3hr drive to Sacramento.)
                  11.38@116
                  DA Calculator - Density Altitude Calculator - DragTimes.com

                  I just realized the original post wanted stock stroke stuff.. My bad.
                  31749513_10156238337489259_4665630412528156672_o.jpg
                   
                  Last edited: Jun 11, 2018
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                  • rumblefish360

                    rumblefish360 So close, yet so far away FABO Gold Member

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                    All well!

                    LMAO
                     
                  • ValiantRacing

                    ValiantRacing Well-Known Member

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                    I think you will be in the high 11s in Sacramento, there is a 2 day race this weekend.
                     
                    Last edited: Jun 12, 2018
                  • Toluene56

                    Toluene56 Well-Known Member

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                    I agree I think it'll run 11.70 to 11.80 withwith the 3.55 gears and 11.5 to 11.60 with the 4.10 or 4.30 gears.
                     
                  • 66durgederp

                    66durgederp "pull hard, itll come easy"

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                    66 dart, 4 door. 3450# with a full tank and me (180lbs) in it. MRL 408 full roller, 11:1 static compression, eddie ported heads and matching air-gap intake, proform 750 DP, full MSD ignition. Cope racing 904-4, reverse pattern full manual. 8.75 with 3.55's, auburn limited slip (stock for now) subframe connectors - home brewed, magnum force racing j-bars and shock tower braces, 13 gal fuel cell, 3/8 fuel line with an aeromotive ss pump + regulator, dead-head unit. RMS upper control arms, m-body spindles, stock lower control arms with home brewed stiffening plates, el-cheapo adjustable shocks (set at 60/40 rear and 50/50 front) CAL-TRACS, stock 73-87 (A,F,M,J) brakes, aluminum radiator, full interior, kirkey aluminum seats, and stock cop car steelies (15x7's) Ripped off a 12.41 @ 112, 60' was 1.94. this was on cooper CS5 street tires, 225/60-15's.
                     
                  • rumblefish360

                    rumblefish360 So close, yet so far away FABO Gold Member

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                    Would you have cam specs to that?
                     
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                    • 68Dart500

                      68Dart500 Well-Known Member

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                      Well I hope to post in the 11 second one within the next month but for now I'm here.

                      First time racing a RWD vehicle on the track (my other experience was AWD turbo Stealth's)
                      Run 1: Tires at 20 psi. Launched at 3000 rpm and blew the tires off for a 2.3 60 foot time and a 13.1 @ 106 mph
                      Run 2: Tires at 18 psi. Launched at 2500 rpm and blew tires off for a 2.31 60 foot time and a 13.15 @ 109 mph
                      Run 3: Tires at 18 psi. Launched at 2000 rpm and blew the tires off for another 2.25 60' time and a 13.1 @ 110 mph
                      Run 4: I'm sick of blowing the tires off so I drop the tire pressure to 16. Get a full tank of gas, and add 300 pounds of stuff into the trunk. I do twice as long of a burnout. Then let the clutch out at idle and punch it. Car dead hooks, kills the motor and a I get a ~5 second 60'...
                      Run 5: Another long burnout like Run 4. I Launch at 3k rpm. It hooks and bogs to 2800 ish rpm. Got a 1.9 60' at 12.88 @ 106 mph
                      Unfortunately that was the last run I got as I was eliminated.

                      The combo:
                      408 stroker
                      Forged Scat bottom end
                      Stock OOTB Edelbrock heads
                      10.1:1 comp
                      Howards hydraulic flat tappet 244/248 @.050 w/.565/578 lift. 108 LSA
                      Comp pro roller rockers 1.5 ratio
                      Hedman 1 5/8 headers into 3 inch exhaust with hooker aero chamber mufflers dumping at axle
                      Air Gap Intake
                      750 Quick Fuel SS
                      MSD 6AL2
                      4 Speed A833 with Centerforce clutch. Stock A body shifter
                      Quicktime bellhousing
                      Hydraulic American Powertrain clutch kit
                      8 3/4 w/3.55 gears and Auburn LSD
                      Mini tubbed
                      Springs moved in 3.5 inches
                      28x12.5-15 MT Bias Ply Sportsman Pro tires (terrible btw) Ran @ 20 then 18, then 16 psi
                      Steel 15x10 rear rims and steel 15x4 fronts
                      Subframe connectors
                      Full factory interior
                      All steel body plus Superstock hood scoop
                      Full tank of gas
                      +300 pounds of weight in the trunk in an attempt to get some traction

                      I didn't get to weight it but I'd guess with all the stuff plus the fuel, ballast weight in the back, and me (225 pounds) it's pretty darn heavy.

                      I know I was sleeping at the light
                      20180811_172029.jpg
                       
                    • moparraceman

                      moparraceman Well-Known Member

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                      stick shift is a thing of the pass my dart had a lot less done to it then your car and it was not a stroker ,went 11.50 you spent alot of money in the wrong places
                       
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                      • 68Dart500

                        68Dart500 Well-Known Member

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                        Pretty sure I spent money exactly where I wanted to for my street car. It'll be on the track maybe 3 times this summer just for fun and 99.9% on the street where I'll be having fun slamming through the gears. Secondly I'm still learning how to launch it and what rpm to shift at so it'll go faster if I do go a few more times. The trap speed alone shows that it's got the power to run faster.

                        Btw what car do you currently own or are you just a bench racer now who likes to shit on other people's first time drag racing posts?
                         
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