Post your 12 second small block combos

Mopar Racers Forum

  1. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

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    They also have banjo rears. Nice and light!
     
  2. MattP

    MattP Well-Known Member

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    1st visit to the track with the Dart today.

    Setup was sold to me as a 360 with flat top pistons, 509 purple cam, and Weiand aluminum intake backed up by a Streetfighter 727. It felt strong when I bought it but I wasn't expecting the 12.98 @ 104 it ran today. Cut a 1.9 60' that I couldn't improve with 2 other tries. Time to install the plate and work on that 60'.
     
  3. DERICKS

    DERICKS Well-Known Member

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    1973 Duster340 3200lbs with me in it
    1969 340 with stock rods and crank and TRW 10.5 comp pistons .040 over
    308 production heads witha 2.02 intake valve in them, non ported but have 1.5 roller rockers
    Edelbrock Torker II intake with 750hp holley 2 inch spacer
    1 5/8 headers with 3 in exhaust and msd dist and ignition
    904 trans with Dynamic 9 1/2 convert 2800 stall
    4.56 gears with 28 in tall M/T ET Streets
    Fiberglass hood and front bumper, Willwood front disc brakes, front race buckets, no heater no wipers, rifle drilled axles and spool. CE front shocks amd MP long travel rears with 002/003 springs The car has gone as quick as 11.99 at 112mph but usually stays in the 12.00-12.20 range at 110-111mph.
    [ame="http://www.youtube.com/watch?v=3bd3fWPrOsg"]Duster 340 vs Camaro - YouTube[/ame]
     
  4. aaronk785

    aaronk785 Well-Known Member

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    68 Dart GT
    340 stock crank and rods 10.5 TRWs (really 9.4)
    hughes 237/242 @ 0.50 .534 .543 solid
    2.02 915s cleaned up, gasket match.
    tci street fighter (junk) stalls the same as stock converter about 2200.
    3.55 8.75
    ran 12.93 at 106 1.94 60 ft.
    next up a real converter and 3.91s
    I run 235 60 15 drag radials.
     
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    • jimbo17

      jimbo17 Active Member

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      I ran my Aussie 1974 valiant charger last wed night. 12.1 @113.57 1.85 60 ft
      410 stroker 11.5 comp edelbrock heads, hughs roller cam 232@50 thou 800 edelbrock carb, air gap manifold pacemaker try why headers with 2.5 inch exhaust, 5 speed tko 600 box, 3.91 ratio 7 3/4 borg warner diff. 255 mickey Thompson drag radials. Every time I dropped the clutch at 3 grand or more it would spin all the way through first with 2.10 sixty footers and 12.6 I decided to drop the clutch at about 1500 revs which resulted in the 1.85 sixty foot and 12.1. I had the tyres at 10 pounds should they be higher? Maybe I should buy some caltracs so I can get the sixty footers down I will run in the elevens without any more horsepower?
       
    • rtee007

      rtee007 Deplorable Texan

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      69 Swinger, 340, 26 year old build, still good for 12.60 @ 108mph on cheaters

      ENGINE COMPARTMENT:
      --Rebuilt engine bored 0.030 over with 10.5:1 compression pistons.
      --Edelbrock open element air cleaner
      --Edelbrock 800 Thunder series carb
      --1 inch carb spacer
      --Edelbrock air gap intake(lightly ported and cleaned up by Hughes performance)
      --Edelbrock chrome valve covers with chrome breathers
      --Edelbrock aluminum heads for the high compression 340 that were stage 2 ported by Hensley Performance. (Compression is approx average 180 - 185psi per cylinder)
      --Stock valve train that has been shimmed for the correct valve lash.
      --Mopar Electronic ignition
      --8mm spark plug wires
      --Summit Racing ignition box with rev limiter
      --New alternator
      --Direct Connection Purple Shaft 280 degrees duration(238 degrees at 0.050) with 474 lift advanced to 106 center-line.
      --Carter Performance 6psi mechanical fuel pump.
      --Mopar clutch fan
      --New Premium 3 core radiator with fan shroud.
      --Extra large transmission cooler in front of the radiator.
      -- High Flow dual exhaust with Magnaflo Stainless Steel Mufflers
      --3 inch X-pipe
      --3 inch mandrel bent exhaust over axle to bumper
      --high flow chrome exhaust tips.

      TRANSMISSION/DRIVETRAIN:
      --custom made and balanced drive shaft
      --New TCI 10 inch 3200 Street Fighter stall convertor
      --Mopar Deep Chrome Transmission pan.
      --Competition Engineering Racing shocks
      --Mopar Super Stock Leaf Springs.
      --Mopar Frame connectors.
      --Mopar Pinion Snuber
      --Shimmed axle/pinion
      --3:91 Sure Grip 8.75 rear end.
       
    • racyroy1

      racyroy1 Well-Known Member

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      OK, here’s my combo.
      Short, sweet and to the point.

      Got it down to a 12.66, with a couple of more tenths that could be removed with some more tweaking

      1971 plymouth scamp, gutted.
      340 block bored .20 over
      Stock rotating assembly balanced
      10 to 1 KB cast pistons
      Iron J heads 2.02 valve, 150k miles on them with gasket match and mild porting, (done myself)
      Single grind comp cam 484 lift with springs
      Edelbrock airgap manifold
      650 quick fuel carb
      Crappy summit headers
      904 trans with stage three kit, (stock)
      Cal trac mono leafs with traction bars
      3.91 geared 8 ¾

      I had a 750 holley and ran 13.10-20. Got rid of it and put the 650 on and shaved 1/2 second off.
       
    • rnaz

      rnaz nitrous fed 390

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      Here's what I'm running right now in my '70 Dart:

      390 CID stroked 318 Magnum
      11:1 forged pistons
      Forged H-beam rods
      Forged Crank
      Magnum R/T heads 1.92/1.625
      236/242 @ .050, .588/.588 114LSA
      RPM Air Gap intake
      Quick Fuel 750 Carb
      FlowTech ceramic headers 1-3/4" tube into 3" collector
      904 trans with turbo action kit
      8-3/4" rear end with 3.23 gears
      SS leaf springs
      QA1 rear shocks


      That combo was good for 12.80's @ 105 right off the trailer. I expect to get down to 12.40-12.50 once I finish dialing it in now.

      Sorry...didn't catch the part about stock stroke.
       
    • wildbill

      wildbill Well-Known Member

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      My 1975 Duster - best time 12.35 @ 111.85 at Firebird near Boise, ID (2700 foot elevation, about 95 degrees that day)

      Gutted but still all steel. Home fabricated angle iron bumper brackets with only outer skins

      10 point mild steel cage and subframe connectors. One racing seat only

      0.030 over 360

      KB 107 flat tops - approx 10.25:1 compression

      Stock crankshaft and rods (ARP bolts) - balanced (external)

      Comp XE282 solid cam. Hughes 1.6 rockers. Smith brothers custom pushrods.

      Stock oiling system

      IMM Indy LAX heads with usual setup

      Edelbrock air gap

      Summit 750 mechanical secondary carb

      Cheapo no name 1 5/8 headers with 3 inch duals and glasspacks dumped before the rear axle

      Full manual 727 with custom converter (approx 3500 stall). Footbrake

      8 3/4 B body rear with spool and 4.56 gears.

      Hoosier 275/60/15 drag radials

      Pulls hard to 6500 RPM
       
    • sledger46

      sledger46 Well-Known Member

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      Stock, 1978 360 shortblock with the piston .088 down the hole at TDC (8.7:1 compression)
      EQ Magnum heads with 2.02 intake and 1.625 exhaust (uported)
      Mild roller cam with 224/230 degrees at .050" on 110 LSA
      MOPAR M1 dual plane intake with 1/2 plastic spacer
      750 Holley Vac sec with white spring (3310 with stock jets still)
      1 5/8" Summit Racing long tube headers with Summit Racing 2 1/2" dual exhaust to the back bumper.
      Timing is set for 21 deg initial with 42 total

      904 Trans with mild shift kit
      3200 stall 9.5" converter (Edge Racing)
      742 case 8 3/4 with 3.91 gears
      27" tall Rikin Raptors on the back 255R-50-17s


      12.913 @ 105.61 1/4
      8.253 @ 84.33 1/8
      1.887 60 ft
       
    • fishy68

      fishy68 Tyr Fryr's Inc. FABO Gold Member

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      Never mind. Missed the part about stock stroke only. Sorry
       
    • rmchrgr

      rmchrgr Skate And Destroy

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      Ha, I started this thread a while back, finally get to add to it.

      Now, I believe my combo should have gone faster than what it did - best was 12.20 @ 110.8 letting off before the stripe on a breakout pass. If I had run it out the back door, it probably would have gone a few ticks faster, maybe 12.1-12.0. Something was holding it back, this combo should have been easily into the 11s. The previous owner said it went a best of 11.97 but it had a 4.30 gear in it and couple different things. He said it usually went 12.0-12.2 which is where I was.

      I have not had the heads off so I don't really know any particulars without taking it apart. It is coming out for a stroker though so I am basically speaking in the future past tense, if that makes sense.

      Factory 340 block.

      3.31" stroke, forged crank, stock rods. Pioneer balancer.

      Approximately 10.5:1 C.R. - 180 psi cranking compression pistons unknown.

      810 casting W2 'race' heads (no rocker pedestals) - unported with 2.08" intake valves per the previous owner. These heads usually have 68-72 cc open chambers.

      Harland Sharp W2 rockers.

      Mopar .557 solid cam, lash set to .026"/.028" warm.

      Mopar distributor, no vacuum advance; 19-20 degrees initial, 35-36 degrees total, all in by 1,800 - 2,000 rpm.

      Firecore HEI-style cap and wires.

      Autolite plugs, can't recall the number, 8324 maybe?

      Edelbrock Victor W2 intake, no porting.

      Proform 750 double pumper. 75-85 jets, 4.5 power valve in primary only. Had various air bleeds in it, don't remember which were in it. Blue pump cams, 30cc diaphragms.

      Quick fuel air bell with K&N filter top.

      Carter 6270 mechanical fuel pump, regulated to 6.5 psi.

      1/2" RobbMc tank pickup, 3/8" fuel lines to the pump/carb.

      TTi step 1 5/8" step headers intto 3" collectors. Full 3" exhaust with balance tube, Flowmaster 40 series mufflers. It's kinda loud.

      904/999 trans w. T/A FMVB, no braking in first. Low gear set, B&M Pro Ratchet shifter.

      Hughes 10" street/strip converter, 3,800 stall.

      4.10 gears, Mopar aluminum carrier, Auburn sure grip, Moser axles.

      275/60/15 M/T drag radials set to 18 psi

      Caltracs with Calvert shocks front and rear.

      Offset springs.

      SSBC K/H type disc brakes in front, 10 x 2" rear drums, aluminum master cylinder with Line Lock.

      Battery in trunk.

      3,060 lbs with a full tank of gas, 3,245 with me in it. No heater, radio etc. Lightweight bucket seats, full interior.

      Car idles at 1,000-1,100, dropped to about 700 (?) in gear.

      10" inches of vacuum at idle.

      Shifted at 7,000 rpm, sometimes lower, sometimes higher.

      Car had very little torque off the line. It needed the 4.30 gears,. the 4.10 just didn't get it done.

      Again, best pass for me was 12.20 @ 110.8 with a slow 1.75 60 ft time.
       
    • Hot Metal

      Hot Metal '69 440 Cuda

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      Well this was in an all steel '71 Cuda in 1987

      Around 3550lbs at the line?
      back seats taken out and front race seats/cage
      used to drive it on the road, ran nice.

      Stock '71 340 motor, stock 2.02 heads, no porting
      Fel-pro h/gasket
      DC .590 solid cam
      Holley Strip Dominator+2" spacer
      850DP
      1.3/4" Hedman Chassis Headers
      MSD6A
      Manual 727, 4200 verter
      4.30 gears, 10x28 slicks
      Stock Springs+Snubber
      12.39@108.5 n/a

      Hit this combo with a 250 shot and went 11.01@123
       

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    • 360tripleblack7

      360tripleblack7 Gold Member

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      '77 318 block + 360 Crank
      Scat I-Beam Rods
      KB Hyper flat tops 10.3:1
      Mopar Purple Cam .557/.557 mec. cam
      Mopar J Heads Ported 2.02 / 1.60
      Proform Roller Rockers 1.5
      Professional Products Air gap intake OOTB
      Mighty Demon 750
      TTI 1 5/8 Step 1 3/4 Headers
      904 Auto trans with TCI Rebuild Kit

      This combo runs in a 77' Charger (Made in Brazil) with 3350lbs street car naturally aspirated...

      Best time is 1.79 60ft - 7.74 1/8 - 12.11@111.45 1/4
       

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    • morepowertoya

      morepowertoya morepowertoya

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      1971 plymouth duster
      late 70s 360 truck shortblock reringed stock pistons,.080 below deck
      j heads 2.02/1.60 non ported, gasket matched,bowls cleaned up,milled
      mp 284/484 cam
      273 rockers
      chinese air-gap
      750 holley hp dp
      cheapo dynomax 1 5/8 headers 2 1/2 pipes moroso mufflers exit at side before rear tires

      904 trans low 2.74 first gear/tf2 kit
      turbo action 3500 stall

      3.55 geared 8 1/4
      stock springs with extra clamps
      drag radials

      open exhaust best 12.59/12.60s all day
      exhaust on 12.80s
      87 octane all day.



      [ame]http://youtu.be/mpr5Sf5ikCw[/ame]
       
    • morepowertoya

      morepowertoya morepowertoya

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      my son waiting in line to run at cordova drag strip in cordova illinois.
       

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    • rtee007

      rtee007 Deplorable Texan

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      Nick I have a 380hp Mopar crate in a 72 Dart, 4 speed 3.23 gear. Like to modify it a little any advice? I know the gear is weak, gonna fix that soon.

       
    • rick4106

      rick4106 Well-Known Member

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      67 Dart 3510 lbs with driver. .030 over 360,stoke stroke,stock rod,9.5 hypertech pistons, 2.02 j head, 467/494 crane .222/.234 @.050 114lsa., strip dominator,750dp, 2.75 low gear 904, 3000 ptc, 4.10 on 275/60/15 12.56@104.7 with 1.71 60 foot thru the mufflers
       
    • IRISH RT

      IRISH RT Well-Known Member

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      I just got all My Problems sorted and ran a 13 flat here in New zealand at the Weekend Now Im hungry for 12 which would not be too hard , I run a 1975 Chrysler Valiant pickup or ute as we call them here ,

      360 fully balanced stock crank , 30 over forged pistons 10.5 approx compression eddy heads out of the box , hughes rocker gear rpm manifold ede 800 carb, Electric fans, pumps etc , 3500 stall edge convertor, 3.9 gears baby cam 484 lift pump gas 98 octane with octane booster, 26x 9.5 hoosiers just want to make little changes , Currently a very streetable combo and I want to keep it that way , My 60ft definetly need attention currently 1.9 or 2.0 Might be fuel delivery of the lne squirter size etc ,

      Any ideas to get it in the 12 appreciated without internal engine changes etc thanx
       
    • mderoy340

      mderoy340 Well-Known Member

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      put a 650 holley dp or similiar for drag racing.
       
    • IRISH RT

      IRISH RT Well-Known Member

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      600 is too small my 800 edelbrock is on the lean side. dont want to change anything out at the moment feel 12s are achieveable with minor adjustments,
       
    • Valiant65blower

      Valiant65blower Active Member

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      318cid
      kb399 pistons 030 oversize
      Scat-I beam
      Tunnel-ram
      2x465cfm Holley
      360 head 1.88 and 1.6 valves. fully ported
      Compcams xs282s

      Trans 904
      Converter 4000stall
      reverse manualvalvebody

      rear 4.11

      Tires 235/60-15 m/h street radial

      Best so far 12.364/ 105mph
      60feet 1.977

      Car weight 3500
       
    • Valiant65blower

      Valiant65blower Active Member

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      Update new best 11,95 / 115mph
       
    • crackedback

      crackedback FABO Gold Member FABO Gold Member

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      What did you change to pick up 4 tenths?
       
    • Valiant65blower

      Valiant65blower Active Member

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      Different and better track...
       
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