Post 11 second small block combos

Mopar Racers Forum

  1. Demon1320

    Demon1320 Well-Known Member

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    Between the boat, the quads and now this car I barely have time to maintain nevermind build/restore, therefore I bought this car as you see it. The only thing Ive done is set the valves,installed a 3" header dump,hooked up the NOS and worked on the back end set up. I certainly applaud everybody for doing what you do as far as restoration/building. Frankly, I just don't have the time.

    The Demon of course is an original 72 340, with a 69 block,balanced/built crank,6 pack rods, 020" over KB pistions,Eddy alluminum heads, roller cam/valve train/solid lifters,RPM intake,750 and a 850 performer (havent decided which one to use),NOS 150hp shot,electric fan,fuel cell,shaved water pump impellor,battery in trunk...........And......built 727,cheetah manual valve body, set up for a trans brake,line-lock,8 3/4 with hardened gears (4:86),strange axles,tubbed (obviously) running 31X16.5 ET Streets. I'm missing a bunch of stuff here but this is it in a nutshell, The car will run 11.8's all day when tuned/set up on engine and on NOS im not sure, as I too dont have cage nor do I want to install one. My guess on spray the car Should run mid-to high tens" given that my buddies 68 Dart dropped 1-1.5 secs with the same set-up.

    Its funny, Ive been going through the bills from the guy that built it and I stopped at ~$20k for the drive train alone with a bunch of misc. bills left to count. Likely I could NOT afford to build it either on top of the time issue......lol

    Darin
     
  2. airwoofer

    airwoofer Drivetrain limit explorer

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    Got the 416 put in my FB fish and ran it down the 1/8 mile yesterday. What a HUGE improvement from the 340! Was 8.37 / 84 MPH (2 1/2" dual mufflers) at about 55 degrees, now 7.26 / 96 MPH at 72 degrees. 60' was around 2.0 (plus/minus .06) now 1.60 or so. Thgis is with an inadequate burnout as the line lock is busted. Right now open TTI 3" collector headers. I think there is more there cause the shift to 3rd is acting like a missed shift for a while so maybe I need to loosen up the kickdown. Fuel line size needs increasing to 3/8 ID (AN6).

    3050 # with driver
    3.91 SG, 275/60-15 drag radials
    10-1 CR running pump 93 octane
    ported eddys, victor 340 1" blended spacer, 830 Holley
    Comp 292H purple 508 hydraulic flat tappet cam, 1.5 rockers
    low stall converter (maybe 2200 flash).

    My goal is to have a stock console interior and after paint have the street car run 7.35 to 7.50 so I don't have to install bars.
     
  3. stevedemon340

    stevedemon340 Senior Member

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    I run a '70 340 .030 ross 10.5 flat tops. "X" heads with musle motor stage 2 port work. Ultradyne .587/255 @ .050 solid flat tappet cam, RPM air gap and a Biggs 750 Holley. MSD dist.,6a box and Blaster 2 coil. Stock crank and eagle "H" beam rods. A 4300 Coan 8 inch converter in a 727 with a cheetah reverse manual v b. 8 3/4 rear with 4.56 detroit locker. In my stock '71 Demon that weighed 3215 w/o me it ran 7.43 at sikeston. It has run a 6.88 in my race car.
     
  4. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

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    Nice, I guess that is 1/8 mile (LOL Kidding) Can you convert it?
     
  5. moparmanestock

    moparmanestock Well-Known Member

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    My Demon runs similar 1/8 and converts as follows, (off actual ET slip) 7.45 in 1/8 at 90 mph, in 1/4 it runs 11.81 at 113MPH.
     
  6. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

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    Thanks, I should have asked if there's a on line calc to use for this conversion.
     
  7. moparmanestock

    moparmanestock Well-Known Member

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    I guess I shouldn't have said conversion, as I just read it off the time slip. There are conversion factors out there, but I don't feel they're all that accurate. If a car has really deep gears and gets killer 1/8 et, car may be in rev limitter far before end of quarter. Likewise some cars like my Road Runner would not come out of hole well at all, so was slow in 1/8, but would really haul at end of quarter.
    I think the conversions/comparisons are neat, but not diffinitive.
     
  8. dr.mopar

    dr.mopar Member

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    Wow, impressive times. We had our 3600lb. B body 408 out this past fall and ran 11.93 at 111.36MPH.
    Engine combo,
    Eagle cast crank.
    Eagle I beams.
    Keith black 8.5 comp.
    J-heads, ported and polished.
    Extreme energy mechanical cam, .501/.511, .236/.242@ .050.
    Crane Gold 1.6 rockers.
    M-1 single plan intake.
    Holley 750 HP/DP.
    MSD 6AL.
    Headman ceramic 1 5/8 headers.
    Moroso electric waterpump drive with electric fans.
    10x28 Goodyear D-5 compound slicks.
    4000 stall converter.
    4.30 gear.
     
  9. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

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    When ya run it, post it, until then, keep it off. Show me the time slip.
     
  10. momoparnut

    momoparnut Well-Known Member

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    nice you all have my attention.
     
  11. moparmanestock

    moparmanestock Well-Known Member

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    Just put Demon on chassis dyno to cure issue with not pulling above 6000 RPM. Found out the rev limit on the MSD Digital 6 box was coming in early. It was set for 6500, but dyno showed engine cutting out at 5900. Adjusted up rev limit, car pulled to 6500! Gained 12 HP at peak and 50 HP at 6000 just turning that dial! No engine tuning was done at all.
    Am going to Firebird for another run Jan 28th.
    Previous best, last week, was 11.72 @ 112. Hope to see around 115 MPH now, maybe 11.60s? Will let you know.
    Chuck.
     
  12. perfacar

    perfacar Well-Known Member

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    hi, 1972 duster 340 low comp, stock intake ,carb, cylinder heads with 1.88 & 1.60 sst valves, stock stroke, .060 overbore, jerico 4 spd, mcleod clutch, 5.57 gears, 9x 30 slicks, calverts.3350 # , 11.37 @ 115.57 .
     
  13. The Shocker

    The Shocker Well-Known Member

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    Dang dude ,that 340 must be turning some serious rpm's with 5.57 gears and a 30 inch tire at 115 plus ,yikes !!!
     
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    • perfacar

      perfacar Well-Known Member

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      hi, 7100/7200 is usually where it runs in traps. it pulls it easily. before had 5.13 and 29.5 tire, turned 6400 rpm. changed to 5.57 and 30 " tires, ran .30 quicker and 1 mph faster. just food for thought.
       
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      Got a cam spec for that combo Perfcar?
       
    • crackedback

      crackedback FABO Gold Member FABO Gold Member

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      I'll bet MONEY it's a Stock Elim car...

      Runs hard.
       
    • 604 Racing

      604 Racing 604 RACING

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      410 stroker
      11.1 compression
      comp 284xe cam
      ported and polished eddy performer heads
      comp magnum full rollers
      KP pistons forged
      forged h beams
      eddy airgap
      richard shultz built 750 carb, flow 832cfm, super boosters, filled baseplate, billlit blocks.8.75, 373
      727 stage 2 shift kit, 3000 stall


      11.80 not tuned full weight, daily

      tuned, with a bigger roller cam, i expect 10.80
       
    • 70aarcuda

      70aarcuda Master Hoader of SBM FABO Gold Member

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      Occupation
      building stocker motors and bkt motors....yuppph.......
       
    • moparmanestock

      moparmanestock Well-Known Member

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      Car did pick up a little. Ran 11.64 @ 113. 1/8 imprved to 7.32 @ 91. I shift at 5800 and go thru lights now at 6300. I footbrake, leaving off 2 step at 2700. May try upping my launch next. My friend with simialr combo says he shifts at 5500, so I may try that next as well to see if it helps. It was 75 degrees out, was hoping it would be cooler!
       
    • stroker402

      stroker402 1968 dart GTS convertible

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      here is my ride .. I restored it myself and worked on just about everything on it mechanically .
      best times low 11.0's on motor . stock mopar magnum crate engine 402 cuin.
      never had a valvecover or intake off . all bone stock.. never touched .. Just 8 years of tweaking !

      Due to lack of description of anything but a brag, I took the time the poster didn't to present you with a link to a thread he started. Thanks for the extra work.

      http://www.forabodiesonly.com/mopar/showthread.php?t=175606

      http://i446.photobucket.com/albums/qq185/stroker402/raggie5-11drivewayGood.jpg

      [​IMG]
       
    • Salty Dog

      Salty Dog Multi MoPar owner

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      Bad link.

      Gear? Converter? suspension mods? Tire?

      Come on man! Throw us a bone here! LOL! That is what this thread is all about.
       
    • 345man2

      345man2 Well-Known Member

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      :Dpretty sure its not like my stock 340 lol but i am wishing, that jericho trans gives alot away lol, either way its fast
       
    • stroker402

      stroker402 1968 dart GTS convertible

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      Sorry guys ! I was posting all the info on another topic here ... was having so much troubel posting pics I gave up on this post. but I can post some of the goodies done to my dart.
      Bought the engine 8 years ago ..... mopar crate magnum stroker 402 cu in. after I restored the dart .
      engine specs : sb 360 stroker 4.0 crank . new block >>>new everything.
      not a reman engine at all. directly from mopar .
      specs 292 -312dur @ 50 , lift 513>>> hyd roller cam.
      keithblack pistons
      9:1 comp. motor . heads > RT 202 .. bone stock never touched.
      m-1 intake never touched.
      tried all holleys carbs from 750 up to 950.. the 850 dp made the hp and torque.
      headman hustler 1 7/8" fenderwells wrapped .3.5" collector.
      exhaust 3" .. the best x-pipe on the market , dynomax muffs and turndowns after muffs.
      trans > built by Rush performance all top notch clutchs and bands . 2.0 lever , shift kit , rv manual vb , 3500 turbo action converter , deep pan.
      3inch driveshaft with huge joints
      frame rails are tied.
      8.75 > 3.91 gears
      rearsuspension >> caltracs -mono leaf -9 way shocks . all stock location on springs .
      front susp. >>>> 6cyl bars . larger 10" front drums & brake shoes
      no sway bar . caltrac front shocks,
      fuel cell . with big pump , 1/2" fueline
      full interior . chromoly 8pt roll bar.
      electric moroso water pump, fuel pump and rad fan. taurus
      linelock.
      custom made sealed air pan to carb .
      6pac hood scoop... glass hood and front bumper.
      car weighs 3200# W/O driver .
      tires are 11.5 hooiser qtps on 7" wide 15" cragers . front center line shinnies 15"
      raggie runs in the 11.0's all day on motor, to this day , after some more tweaking last year. it pulls both front wheels off the ground about 4" and carries them out a short distance.
      I'm very impressed on what this engine can do... It come a long way in 8 years of tweaking everything.
      I am pleased to share all this info with you guys !
      Thanks !
      stroker402
       
    • burr

      burr Active Member

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      1969 Dodge Dart
      F/SA 340
      3350 Lbs.
      60ft - 1.41
      330ft. - 4.35
      660ft. - 6.92
      1320ft. - 11.07

      my mistake
      hoosier 30.0/9.015R CO6
      hoosier 28'' fronts
      M/T wheels
      calvert caltrac sup. front&rear
      6cly bars
      5.13 gears
      moser spool&axles
      904 racing trans /low gear set 2.7
      ati converter 5000+
      340 3.31 stroke 0.60 over
      x head 2.02in. 1.60exh.
      manley rods
      cp pistons 10.5 to 1
      comp valve train
      comp stocker camshaft lift 463-473
      stock oil pan
      factory intake
      factory avs 4611
      quick star 275 fuel pump
      that was a good pass but not fast pass some 340 go into the 10's in f/sa have not got there yet.
       

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    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      Awesome dude! Nice!!!!!
       
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