383/400 stock stroke recipe's!

Mopar Performance Issues

  1. Pana.Mopar

    Pana.Mopar Duster Down Under

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    Here's my unstroked combo..

    383 Bored 30 thou - Flat Tops-Balanced Bottom End - Comp Ratio around 9.5 - Mopar Purple 484/484 Hydraulic Cam
    Unported 516 Heads-2.14/1.80 valves, Comp Springs, Roller Rockers
    Eddy TM6 single plane intake and old (4479) Holley 750 D/P
    MSD Streetfire Box and standard Chrysler Elec Dizzy and MSD 2 Coil
    T/Flite 727, 3,000 stall, 4.10 gears

    Ran 13.7 (@103mph) at Sydney Dragway a couple of weeks ago in extreme heat. Needs some sorting out as should be running quicker.

    Here's pic from burnout comp.. It's been nicknamed THE TAXI!

    [​IMG]
     
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    • meathead66

      meathead66 Mod Top

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      How bout this 400 with 383 steel crank, Bullet 670/650 lift 108 sep 274/278 @.50, icon .033 over piston, eagle rods, victor intake, eddy heads, harlan sharp 1.6's, SRP solids, Smith bros push rods, 850 cfm Holley etc
      406" 610HP @7000 plus
       

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    • moper

      moper FABO Gold Member FABO Gold Member

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      66 - that reminds me of my Newport... I bought a '69 300 to replace it and that's in the weeds until I get to it. But I have some pics like that. My Dad came home one night after being at a cookout accross the street and his first words were "Do you have any idea how fucking annoying that car is??!!!" Dad never swore but had some gin in him... I had been tuning the car (from a dead stop) out in the street...lol.
       
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      • cuda620

        cuda620 Well-Known Member

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        Who built your custom headers?
         
      • famous bob

        famous bob mopar misfit

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        this is what I`d do , but w/ alum. heads. Iron heads at that comp. will more than likely need "good" gas , won`t it ??
         
      • bobscuda67

        bobscuda67 Well-Known Member

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        Another thread up from the past. Ok, I'll bite!
        The year was 1975 and I had a 1969 383 $ speed Roadrunner that I raced. It had a stock stroke .030 over block with stock crank, stock rods and bolts with 12;1 forged pistons. Stock heads and valve sizes, no porting. Used all the stock stamped steel rockers too.
        The cam was a hydraulic flat tappet by Crane, I don't remember the specs on it but it had a pretty radical idle for a street driven car. Topped with a 383 torquer intake with a 750 double pumper.
        It had a dual point distributor, remember those?
        Hooker race headers with no exhaust mufflers.
        The 8 3/4 had 4:56 gears and goodyear 9 inch slicks.
        The best pass it ran was a 12:27 at 115. I thought it was pretty fast for what it was.
         
      • RustyRatRod

        RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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        With that cam, plus the quench, it's run on super.......maybe on 89.
         
      • BrokenTool

        BrokenTool Well-Known Member

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        I believe it was Mad Dog Headers
         
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        • perfacar

          perfacar Well-Known Member

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          about 5 yrs ago, 1969 RR, 383, trw pistons, solid cam, 254/267, .540 lift, 5.13 gears and 28.5 x 10.5 slicks 4500 conv, shifted at 7200 rpm. ran 11.55 @ 116 MPH. and 906 heads.
           
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          • cuda620

            cuda620 Well-Known Member

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            I heard the 383’s liked to rev more than the 440. I would guess a 400 would be the same,,,with good pistons of course.
             
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            • IQ52

              IQ52 Well-Known Member

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              Hmm.......the throttle position has always determined where each of my engines has 'liked' to rev to. It's always been me to decide what my engine liked and I've left my engine's feelings out of it.
               
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