383 cam advice?

Big Block A body Tech

  1. HP2

    HP2 Well-Known Member

    Messages:
    84
    Likes Received:
    15
    Joined:
    Nov 19, 2014
    Location:
    Various places
    Local Time:
    11:14 AM
    Yup, I will need to mill them but I have the tools to do it :)
    There is always decisions to made along the way. I decide now that I can live with that, the car will not get tremendous amounts of mileage!
     
  2. HP2

    HP2 Well-Known Member

    Messages:
    84
    Likes Received:
    15
    Joined:
    Nov 19, 2014
    Location:
    Various places
    Local Time:
    11:14 AM
    I will mill the valve stems to fit teflon seals anyway, so there will be room for heavy springs.
     
  3. HP2

    HP2 Well-Known Member

    Messages:
    84
    Likes Received:
    15
    Joined:
    Nov 19, 2014
    Location:
    Various places
    Local Time:
    11:14 AM
    I have actually started considering headers instead of the HP manifolds. I just remembered I have a nice used pair. Think they are 1 3/4"
     
  4. HP2

    HP2 Well-Known Member

    Messages:
    84
    Likes Received:
    15
    Joined:
    Nov 19, 2014
    Location:
    Various places
    Local Time:
    11:14 AM
    Just changed my mind, it will get headers.
     
    Last edited: Aug 2, 2020
    • Like Like x 1
    • HP2

      HP2 Well-Known Member

      Messages:
      84
      Likes Received:
      15
      Joined:
      Nov 19, 2014
      Location:
      Various places
      Local Time:
      11:14 AM
      Since I'm in Sweden there's a time difference, and I was busy last night.
      Been looking at the cam(s) you recommended but they look rather small in both duration and lift?
      The LS on both Elgin and Crane are 112-114 which I think is a little high?
       
    • HP2

      HP2 Well-Known Member

      Messages:
      84
      Likes Received:
      15
      Joined:
      Nov 19, 2014
      Location:
      Various places
      Local Time:
      11:14 AM
      Please explicate :)
       
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

      Messages:
      39,445
      Likes Received:
      10957
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      Local Time:
      5:14 AM
      Both items will produce extra torque and horsepower.
      In addition, the RPM is a better intake even on mild engines with a higher RPM ceiling to grow into. A Performer is a basic aluminum version or OE replacement intake manifold.

      Perfect size.
      Power wise, wise choice.
      The wider center lines do a few things over a narrow one. Sometimes good, sometimes not so good. A lot depends on the characteristics and usage of the cam and the vehicle. A wider centerline will;

      Have a smoother idle.
      Extend the top end HP curve. (Hang on to the power longer.)
      Normally require more static compression to equal a more narrow centerline. It will produce less power down low which isn’t what most people want, but, if your combo is a slight miss match and/or not a hot street ride or race car, this becomes desirable with low numerical gears, large tires, low compression engine and a mismatched stall converter.

      I did this with a 318 @ 7.8-1 compression ratio & 3.21 gears. It still burned rubber off the line very well. Once the engine comes into its power band, it worked very well even though it still had stock small valve heads. The volumetric efficiency rpm area of it all starts to work, you regain ground.

      An old member here once used a Crane Cam @ 216/228-.454/.480-112, listed above, in a 360 in his bracket Duster. He ran the car down to mid 12’s.
      The car also had a good diet plan, not an extreme one, and lot of gear.
       
      • Like Like x 1
      • Agree Agree x 1
      • HP2

        HP2 Well-Known Member

        Messages:
        84
        Likes Received:
        15
        Joined:
        Nov 19, 2014
        Location:
        Various places
        Local Time:
        11:14 AM
        Good and useful information, thanks!

        Don't you sacrifice some of the low end power and response and with a RPM intake?
         
      • rumblefish360

        rumblefish360 So close, yet so far away FABO Gold Member

        Messages:
        39,445
        Likes Received:
        10957
        Joined:
        Jun 21, 2005
        Location:
        New York, on a Island
        Local Time:
        5:14 AM
        Not IMO! I have it on a ‘00-5.9 that is otherwise stock except the following. A 600 Edelbrock and 1-3/4 headers into a 2-1/2 true dual exhaust. Chrome box ignition.

        3.55’s on 26-1/2 tires stock 727 trans and stock low stall converter in a ‘79 B body. Works excellent.
         
        • Like Like x 1
        • 273

          273 Well-Known Member

          Messages:
          3,403
          Likes Received:
          1130
          Joined:
          May 14, 2012
          Location:
          Ontario
          Local Time:
          5:14 AM
        • pro451bee

          pro451bee Member

          Messages:
          11
          Likes Received:
          8
          Joined:
          Nov 9, 2011
          Location:
          wa
          Local Time:
          2:14 AM
          That comp muscle magnum cam looks like my choice for a 383 with 3.23 ,that high lift one will idle and drive around awful and have stink exhaust, that was my experience any way .Way easy to over cam a 383.
           
          • Like Like x 1
          • HP2

            HP2 Well-Known Member

            Messages:
            84
            Likes Received:
            15
            Joined:
            Nov 19, 2014
            Location:
            Various places
            Local Time:
            11:14 AM
          • HP2

            HP2 Well-Known Member

            Messages:
            84
            Likes Received:
            15
            Joined:
            Nov 19, 2014
            Location:
            Various places
            Local Time:
            11:14 AM
            It's very easy to over cam any engine. And for this engine I really want to find the cam that really makes it shine.
            not too big and not too small and that's why I ask for advice from you experienced people.
             
          • HP2

            HP2 Well-Known Member

            Messages:
            84
            Likes Received:
            15
            Joined:
            Nov 19, 2014
            Location:
            Various places
            Local Time:
            11:14 AM
            I went from RPM to the lower Performer, shaved off the J heads and put on a smaller 600 carb on a 360 that came in a Cuda I bought and it really woke her up. It had an unknown cam but it was kinda hot for a street car. I shaved off a little too much so it got 180-195 psi cyl pressure. I had a hard time tuning carb and timing to make it run good without pinging on pump gas.
            Afterwards it always impossible to know what made what but that engine got a very broad powerband.
             
          • RustyRatRod

            RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

            Messages:
            65,926
            Likes Received:
            39267
            Joined:
            Jun 7, 2010
            Location:
            Georgia
            Local Time:
            5:14 AM
            Depends on what you're doing. I haven't seen where you've made that abundantly clear yet.
             
          • 273

            273 Well-Known Member

            Messages:
            3,403
            Likes Received:
            1130
            Joined:
            May 14, 2012
            Location:
            Ontario
            Local Time:
            5:14 AM
            I'd go with something like the Lunati voodoo 702.
             
            • Like Like x 1
            • rumblefish360

              rumblefish360 So close, yet so far away FABO Gold Member

              Messages:
              39,445
              Likes Received:
              10957
              Joined:
              Jun 21, 2005
              Location:
              New York, on a Island
              Local Time:
              5:14 AM
              Link? Specs?
               
            • 273

              273 Well-Known Member

              Messages:
              3,403
              Likes Received:
              1130
              Joined:
              May 14, 2012
              Location:
              Ontario
              Local Time:
              5:14 AM
              Voodoo Hydraulic Flat Tappet & Lifter Kit - Chrysler 361-440 Three Bolt 262/268

              Hydraulic Flat Tappet Cam. Mid-level performance street cam with excellent drivability. Works well with stock type exhaust manifolds and dual plane intake with mild 4 bbl carb. This is an Awesome 4x4 and performance marine cam where dry exhaust is used. Improved valve springs and roller rockers recommended.; Advertised Duration (Int/Exh): 262/268; Duration @ .050 (Int/Exh): 220/226; Gross Valve Lift (Int/Exh): .475/.494; LSA/ICL: 112/108; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 1400-5800; Includes: Cam & Lifters
               
              • Thanks! Thanks! x 1
              • HP2

                HP2 Well-Known Member

                Messages:
                84
                Likes Received:
                15
                Joined:
                Nov 19, 2014
                Location:
                Various places
                Local Time:
                11:14 AM
                It would be sooo interesting to hear your opinions after your test run!
                With that narrow LSA it should make a lot of power from the bottom. I'm sure you will get tears in your eyes if you're behind LOL
                 
              • HP2

                HP2 Well-Known Member

                Messages:
                84
                Likes Received:
                15
                Joined:
                Nov 19, 2014
                Location:
                Various places
                Local Time:
                11:14 AM
                Yup, that's another cam in that range.
                Question is if it's grind with .904 lifters in mind or just another Chevy profile?
                 
              • 66fs

                66fs FABO Gold Member FABO Gold Member

                Messages:
                5,051
                Likes Received:
                1683
                Joined:
                Sep 9, 2009
                Location:
                Greenwood, South Carolina
                Local Time:
                5:14 AM
                That will be a while since the car is 1,500 miles from me for paint and body. I'll just have to wait. Call a good cam grinder and get their recommendations. Better have all your cars specs and what you want the car to do, handy though.
                 
                Last edited: Aug 5, 2020
                • Like Like x 1
                • HP2

                  HP2 Well-Known Member

                  Messages:
                  84
                  Likes Received:
                  15
                  Joined:
                  Nov 19, 2014
                  Location:
                  Various places
                  Local Time:
                  11:14 AM
                  Seems like you still are a little closer than me! LOL
                  I will do as you say, ask some good cam grinder and follow the recommendations.
                  I know pretty every detail except for the exact weight, but that we can estimate
                   
                  • Agree Agree x 1
                  • 273

                    273 Well-Known Member

                    Messages:
                    3,403
                    Likes Received:
                    1130
                    Joined:
                    May 14, 2012
                    Location:
                    Ontario
                    Local Time:
                    5:14 AM
                    Last edited: Aug 5, 2020
                    • Like Like x 1
                    • HP2

                      HP2 Well-Known Member

                      Messages:
                      84
                      Likes Received:
                      15
                      Joined:
                      Nov 19, 2014
                      Location:
                      Various places
                      Local Time:
                      11:14 AM
                    • rumblefish360

                      rumblefish360 So close, yet so far away FABO Gold Member

                      Messages:
                      39,445
                      Likes Received:
                      10957
                      Joined:
                      Jun 21, 2005
                      Location:
                      New York, on a Island
                      Local Time:
                      5:14 AM
                      Normally, like Richard was saying and eluding to, the tighter 108 would peak higher and earlier. I also was surprised. Also as Richard was saying, there are generalizations due to what is normally seen and exceptions which we have just seen. In this case the top end of the 108. But basically this is what happens.

                      @273, good video post. I did t know Rich did that test.
                      (Or forgot....)
                       
                      • Like Like x 1
                      1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                        By continuing to use this site, you are consenting to our use of cookies.