What Is Your Idle Speed (and camshaft specs)?

Discussion in 'Mopar General Discussions' started by dibbons, Oct 19, 2018.

  1. AJ/FormS

    AJ/FormS 367 FormS clone 3.09-1.92-1.40-1.09-.78od 3.55s

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    Not a BB but,I have a 367cuber with a Hughes having about the same specs, and it's about 11" at 700, @930ft elevation. It will idle down to 550 in gear(M/T), with a lot of ignition retard. IDK the vacuum down there,lol.
    A 440 would probably pull a lil more vacuum.
     
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    • MomsDuster

      MomsDuster FABO Gold Member FABO Gold Member

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      I’m getting 8-9” @700rpm. Was getting concerned that I may have a vaccum leak but other than the low vacuum I have no other symptoms. Since the EFI is controlling timing I may bump up the base timing and see what that does.
       
    • DrCharles

      DrCharles Well-Known Member

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      451, 4-speed. Cam is 272@.050, .652 lift. Idles at 1050-1100 rpm @ 7" Hg.
       
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      • dgibby

        dgibby Well-Known Member

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        Hughes 238/242 hydraulic roller with 1.6 rockers

         
        Last edited: Oct 21, 2018
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        • dgibby

          dgibby Well-Known Member

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          Cam card

          CE074863-001A-4B4C-B6B8-586FFB9637A6.jpeg
           
        • dartfreak75

          dartfreak75 Well-Known Member

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          Holy cow that car looks and sounds freaking awesome. That is the prettiest red color iv ever seen. I'm not a fan of red but that thing looks like a hot wheel chrome color. Absolutely amazing.
           
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          • clinteg

            clinteg Well-Known Member

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            Yup I’ve hated that pump since day 1. Debating what to do. Not sure if I want to keep the cell I have or get a different one altogether. I’d really like to free up the trunk space and get a whisper quiet pump while I’m at it.
             
          • clinteg

            clinteg Well-Known Member

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            Thanks! More info about it here 1969 Dodge Dart: Evolutionary Dart - Hot Rod Network
             
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            • dartfreak75

              dartfreak75 Well-Known Member

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              • mopardude318

                mopardude318 Well-Known Member

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                ok here is an update, I found my cam card:

                IMG-3897.jpg

                and here is a video



                 
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                • Toluene56

                  Toluene56 Well-Known Member

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                  About 750-850 with lunati hyd roller 60413
                  .560/.565 243/251@.050
                   
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                  • 1Fast340

                    1Fast340 Well-Known Member

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                    What is the rest of the build?
                    That thing sounds good.
                     
                  • mopowers

                    mopowers Well-Known Member

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                    cubic inch?
                     
                  • Toluene56

                    Toluene56 Well-Known Member

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                    Thanks

                    Blueprint "408" short block (410)
                    Procomp heads, cleaned up
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                    • mopardude318

                      mopardude318 Well-Known Member

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                      It's interesting to see the lobe separation and installed centerlines between various camshafts.

                      However, I still don't fully understand how the same cam would react with different LSA or installed centerline. Say if my cam has a 113 LSA and the installed centerline was 108 instead of 110. How does that change things.
                       
                    • clinteg

                      clinteg Well-Known Member

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                      The higher LSA will provide higher vacuum and smoother idle and will have a broader power curve over a lower LSA cam. The lower LSA will have a choppier idle and typically you can’t run power brakes due to low vacuum. The lower LSA will tend to have a more “peaky” power curve. There are more differences but that’s just what I recall of the top of my head.
                       
                    • thesiren74

                      thesiren74 Well-Known Member

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                      .030 over 413 lunati bracket master 2 .480 lift .230 duration 900 idle.
                       
                    • Jimacuda

                      Jimacuda Well-Known Member

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                      • thesiren74

                        thesiren74 Well-Known Member

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