1. Hellrats

    Hellrats Just another dumbass

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    Lunati Voodoo 703 will be too big for that 2400 converter. That gear will kill it too. Go with a 3.55 gear or so with the Lunati Voodoo 703 and use a GOOD 3000 stall converter. I have one right now with a 3500 stall and it's a hell of a lot of fun and very drivable. If I take it apart again... hope not... I will try a 3000 stall. Any 268 grind is iffy with that combo. I have tried different "268" cams with 2400 stall convertors and they are just to tight. Converters have came a lot way in a few years. Don't be afraid to let that engine get to the cam.
     
    Last edited: Sep 23, 2021
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    • rumblefish360

      rumblefish360 Getting closer FABO Gold Member

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      That’s so true. A good converter will drive normal and yet hit good when it’s time.
       
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      • Bewy

        Bewy Well-Known Member

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        David Vizard, author of 30+ auto books & over 4000 magazine articles has some good advice:
        [1] The right cam cost the same as the wrong cam
        [2] Getting the LSA too wide will cost more tq than getting it too tight
        [3] if you want a smoother idle you do NOT widen the LSA; you reduce duration
        Why listen to DV? He dyno tested over 19000 cams. When I find someone who has tested more, then I will take their advice....
        The 5500rpm limit is imposed by the Edel Perf intake, not the cam. Might actually be a tad less with a 360, like 5300-5400. It would be stupid to install a 6500 rpm cam in a 5500 rpm engine. Very easy to over-cam an engine. Then the nonsense of using a hi stall c'ter to 'fix' the too-big cam. You don't need a hi stall c'ter with a 5400 top end. This is a cruiser with economy as some importance.
        DVs 128 rule calculates the LSA as 108 for a 360 with 2.02 int valves.
        Isky has a perfect shelf grind, the 270 mega. 221 @ 050, 108 LSA.
         
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        • roccodart440

          roccodart440 Well-Known Member

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          #1 and #2

          #3 isn't cut and dry.... There is a reason the factory cuts on a wide LSA and if you are running a larger duration but want a better idle, a wider LSA will help.

          LSA also has another function, lower LSA will increase cylinder pressure, higher will reduce it.
           
        • 12many

          12many Well-Known Member

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          Get something around 262-270 advertised, 214-221 @.050” max on a 106 LSA stuffed in at about 102 ICL or even less depending on running calculations. Now that the relentless crusades of “get a real Chrysler fast lobe cam” chatter seems to have mostly disappeared here lately, getting back to considering running a good old fashioned cam from any of the various companies out there has become fashionable again. If I were in your shoes, I would call Isky or better yet Schneider (they may still have a few cores) and see what they come up with for you with the gear etc you have. They both offer old fashioned service, and produce a fine product. :thumbsup:

          Example, they can put it on a tighter LSA
          LA Small Block Hydraulic Lifter Camshaft
           
          Last edited: Sep 23, 2021
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          • aaronk785

            aaronk785 Well-Known Member

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            My friend has the lunati 702 in a stock 340. It's runs strong with 3.55s.
             
          • Bewy

            Bewy Well-Known Member

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            Post #29.
            Yes, there was a reason the factory [ some, not all ] used wide LSAs. At the time, they didn't know any better!! Knowledge has been gained since.
            You only have to look at a MP catalog cam listing to see this:
            - slant 6: 108-104 LSA
            - small block: one on 114, most on 108-112, one on 106
            - BB: 115 to 106
            - hemi: 106-104
             
          • RustyRatRod

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

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            Higher LSA also enables more vacuum signal and allows vacuum accessories to be run more effortlessly.

            And I don't care WHO it is that argues for a narrow LSA. All things being equal, a wider LSA WILL HAVE a wider torque band. The peak won't be as high, but it will be a more broad curve. They each do have advantages.
             
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            • Brooks James

              Brooks James Dustoff

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              Call some cam companies, thats all they do 24/7. For Mopar i would recommend Racer Brown
              Ps Gas mileage and great performance ?
              Be prepared to do lotsa tuning and trying different combos
               
              Last edited: Sep 24, 2021
            • roccodart440

              roccodart440 Well-Known Member

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              They are still using wide LSA's today, 117deg to be exact.

              LSA isn't a cookie cutter number that always equates to a lower angle is better. It affects the idle, the power curve and cylinder pressures, and in FI applications a wide LSA is needed for function.
               
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              • RustyRatRod

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

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                Lest anyone forget forced induction, which almost always responds better to a wide LSA. Also, larger cubic inch stroker motors generally respond better to wider LSAs. So, I agree with you 100% that there really is no hard and fast rule. I really depends on the combination and what you're doing.
                 
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                • Brooks James

                  Brooks James Dustoff

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                  Agree, i had my cam ground at 113.5 to maximize the nitrous, added Benefit, smoother idle
                   
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                  • K.O. SWINGER

                    K.O. SWINGER Meeting in the alley since 1976

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                    I'll throw the 270 Magnum in there. It's an old grind but will definitely work with your setup.
                     
                  • rumblefish360

                    rumblefish360 Getting closer FABO Gold Member

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                  • Bewy

                    Bewy Well-Known Member

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                    My post #28.
                    [1] You guys should watch the Richard Holdener video, March 2020, where he tested three cams in an LS engine, identical except for LSA. 108, 112 & 120 LSA. 108 made more power everywhere.
                    [2] DVs SBC latest book has a list of cams, seven categories from the very mild Street & tow to Real Race. Guess what the LSA is for a Street & tow 400 engine? No, it's not 112 or 114. Try 105 LSA. What changes is the duration.
                    [3] Hot Rod Camshaft book, volume 11. Various cam tests, one LSA comparison. Identical Isky cams, except for LSA 106, 108, 110. "The 106 produced the most peak & average tq as well as the most average hp". The 110 made the most peak HP 583.6, up only 3 hp on the 106, but the 110 was down nearly 20 hp on the average numbers. I know which one I would be using...
                    [4] Last word to Sig Erson, of Erson cams: "The cam with closer lobe centers will always produce more power in the midrange than the a cam using the same profile & wide lobe center, & in many applications will produce more power all through the range depending on many variables such as the induction system, rod angularity & flow capacity of the ports."
                     
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                    • Tbro

                      Tbro Well-Known Member

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                      12many, shame on you for selling me an Isky Mega 280 on a 106. Now I get to have fun lol
                       
                    • 12many

                      12many Well-Known Member

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                      You get everything matched up you are gonna love it. “Addictive” is the word I’m thinking of! :steering:
                       
                    • rumblefish360

                      rumblefish360 Getting closer FABO Gold Member

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                      Oooooooooooooo

                      Ton-O-Fun on the horizon…..
                       
                    • 12many

                      12many Well-Known Member

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                      Getting the right cam is what it’s all about!
                       
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