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Cam question on a 383

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  • Cam question on a 383

    I was wondering if anyone could help on choosing the right cam for my 66 charger. I want it to sound good at idle but I dont want to over cam it either. It is a stock 383 with 906 heads with headers and 3.23 gear with an automatic. I plan on a performer RPM manifold and a 750 edelbrock carb. I was looking at a Elgin cam with .443/.465 lift and 280/290 adv duration, 214/224/ duration @50 was wondering if anyone has ever had this cam and if it sounds like it would work. Would appreciate any help!

  • #2
    Can't really answer your question specifically, but I have talked to a few people that like the 440 6pak cam. Maybe check the specs against each other?

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    • #3
      Originally posted by 1fastone View Post
      I was wondering if anyone could help on choosing the right cam for my 66 charger. I want it to sound good at idle but I dont want to over cam it either. It is a stock 383 with 906 heads with headers and 3.23 gear with an automatic. I plan on a performer RPM manifold and a 750 edelbrock carb. I was looking at a Elgin cam with .443/.465 lift and 280/290 adv duration, 214/224/ duration @50 was wondering if anyone has ever had this cam and if it sounds like it would work. Would appreciate any help!
      I'm running a comp xe 268h in a simlar 383. 224-230 @.50 ,does a good job. idle might be smoother than you want.

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      • #4
        That cam has the same specs as the summit cam i have in my 383 but i have ported&milled 516s w/oversized valves,the cam does not have a lumpy idle and the lower evd is a lil soft might be the loss of velocity from the larger valves or could be the rpm eddy,its in a ramcharger 4x4 w/stock exhuast manifolds,3.55 gears & 35" tires doesnt help my off the line performance. once she hits bout 2200 rpm's she pulls hard up to 5000rpm's I'm thinking about getting a voodoo 226/234 494/513 it has a 1800 to 6200 rpm range which will fit in well with the RPM eddies 1500-6500 range. with a stock motor the elgin cam might sound better and have a more responsive bottom end.

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        • #5
          66 charger should be a good bit lighter than a 4x4 ramcharger. i've got plenty of low end in a 64 polara.

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          • #6
            a rule of thumb on stock 383's; they're easy to over cam. a '66 charger big block will probably weigh 4100-4200lbs. a camshaft with some "rump" will probably kill a bunch of low rpm torque. the ex268 recommendation is probably good. another comp cams 21-305-4 (magnum replacement, i've used it before) is a good profile. i like the mopar 272-.455, it's better than a stock magnum cam. my favorite "non-loper" is an engle k56/58, retainer to guide clearance must be checked with this cam. also you will need a valve spring change with any upgrade. none of the above mentioned cams will lope, but will run good.

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            • #7
              I like triggerbears cam recomendation. Of course, knowing your gear ratio and tire size would help zero in better.

              The Good idle chop sound you want is due to a tight centerline on the cam. A 110 produces a good chop. The lower the number, the greater the chop. 108 starts to sound like a lumber jack goin for it, 106 sounds like a lumber jack on crack going for it.

              The lower C-line number will not help the low end so well though. (Been there done that)
              '73 Cuda, 4spd, 360 - '79 Magnum, 318 - 400 swap

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              • #8
                It has 3.23 gears and 235/60/15 tires. Thanks to every one's replys and I am still listening and taking it all in.

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                • #9
                  As some have mentioned, the cam choice may dictate the need for other changes, how far do you want to go? My cam choice would be in the range of 0.450 to 0.470 lift and duration @ '50' around 205 -215 deg. You really need to keep your low speed torque in such a heavy car.
                  One of my favorites is Crower #32240, or a bit warmer is #32241.
                  Use new springs.

                  .
                  Quality Engineered Components
                  EarlyHemi Parts and Tech
                  http://www.qualityengineeredcomponents.com/

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                  • #10
                    This Crane, for example, is much like the one you posted, but with more lift for starters, which is good. But notice the duration numbers. Advertised vs. .050 on a cam vs. cam basis.

                    Elgin cam; 280/290 adv duration, 214/224/ duration @50 lift .443/.465
                    Crane cam; 272/284 adv. dur., 216/228 dur @ .050 , lift .454 / .480
                    http://cranecams.com/?show=browsePar...tType=camshaft

                    Here we see very similar durations @ .050 but not so similar advertised durations. This indictes a quicker riseing lift for the Crane cam. The Crane is on a 112 Centerlne. It will idle smothly for the most part. But the quicker opening valves will allow more power to be made.

                    Crane cams Vs. Comp Cams EX262 Hyd. cam;

                    Crane cam; 272/284, 216/228 dur @ .050 , lift .454 / .480 112* (C-line)
                    Comp cam; 262/270, 218/224 dur @ .050- lift .462 .470 110* (C-line)

                    Same read as above. But.

                    Here you see the Comp cam with 4* @ .050 less on the exhaust side and 2* more on the intake. This is a total of 6* less spread between cams. Knowing how poor the heads flow, and listening to Dick Landy among a few, in that the MoPars can use 8* - 10* spread in the split duration cams with use of stock heads, IE; as cast/lightly ported.

                    The Comp cam will "Chop" more at idle and will have a good "Punch" up top. That may be the cam you would want for a good idle sound and performance. It'll perform much better with well preped heads with a light porting and more likely, very well out peform the Crane with such head prep.


                    What it says in the Comp Cams catolog about the XE262H cam;
                    HYDRAULIC-Excellent response, good Hyd. Hyd. 1300 to 5600 (RPM range) 21-222-4 XE262H 262 270 218 224 .462 .470 110

                    mileage, stock converter 3.23 gear.
                    Single-Bolt



                    http://compcams.com/technical/Catalo.../40-49_229.pdf


                    '73 Cuda, 4spd, 360 - '79 Magnum, 318 - 400 swap

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                    • #11
                      OH, you could step up one cam, in size, refer to catologs to see, and it would still work preety good. The next size up in cams should work with the stock converter OK. More stall wouldn't hurt, but is not a "Needed" part to change.

                      IMO, you have a good eye in the duration @ .050 choice you made.

                      I would not exceed the next size up cam from the examples in the above post I made.
                      '73 Cuda, 4spd, 360 - '79 Magnum, 318 - 400 swap

                      Comment


                      • #12
                        Originally posted by rumblefish360 View Post
                        This Crane, for example, is much like the one you posted, but with more lift for starters, which is good. But notice the duration numbers. Advertised vs. .050 on a cam vs. cam basis.

                        Elgin cam; 280/290 adv duration, 214/224/ duration @50 lift .443/.465
                        Crane cam; 272/284 adv. dur., 216/228 dur @ .050 , lift .454 / .480
                        http://cranecams.com/?show=browsePar...tType=camshaft

                        Here we see very similar durations @ .050 but not so similar advertised durations. This indictes a quicker riseing lift for the Crane cam. The Crane is on a 112 Centerlne. It will idle smothly for the most part. But the quicker opening valves will allow more power to be made.

                        Crane cams Vs. Comp Cams EX262 Hyd. cam;

                        Crane cam; 272/284, 216/228 dur @ .050 , lift .454 / .480 112* (C-line)
                        Comp cam; 262/270, 218/224 dur @ .050- lift .462 .470 110* (C-line)

                        Same read as above. But.

                        Here you see the Comp cam with 4* @ .050 less on the exhaust side and 2* more on the intake. This is a total of 6* less spread between cams. Knowing how poor the heads flow, and listening to Dick Landy among a few, in that the MoPars can use 8* - 10* spread in the split duration cams with use of stock heads, IE; as cast/lightly ported.

                        The Comp cam will "Chop" more at idle and will have a good "Punch" up top. That may be the cam you would want for a good idle sound and performance. It'll perform much better with well preped heads with a light porting and more likely, very well out peform the Crane with such head prep.


                        What it says in the Comp Cams catolog about the XE262H cam;
                        HYDRAULIC-Excellent response, good Hyd. Hyd. 1300 to 5600 (RPM range) 21-222-4 XE262H 262 270 218 224 .462 .470 110

                        mileage, stock converter 3.23 gear.
                        Single-Bolt



                        http://compcams.com/technical/Catalo.../40-49_229.pdf


                        I run that XE262H CompCam. Sweet little cam for the street. I have a 383 with blended 346 heads, headers, Performer RPM intake, Holley 750 carb, 3.73 rear gears. The performance range is from about 2500 to 5500 RPM's. I've taken it to 6000 RPM's a few times just to see how it performs, but the best shift point is 5700 RPM's. It winds up to that with no problems. From a stop, just hitting the throttle, I can blow the 275/60/15 off like they were skinny tires. With 10 degrees timing advance it has a noticable idel, but I run it at 18 degrees which smooths it out a bit. The 262 is a little "bigger" than the stock magnum cam that came in the RR 383.

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                        • #13
                          The cam I like for a street "B" engine with moderate compression and head flow, stock exhaust manifolds and full exhaust system is the Comp Cams 275DEH. It is hydraulic, with 275/284 duration, 219/235@.050" lift, .462/.482" lift at the valve, 110LSA. I have recommended this cam before, based on personal experience in my own '70 Challenger R/T, 727, 3.23 gears, HP iron manifolds, DP4B dual plane intake, 750 E-brock carb. I used a '77 400 shortblock, with stock 8:1 pistons, milled some "906" heads .045" (.054" on the intake side so the intake would fit again) with stock 2.08X1.74" valves, Crane single spring & retainer KIT (Summit/Jegs carry the kit), and stock rocker gear. This combination sounded better and pulled like a 440 Magnum! My buddies swore I had a stroker 451 or something, it had such a BROAD powerband. This was before the Xtreme Energy cams had come out, so I cannot condemn their recommendation in earlier posts. We did run a 275XE Hi-Lift (.525"lift) in a 360 crate shortblock with E-brock alum. heads a few years back, and it was VERY impressive. But I can certify the 275DEH's effectiveness in my heavy E-body with 3.23 gears and a full iron exhaust system!!! It was outstanding in my maybe 9:1 junkyard build with fresh heads, sounding like a Street HEMI at idle, with no loss of bottom end and a never-ending pull on topside. I love this cam in a limited "B" build, it would probably do well in a heavier vehicle with a 440 as well!!! RB

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                          • #14
                            I would think the cam you are looking for would be similar to the one I want for my 440. This Lunati cam is what every one has recommended to me. Looks pretty close to the cams mentioned here. I have talked with a guy that runs this cam and loves it

                            http://store.summitracing.com/partde...2&autoview=sku

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                            • #15
                              might shoot an email to Scott Brown - Straightline performance knows cams

                              "Good luck on your project"

                              1970 Road Runner

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