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| Lets Debate Split Duration Cams! https://www.slantsix.org/forum/viewtopic.php?t=7900 |
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| Author: | 69a100 [ Sun Dec 21, 2003 9:19 am ] |
| Post subject: | Lets Debate Split Duration Cams! |
As both a Big block Chrysler and /6 owner and knowing what I know about big block cams that Chrysler designed, my question is this. Chrysler designed the split duration camshaft because they learned that a split duration actually helps get the bad air out of the motor and also acts as a ramming effect to help get fresh air in. NOW, with the bad or lame head design that /6's have, why don't they have split duration cams in them? Did Chrysler ever think of this idea in their testing of the /6? Why not even a split lift for that matter? Wouldn't a split duration cam be a better choice for power? Why, doesn't anybody make one, why are they all the same grinds? Why would I have to have it custom ground to my liking if I wanted one? Just a few thoughts for you folks to ponder and debate over. I will be following this topic. |
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| Author: | Charrlie_S [ Mon Dec 22, 2003 10:40 am ] |
| Post subject: | |
Let the reading begin first. Then the dabate. http://www.datsport.com/Racer_Brown_Menu.html http://www.iskycams.com/techinfo_index.html |
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| Author: | 69a100 [ Mon Dec 22, 2003 11:14 am ] |
| Post subject: | Cam Stuff |
OK Charrlie, The Isky article was interesting and I picked up a few things. Whats the deal with the other one? What chapter am I looking for? I didn't read the whole thing, but looked for something pertaining to the topic at hand. Who else? |
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| Author: | Charrlie_S [ Mon Dec 22, 2003 3:32 pm ] |
| Post subject: | |
I haven't read the complete, Racer Brown article either. But there were some good basic theory items in the first chapter. I have several tech pages book marked, but have not had time to read them yet. At this point, with my application, I think a cam with more exhaust event then intake, would be benificial. |
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| Author: | 69a100 [ Mon Dec 22, 2003 3:52 pm ] |
| Post subject: | |
Thats just the point! Why don't the choices of cams for the /'s give you this option without having it custom ground? I can go to any cam manufactor and thumb through it and find split cams for all mopars except the /, why? Everybody that grind cams are pretty much ALL the same for the /. |
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| Author: | steponmebbbboom [ Mon Dec 22, 2003 4:05 pm ] |
| Post subject: | |
my guess, two words: V8 mentality. |
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| Author: | 83Ram150dude [ Mon Dec 22, 2003 7:16 pm ] |
| Post subject: | |
Quote: my guess, two words: V8 mentality.
Try three words: Chevy V8 mentality.
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| Author: | Doc [ Mon Dec 22, 2003 7:19 pm ] |
| Post subject: | |
Quote: my guess, two words: V8 mentality.
Two more words, "It's cheaper".Dual pattern cams are more work to grind and your right, not many people know what really works well in a SL6. I have had a few dual pattern cams custom ground for Slants and they seemed to work well but I don't have any dyno data to know for sure. DD |
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| Author: | Dartvader [ Sun Dec 28, 2003 8:28 am ] |
| Post subject: | |
The difficulty comes in the fact that we seldom change only the cam, so it is hard to determine what effects only cam changes create. I had a custom grind made for my slant. It has about the same lift and duration as stock, with a dual pattern, (more exhaust lift and duration), and wider lobe seperation by a few degrees. It was ground specifically for eventual turbo application, but has many miles on it now with normal aspiration. It does indeed have a broader torque curve than the old stock cam, and seems to rev more freely, but I also ported the dead and put in larger exhaust valves. So there you go: what is the cam and what is the porting and valve change. We won;t know for sure from this upgrade, and you probably will not see this test run and dynoed in the car mags any time soon.... |
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| Author: | Eric F [ Wed Dec 31, 2003 12:20 pm ] |
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why not custom grind? I did for my slant comp cams didnt give me any greif over it they had good sugestions then i modified their sugestions a little. |
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