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Discussion Starter · #1 ·
First off let me pretense this thread with the info that I am NOT very versed in the TwinCam motor or its functional enginering.
That being said,,,, I have read many threads discussing the pros and cons of different cam configs and I was wondering,,, If you cam a bike for high rpm HP and loose your low end torque, or you cam for torque and loose the high end scream, what is the poosibility of using TWO different Cams in a twin cam.
Would it be possible to cam the leading cylander (front) for torque to get that snot off the line and then cam the trailing (rear) cylander for the high rmp scream and therefore bridge the gap and give a little on both ends?????
If Yes,,, why is it not being done?
If NO, again Why?
Please be technical in your responses, I really would like to learn something here.
Thanks
 

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The pistons rotate together at the same RPM. Would be like adding a turbocharger to one bank of a V8 .
 

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Greg, they actually have tried that in Europe with assymetrical turbocharging, didn't work.
Using different cam timing on each cylinder of a engine that is already naturally unbalanced would likely produce enormous internal stresses as in a way one cylinder would always be working against the other to some extent regardless of operating conditions and cause an enormous amount of vibration. Go ahead and move the front cam one tooth, this in effect would be similar as each cam works one cylinder, and see what happens.

Read the thread with the variable valves. That is a much simpler way to achieve the same thing as you effectively alter valve timing on the fly on a stroke by stroke basis.
 

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Just as a note, HP is a math equition of torque and RPM. All you are doing is choosing where you want your torque. The higher up the RPM scale you put the torque, the more horsepower you get. Of course, now you have to rev the engine up higher to get to that torque range.
 

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Discussion Starter · #5 ·
Thanks Gentlemen (and the rest of ya too LOL)
As for "adjusting" the linkage alignment of one of the cams Hippo,, I did that once on a car and the results were catastrophic. Is the Twin Cam an interferance engine?????
When I did it (accidentally by the way) on a car I grenaded the rear overhead cam right off the engine and blew the #3 cylander to the point that the piston bound and the rod snapped and punched out the side of the block, and pan.
I think I'll let the pros do Cam work until I get better versed on the motor (and get the proper tools)
hehe, I lerned the importance of using a center punch to mark my mesh alignment that day rather than relying on a scratch with the edge of an awl and a grease pencil.
Thanks again!!!!
 
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