Cam degreeing help me understand!

George Jets said

DartFreak75 has the whole crew working on this "Cam Degree Tutorial" and he is the Boss Man !

Everyone is contributing good info. What I find interesting is when they are advancing their cams by 4° they are working usually with the 3 keyway lower cam gear and turning the lower gear to the next keyway to get the 4° Advance, simple enough.

So when his upper much larger camshaft sprocket was miss marked by just one tooth that sent the actual Cam out of time by as much as 20° just by being 1 tooth off.

So the thing is the lower gear is driving the cam like a gear reduction taking many turns to turn the camshaft. Where as the upper larger Camshaft Sprocket is direct drive taking very little movement to turn the Camshaft many degrees.

So this is why it was so critical that he caught this upper Camshaft Sprocket Miss Marked problem.

Fascinating !!!

Click to expand...

Thanks bud. I have learned alot especially the importance of checking the lifter location and degreeing the cam even if your installing it straight up. I would have never imagined in a million years a company would would let something get like that slip thru. Im almost willing to spend the 22 dollars again to buy another identical one just to see if its the same way or correct. Once I get all the problems with my degree process sorted out im gonna stick it back in there and check it again just to see how far off it really is and how far I was off in my process initially. Inquiring mind man! Lol. I may put the wheel back in and set it up again in the morning with the used timing chain to see where its at. I can tell just by the position of the lifters that Its closer I still don't think it's exactly right tho im suppose to be 2 degrees btdc @.50 just watching it during rotation it appears to me that it is just starting to move at or right at tdc still closer than it was before I wasn't getting any movement until atdc.