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Originally Posted by 83GTMUSTANG
Would An X Or Z Cam With 1.6 Rr's Do The Same To Your Valve As A E Or F Cam With 1.72 Roller Rockers?????
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No. That's what they're trying to tell you guys. A "bigger" cam is actually less strain on the components than a "smaller" cam with bigger ratio rockers. It's all physics, and leverage more specifically.
Think of the grade school teeter-totter. 300# kid on one end, and my 100# azz on the other. Put the fulcrum in the middle, and not such a big deal. But the closer to the fat kid that the fulcrum gets, the more effort is needed to get the fat kid off the ground. Same 100# azz on the other end, but the pivot has moved.
Take the 1.6 rockers, and do nothing else but replace them with 1.7's and you add a BUNCH of stress, forces, wear & tear on the valve train. You moved the pivot point closer to the fat kid. Plain and simple. Yes, you get more lift/duration for an inexpensive easy fix. But in this game the inexpensive/easy way will ALWAYS bite you in the azz. Name one other time that the cheap/easy way was the way to go.