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Message: <blockquote data-quote="Silver95bird" data-source="post: 1428101" data-attributes="member: 21743"><p>I was reading threads elsewhere, when similar topics came up. A few thoughts. Base circle smaller than stock won't change max lift. Only when the cam goes above oem base circle will it lift the valve off the seat. It's the geometry and the lash adjuster not hitting it's lock point. Also add in apparently the cam does not always touch the roller in the same exact place along the follower as it rotates.  This affects rocker ratio and ramp rates at the valve vs the cam. As the cam moves the follower also moves, and so does the geometry. So mapping the cam vs mapping the valve events may not be identical.</p></blockquote><p></p>