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<blockquote data-quote="Little Honda" data-source="post: 128191" data-attributes="member: 667"><p>Oexing,</p><p>with yr cam follower mod you are in the wear centre of the engine! PEI describes in one of his books, that they</p><p>had a glassed timing cover on a test engine during development, to observe lubrication there. He mentioned,</p><p>that they had visible sparking at high revs!</p><p>Years ago, I asked myself when watching the pulsing oil flow into my oil tank, if these pulses also appear at the</p><p>cam followers. If so, it can be asumed, that not every time, the oil comes out in the right position of the cam, ie,</p><p>when being under the cam follower. There is quite a wide arc, when oil may come out of the cam and dissapear</p><p>into the lower crankcase with zero lubrication to the cam.</p><p>Thinking, that the pulse comes out when the oil pump is at tdc, I did a calculation, how many revs the crank</p><p>has to make, to see the cam in the perfect position to lubricate the camfollower. I do not remember in detail,</p><p>but it was something in the sixties! That means , the majority of pulses fail their duty!</p></blockquote><p></p>
[QUOTE="Little Honda, post: 128191, member: 667"] Oexing, with yr cam follower mod you are in the wear centre of the engine! PEI describes in one of his books, that they had a glassed timing cover on a test engine during development, to observe lubrication there. He mentioned, that they had visible sparking at high revs! Years ago, I asked myself when watching the pulsing oil flow into my oil tank, if these pulses also appear at the cam followers. If so, it can be asumed, that not every time, the oil comes out in the right position of the cam, ie, when being under the cam follower. There is quite a wide arc, when oil may come out of the cam and dissapear into the lower crankcase with zero lubrication to the cam. Thinking, that the pulse comes out when the oil pump is at tdc, I did a calculation, how many revs the crank has to make, to see the cam in the perfect position to lubricate the camfollower. I do not remember in detail, but it was something in the sixties! That means , the majority of pulses fail their duty! [/QUOTE]
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