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Classic Goldwing Technical Forums
GL1100
Time for me to address the 800lb Gorilla in the room.(Engine knock thread) REVIVED!
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<blockquote data-quote="scdmarx" data-source="post: 18119" data-attributes="member: 92"><p>Degree wheel on the camshaft and dial indicator on the cam lobe. </p><p></p><p>A degree wheel can be made. A dial indicator can probably be found at Harbor Freight. Or borrowed?</p><p></p><p>You would measure how many degrees of cam rotation the valve is lifted off the seat. (<em>How long the valve is open</em>)</p><p></p><p>Usually the higher lift will have the longer duration and more overlap, but it all depends on how the cam was ground. Camshaft configuration dictates heavily on just how the engine is gonna "breath".</p><p></p><p>This is just a SWAG, but I'm guessing the shorter lift cam would be from the later engine. Shorter lift would improve low speed performance and smoother idle, with less overlap improving on tail pipe emissions and fuel economy.</p></blockquote><p></p>
[QUOTE="scdmarx, post: 18119, member: 92"] Degree wheel on the camshaft and dial indicator on the cam lobe. A degree wheel can be made. A dial indicator can probably be found at Harbor Freight. Or borrowed? You would measure how many degrees of cam rotation the valve is lifted off the seat. ([i]How long the valve is open[/i]) Usually the higher lift will have the longer duration and more overlap, but it all depends on how the cam was ground. Camshaft configuration dictates heavily on just how the engine is gonna "breath". This is just a SWAG, but I'm guessing the shorter lift cam would be from the later engine. Shorter lift would improve low speed performance and smoother idle, with less overlap improving on tail pipe emissions and fuel economy. [/QUOTE]
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Classic Goldwing Technical Forums
GL1100
Time for me to address the 800lb Gorilla in the room.(Engine knock thread) REVIVED!
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