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Checking Camshaft Timing Degree Wheel

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Here's a good example of valve overlap on a degree wheel. Note the exhaust valve open and close time as it segues to intake valve open. This is called valve overlap, where we take advantage of intake velocity and exhaust scavenging. This helps cylinder pressure at high revs.
Ford Camshaft Timing - Degreed To Go

 Here's a good example of valve overlap on a degree wheel. Note the exhaust valve open and close time as it segues to intake valve open. This is called valve overlap, where we take advantage of intake velocity and exhaust scavenging. This helps cylinder pressure at high revs.  View Related Article

 

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