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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
This is a cool graphic that displays the overlapping of the exhaust events on a merged or non- split system.

The overlap of the red bars is where two exhaust valves are open at one time.

On a split system, every other line would be on one bank of cylinders.

Originally Posted by 304065 View Post
I like to be organized so I made the following chart to help me with cam timing. Basically the operation is not more complicated than that explained in the factory manual, but I like to overcomplicate things. This chart shows what each piston is doing. But the key point, in my case, comparing the timing of Cyl1 with Cyl4 is that when Cyl1 is at the timing point (labeled OC in the chart) Cyl4 is at the firing point (labeled TC in the chart). Of course I know that the firing point is not exactly TDC but you get the idea. Green= power, Gray= exhaust, Blue= intake, Red= Compression.

Old 06-15-2010, 02:53 PM
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