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The simple way, find top dead center, install the cam aligning the marks on jesel or chain, run the intake lobe up to max lift, with degree wheel already on, and aligned, check your reading at .050 after, write down the number on the pointer, go to max lift, write down the number on the pointer .050 before, add the 2 numbers together, and divide by 2. That's your intake centerline. For example, if one reads 156 and the other reads 55, your in at 105.5. On a 109 centerline cam, you are advanced 3.5 degrees.Remember, when you are turning the engine in a backwards motion, go a little past .050 and come back to it in proper crankshaft rotation to get a proper reading. Hope this helps.
 

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RED ROCKET
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8,633 Posts
go to comps website and the have the instructions in a pdf file...i did and printed it out..its pretty easy to figure out.
 

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Long Live The King
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104,069 Posts

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Addicted To Nitrous!
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3,372 Posts
The simple way, find top dead center, install the cam aligning the marks on jesel or chain, run the intake lobe up to max lift, with degree wheel already on, and aligned, check your reading at .050 after, write down the number on the pointer, go to max lift, write down the number on the pointer .050 before, add the 2 numbers together, and divide by 2. That's your intake centerline. For example, if one reads 156 and the other reads 55, your in at 105.5. On a 109 centerline cam, you are advanced 3.5 degrees.Remember, when you are turning the engine in a backwards motion, go a little past .050 and come back to it in proper crankshaft rotation to get a proper reading. Hope this helps.

Very good explanation!!
 
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