Author Topic: timing  (Read 1870 times)

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Offline Al Smith

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Re: timing
« Reply #10 on: January 17, 2013, 07:45:29 pm »
Not really .Circumferance of a circle is pi times diameter .So 3.1416 times 4 equals  15.57 rounded off .15.57 divided by 360 equals approx .043" .So every degree would move the mark 43 thou .So theoretically if you advanced it 1/8" or .125 it would be around 3 degrees give or take a tad .

A timing wheel is probabley easier and the larger it is the more accurate .This is not to say however you can use a 16" wheel on a chain saw .About 6 inchs would be about it .

The advance of course is from top dead center but if you were just shifting it you could lock the engine down anywhere in the rotation .

Now if you are advancing the timing using the key you have to move it in direction of rotation .Using a slotted coil the opposite .

 

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