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The CAS is a superb bit of kit. Giving the cam poition at every 1deg.
The problem is you can't reliably use the camshaft to know where the crankshaft is unless the cams are driven by anti-backlash gears. The cambelt flaps around all over the place giving inconsistant readings. Thus the spark occures at different times of the stroke. Not good.
You don't really need such a fine resolution for position.
All you need is for the cam position to say when #1 is approaching TDC, then for the crankposition to say when to fire. This is usually a time(calculated from engine speed which will also be inaccurate if taken from the CAS) after the last tooth count.
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