Quote:
Originally Posted by Hoop
Your timing is set at 19 degrees BTDC ... CRANKSHAFT degrees. On the distributor, that's 9 1/2 degrees advance since the crankshaft turns 2X the distributor.
The objective is to eliminate that 9 1/2 degrees of advance at the distributor.
You do this by adjusting the rotor just like you do all Model A timing.
Set the timing as you would a Model A. Make a mark to reference where the rotor lines up to the distributor body. Make another mark 5/16" on the body in the OPPOSITE direction of the rotor's rotation. Move the rotor (pin is still in place and engine does not turn at any time) to line up with the new mark and tighten it down.
(Do the math on the circumference of the distributor and you can convert the degrees to inches.)
This causes the rotor to arrive at the firing point later ... retarding that 9 1/2 degree advance (19 degrees at the crankshaft) and giving you 0 degrees of advance.
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I can see this would work and is akin to the "timing light" method I gave earlier except no timing light required.
How about removing the timing gear cover, and marking and drilling the timing gear with ANOTHER dimple 9-1/2 degrees of rotation away from the present dimple? If I have the thought correct, this wants to be AHEAD (clockwise) of the present mark (you're trying to match that "upper ended" Model B timing gear boss drilling. TDC is still TDC)
Of course one will have to be careful not to confuse the drillings henceforth.
Joe K