is dwell? This is the time when the points are closed and the
coil is being recharged.
Since there are six cylinders in our engine, the distributor shaft has
The distributor goes through six complete firing cycles during each
revolution. The points are either closed or open during these twelve
The most significant aspect of the dwell window is to recognize when
the actual spark occurs. Since the rotation is clockwise, the front
of the close window is when the points first come together. Then they
remain closed until the window passes. The spark occurs just as the
Each of the six "closed" windows has the spark location at the
end of the window.
The dwell setting that we were trying to achieve
was 36 degrees.
We managed to set the points as close as we could to
.018 and our dwell reading was 34 degrees. So the question was, "Is
this close enough?"
Looking at this diagram, you can see that our lower dwell reading of
34, only changed the spark timing by 1 degree. Trying to change the
ignition points gap setting to get 2 more degrees was probably not