Theoretically, if the point gap is correct, the dwell should also be correct or nearly so.
Adjustment with a dwell meter produces more exact, consistent results ...
Source: AutoZone dot com
The dwell angle is the time or degrees in which the points are closed. The less gap, the more dwell. When the dwell is right on spec, the point gap should be also according to the OEM. Generally if you have a dwell meter, you don’t recheck the point gap once you have the dwell right. You do need to reset the timing after changing the dwell angle.
Source: community car talk dot com
Points that have been in use for some time develop a peak on one face that corresponds with a crater on the other, caused by spark erosion as the points open. When this happens, a feeler gauge no longer gives an accurate measurement of the gap.
A dwell meter measures the angle of rotation of the cam through which the points are opened and closed, and registers the dwell angle - the period when they are closed.
It can therefore be used to check the gap on worn points with more accuracy than a feeler gauge, and can be used without removing the distributor cap and with the engine running. The meter can also, of course, be used when fitting new points.
Source: how it works dot com
This topic can be argued or debated until the cows come home.
As said earlier, setting the point gap is an estimate ONLY of correct dwell angle. When all components are new, a correlation between dwell angle and gap can be established, hence the point gap suggestion that we may see in a service manual. That is good when all components are new!
However, why would we NOT want the dwell angle to be correct, over that of a point gap estimate only?
And by the way, ignition systems using electronic triggering also incorporate a dwell angle.
We don't see it, we don't adjust it..... but it is incorporated into the design.
Dwell Angle represents the angle (or time in degrees) at which the system undergoes coil saturation.
The remaining angle is the duration in which the system discharges the high energy voltage to the cylinder's spark plug, and allows a very short duration of coil cooling.
Do as you wish..... it's your engine!
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