I beg to differ Chip. As the rubbing block wears down, the gap will
_decrease_, until it reaches the point where the point doesn't open
sufficiently to stand off the inductive kick of the coil and the spark
goes across the points gap instead of the sparking plug gap.
Donald
> From: Chip19474@aol.com
> Date: Wed, 12 Jul 2000 07:58:18 EDT
>
> In a message dated 00-07-11 12:39:33 EDT, jsimmons@intrepid.net writes:
>
> << range of .014 to
> .016 for the gap and for some reason I thought, "how odd, its a range and
> not an exact number". So here is the question, and I'll increase the range
> to .013 to .017 just for grins; What difference does it make to the running
> of the car setting the point gap to .013 as compared to .017? >>
>
> John,
>
> Good reason to check out Dan Masters' Electrical Mtce Handbook...chapter 6,
> page 23....it all has to do with "dwell" or "dwell angle" - how long the
> points remain closed to allow a strong magnetic field to build up to supply a
> strong spark. The suggested range of .014 to .016 assures that if you set
> the point gap anywhere in between those 2 settings, the dwell will be optimum
> for the highest spark voltage capable from your ignition system. Since the
> rubbing block on the "moving" side of the point set wears down, it's a good
> idea to set point gap on new points at the lowest setting (.014")....as the
> rubbing block wears down the gap will increase within the allowable
> range.
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