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<p>I have a couple of old Sun distributor testers. I check coils
with them. You can tell if the problem is with cranking or high
speed. I had a 6cyl 292 chevy that would cut out above 2500
rpm. I had checked all the valves, rebuilt the carb, replaced
the points etc. I put a "new"rebuilt distributor on the sun
machine, and found that the distributor shaft was worn and with
the new bearing it had a clearance of nearly 0.010 At 2000 rpm it
started to oscillate. I took it apart and found that the
distributor must have been in a watery junkyard for years. I took
apart 3 distributors and ended up building up the wear on one
shaft, then building a bushing out of a piece of Nylatron.
Nylatron is a type of nylon that is impregnated with graphite. I
use it for a lot of bushings. I bored the distributor out and
replaced the top bushing with nylatron and the bottom one with
brass. By honing, I got the top of the shaft to 0.000 side
movement, and the bottom with the gear to 0.005in... Then I set
it back up and tested the coil firing. This time the coil worked
fine up to 5000rpm until I set a hair dryer to warm up the coil.
With a infrared temp gauge at 140 deg, the coil would break down
at 2000 rpm. This time I tried an Accel Super Street/Strip coil
45000V, it would fire a 1/2 inch blue spark up to 6000 rpm. I
installed the distributor and coil in my old winch truck, and it
had twice the power as before.<br>
Cecil<br>
</p>
<div class="moz-cite-prefix">On 11/5/2019 7:19 PM, Gilbert Schwartz
wrote:<br>
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cite="mid:1329784174.224707.1573003178560@connect.xfinity.com">
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<div style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);"> I would like to try and
delve into the wide knowledge and expertise of the members
within ATIS. <br>
Is there any acceptable method of determining if an ignition
coil is good short of installing it on a running engine. Our
1949 AC G would not start a few days ago after being parked for
a short period of time. A quick observation determined the
contact points were beyond use. I went to the local auto parts
store and was advised I probably should replace both the points
and of the condenser because they felt like that condenser went
first and it caused the points to burn up. With this information
I also purchased a new coil even though I wondered if the coil
was a bad. </div>
<div style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);"> Bottom line; Is there any
way to bench test a coil? We have several used coils laying
around here of questionable viability. I would like to pitch
them if they aren't any good. <br>
I appreciate anything you can tell me. </div>
<br>
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