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Old 09-15-2008, 04:21 PM
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Quote:
Originally Posted by y2k600f4
I kept the RPMs around 2-3K (normal operation) during the 300 mile trip
and 200 or so miles of basically city driving in the last few months.

The ignition is New HEI
I'll have to look into the timing..
When running a camshaft with 230+ degrees duration, combustion at low RPM
(under 3000 or so) is very poor. If the tune up isn't just right plugs foul very
easily.

How does this relate to poor ring seal?

On a good running engine, combustion completes before the exahust valve
opens or shortly there after. When the tune up is not right, combustion never
completes, this results in fuel/carbon in the cylinder further contaminating
the next fresh charge. This fouls the plugs making a bad situation worse.
This fuel/carbon in the cylinder is not good for the rings, especially when
they haven't seated well.
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