Subject: Re: timing
Author: PEHA-@aol.com
Date: May 10, 2003, 9:32 PM
Post ID: 1712945143
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In a message dated 05/10/2003 5:21:30 PM Pacific Daylight Time,
Beaver-@comcast.net writes:
| A little variation in dwell does no harm . It is more important to get correct timing. |
I concur. But if the left side timing is spot on and you thereafter alter
the point gap on the right cylinder, you have just induced an error on your
left side timing. If, as you say, there is some "...slight tolerance in the
breaker cam profile...", what are you going to do about it. Close the gap
for the right side and your left side will now fire earlier than it did when
you set it. Open the points gap for the right side and your left side will
fire late. They are inter-related and you can't alter one side without
effecting the other. If you wish to split hairs, then your only option is to
alter the timing of the left as it relates to the right and split any
differences so neither is spot on. Its an exaggeration, but say your right
cylinder cam lifted one mm higher. If you set gap for the left, then the
right is too loose by 1mm. If you set the right, then the left is too tight
by 1mm. You could split to 0.5 mm variation and neither would be spot on.
But in either case, touching the points will instantly change the spot on
accuracy of the left side you timed first. Split the difference if you must,
but 125,000 miles on an Eldo timing the left side only worked for me.
Patrick
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In a message dated 05/10/2003 5:21:30 PM Pacific Daylight Time, Beaver-@comcast.net writes:<BR>
<BR>
<BR>
<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">A little variation in dwell <BR>
does no harm . It is more important to get correct timing.<BR>
</BLOCKQUOTE><BR>
<BR>
I concur. But if the left side timing is spot on and you thereafter alter the point gap on the right cylinder, you have just induced an error on your left side timing. If, as you say, there is some "...slight tolerance in the breaker cam profile...", what are you going to do about it. Close the gap for the right side and your left side will now fire earlier than it did when you set it. Open the points gap for the right side and your left side will fire late. They are inter-related and you can't alter one side without effecting the other. If you wish to split hairs, then your only option is to alter the timing of the left as it relates to the right and split any differences so neither is spot on. Its an exaggeration, but say your right cylinder cam lifted one mm higher. If you set gap for the left, then the right is too loose by 1mm. If you set the right, then the left is too tight by 1mm. You could split to 0.5 mm variation and neither would be spot on. But in either case, touching the points will instantly change the spot on accuracy of the left side you timed first. Split the difference if you must, but 125,000 miles on an Eldo timing the left side only worked for me.<BR>
<BR>
Patrick</FONT></HTML>
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