Subject: RE: timing
Author: Jesse Open
Date: May 11, 2003, 8:15 AM
Post ID: 1712948741
Rotating the distributor after MINIMIZING the inter-cylinder DIFFERENCE
will move the timing on BOTH cylinders .
It will never be "perfect" no matter how good you think you are.
Especially if you seek perfection while accepting the accuracy of the
factory marks.
These are not at all finicky beasts and I think "perfect" is far from
a requirement. Getting the timing between the cylinders as close as
reasonably possible just makes for a nicer running engine.
I never said it was necessary just that reasonable compromize CAN
usually be acheived. In any event the factory marks are seldom "spot on"
PEHA-@aol.com wrote:
| In a message dated 05/10/2003 5:21:30 PM Pacific Daylight Time, Beaver-@comcast.net writes:
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 |