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[Gmecm] Reluctor / rotor phasing
- Subject: [Gmecm] Reluctor / rotor phasing
- From: bcroe at juno.com (bcroe@juno.com)
- Date: Wed Sep 14 20:04:04 2005
14 Sep 2005 "Tracy and June Hooker" <thooker@nmsu.edu> writes:
> So, I guess a rephrased question is: How do I know
> where to lock down the vacuum advance plate?
>
> Tracy
Tracy,
The spark gap will be constant and pretty small, as long as
the rotor and plug wire tower overlap. If the rotor tip were
12 distributor rotation degrees wide, and the spark tower 10
degrees wide, the pair would overlap for 22 degrees. That
might exceed the variation in spark timing, so they could
always be somewhat overlapped. You should never have
sparks outside the overlap range.
For a mechanical distributor, you might vary the vacuum
with a hand pump over its range, while watching through
a transparent/holed cap. Turn the dist to keep the engine
running as needed, you will need to reset timing after
you get the phasing set.
Bruce Roe