You should have ported vacuum to the distributor (no vacuum at idle), as the
throttle is opened there is a vacuum drawn through the carburetor (and
engine RPM's increase). This ported vacuum is then applied to the vacuum
advance to advance the timing as the RPM's increase.
To set the initial timing you should use manifold vacuum (vacuum at idle)
typically found from the fitting at the back of the intake or the rear of
the base plate on the carb. (Brake booster fitting)
Keith
Initial timing with vacuum is what I used in the past.
I disconnect the distributor vacuum dashpot and plug
into the line there.
mike
--- KW <[EMAIL PROTECTED]> wrote:
You could use a vacuum gauge to set the ignition
timing. Just hook up the gauge to manifold vacuum
and adjust the timing for your highest vacuum
reading, tighten the distributor, remove the gauge
and test drive.
Easy to do with a stock or nearly stock engine, I
don't know how a big cam might effect the reading.
Keith
