If youâ??re racing, you wonâ??t need it, but if you decided to add it, you
could drill and tap the manifold for a vacuum line. The vacuum advance is more
of an economy device than a performance device and only comes into play at low
throttle settings. It requires a low manifold pressure (high vacuum) to do its
work, and wide open throttle (at whatever rpm) provides little vacuum. It adds
advance in addition to mechanical advance, and you wouldnâ??t want that in a
heavy load condition.
Duncan
(Texas)
> On May 9, 2016, at 8:42 PM, McKearn McKearn <mckearn2@gmail.com> wrote:
>
> Hi friends.
> I just installed a new Petronix Distributor and coil in my GT6. It runs
> much smoother now and seams all good. My question is since I am not able to
> use the vacuum advance (Weber carbs and Triumphtune manifold) am I losing the
> advance that you would normally get from the vacuum advance at idle only or
> does it affect the total degrees of advance at higher rpm also?
> Thanks. P.J.
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