At 09:19 AM 8/22/01 , Nolan Penney wrote:
>I would not expect vacuum advance (or lack of) to cause high speed/high rpm
>This isn't the range that the range that the vacuum advance works in. This is
>arena of the centrifugal advance.
Indeed. At full throttle, you have no vacuum, thus no vacuum advance.
The purpose of vacuum advance is mainly to give better
part-throttle efficiency and fuel economy.
For example, the vacuum retard on a circa '72 car works only at idle
and has no effect when actually driving.
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