The vacuum advance is there to increase gas mileage and you sound like the
sort of driver who would get a benefit (I'm the opposite, I do stomp on the
gas all the time and like to get everywhere quickly!).
The vacuum advance advances the ignition at low rpm when the manifold
pressure is high. It's because it advances the ignition at low rpm/high
manifold pressure the gas mileage increases.
However, I haven't checked this stuff some someone else chime in if it's
only 75% correct.
In a message dated 13/06/2013 20:31:49 GMT Daylight Time,
bmwwxman@gmail.com writes:
Michael,
My understanding is that the vacuum advance kicks in at higher RPMs to
advance the timing of the distributor. I would guess that at higher RPMs
the engine wouldn't run as well and as efficiently without advanced
timing. Standard disclaimer - "I could be wrong". ;-)
Cheers!!
Jim
On Thu, Jun 13, 2013 at 12:28 PM, Michael Rowe <mdrowe@optonline.net>
wrote:
> Because of a size mismatch, my vacuum advance is not attached, and the
> take-off tube is blocked. I just had to redo it yesterday, because the
> blocking fell off and my idle speed doubled; otherwise, it did not
> obviously matter.
>
> If I do not stomp on the gas all the time, because I am an old fart, and
> because I currently have very limited use of second gear in this car,
does
> the vacuum advance actually do anything?
>
> Michael Rowe
------------------------
spridgets@autox.team.net
Archive: http://www.team.net/archive
|