Well, as usual I got it backwards!! ;-) I was thinking you don't have
a lot of vacuum in the manifold until the engine RPM is increased. Ha!
Dumkoff!
Cheers!!
Jim
On Thu, Jun 13, 2013 at 4:04 PM, <WeslakeMonza1330@aol.com> wrote:
> **
> 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
>
>
--
Cheers!!
Jim Johnson
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