[Spridgets] 1275 vacuum advance

[WeslakeMonza1330 at aol.com]

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 at 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 at 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