[Spridgets] 1275 vacuum advance

[Jon Paschke]

Hi 1330,
I understand that completely my example was say if you are just cruising 
on the road  with all the mechanical in and the vacuum in too and you 
hit a hill or overtake you step on the gas and the VA goes away to keep 
the timing safe.
Some people think the vacuum advance is for power - there is so much 
about ignition I don't know I could write a book. ;)
Jon

On 6/14/2013 10:09 AM, WeslakeMonza1330 at aol.com wrote:
> Not exactly.
> When you step on the gas the vacuum advance doesn't advance the 
> ignition.  However, as the revs increase the centrifugal advance in 
> the distributor advances the ignition and by a lot more than the 
> vacuum advance can manage (though I'd have to check that, though both 
> can vary).
> Too much ignition advance can lead to engine failure which is why the 
> static advance is best set on a rolling road on a modified engine as 
> too much advance can instantly be seen as a drop in power.
> In a message dated 13/06/2013 22:36:34 GMT Daylight Time, 
> jpaschke at bak.rr.com writes:
>
>     When you step on the gas
>     the vacuum goes away and retards the timing to keep the motor safe.
>     Racers don't use a vacuum advance as they have no use for good
>     mileage
>     and to much advance kills motors.