gcc, 68K and ignition advance
Dale Ulan
ulan at ee.ualberta.ca
Wed Nov 30 14:05:59 GMT 1994
>
> On Tue, 29 Nov 1994, Wouter de Waal wrote:
>
> Some one probably already jumped on this, but it's the venturi vacume,
> and it increases as you suck more air into the carb.
>
> If you could get two carbs off of some newer cars, you could control the
> mixture with your computer too! It might be real fun!
>
The VW is the only car I've seen that uses venturi vacuum to advance the spark.
That's because they didn't put a centrifugal advance in their distributor.
Actually, this isn't always true... some VW's did have a cent. advance.
Everybody else uses a ported or manifold vacuum source to advance the
spark under light loads, and they use a centrifugal advance to move the
spark up at higher speeds.
-Dale
More information about the Diy_efi
mailing list