Ancient History

[Todd Knighton]

> >carbs don't use manifold vacuum to meter fuel.  All they use is the
> >depression created by airflow through a metering venturi.
> 
> How about SU carbys? Dont the pistons get sucked up according to
> manifold vacuum?
> 


They also use a velocity across a variable venturi to create it's own
depression (hence vacuum) though not directly the manifold vacuum.

Todd Knighton
Protomotive Engineering