[TR] Dome oil

[Randall]

> As I understand it, the idea is that the increased velocity of the
> air through the venturi (due to the piston being held in position by
> the damper / oil) increases the vacuum that is applied at the base of
> the needle and which sucks more gas out of the jet tube, giving more
> fuel for a given quantity of air.  That's what enrichens the mixture.

Ditto.  Higher velocity means more venturi effect.  This is how 'normal'
fixed venturi carbs flow more fuel when the air flow increases.

-- Randall