Venturi effect with efi throttle bodies

[Bruno!]

On Fri, 28 Mar 1997, Tom Cloud wrote:

> >Hi all, 
> >
> >I was wondering about needing a venturi in a TBI system to aid in 
> >increasing air speed through a manifold, as this is used to suck air/fuel 
> >from a carb into the airstream in a carbed system. Is this unnecessary in 
> >EFI? wouldn't low-end torque suffer due to a lack of air speed at low revs?
> 
> I think I have the same mental definition as you -- venturi
> is the little pipe stuck into the air flow that the fuel is
> sucked out of ... right?  But, I think I'm wrong.  The bigger
> picture is that a venturi is a narrowing in a flow path
> causing a higher velocity in the flow.  If that's right, then
> the carb or TBI throat is a venturi.  Is that right?

It might be a confusing question to ask. The venturi I'm talking about is 
the outer venturi found in a carb throat.

Anyone with any ideas?

		Bruno. (b.marzano at student.canberra.edu.au)

	Early to bed, Early to rise
	Makes a man and woman miss out on the night life
						-Morphine