Randall,
you'e sure good at 'ascii art' diagrams clearly explaining details of our
cars' 'innards' - thanks!
Carl
'64 TR4 since '74
PS; I added some arrows to indicate direction of air flow..
<<Maybe a little ASCII art will help (if you view it in a fixed pitch font
<g>) :
Throttle closed
- ---------------
|
|
intake X manifold
|
|
- -------^-------
port
Throttle open
- ---------------
/
/
intake X manifold
/
< / < < < < < < < < <
- -------^-------
port
As you (maybe) can see, when the throttle plate is closed for idle, the port
is on the outside, where there is little or no vacuum. When the throttle
opens, it moves across the port, putting the port on the inside, where it
'sees' the intake manifold vacuum.
Randall>>
|