On Sat, Jun 27, 2009 at 10:41 AM, David Beierl<dbeierl@attglobal.net> wrote:
> ......

> If anything, flow would be reduced when the engine is working, since MAP
> would rise causing a corresponding rise in regulated fuel pressure.

Thanks David.

Ok, so I had to google MAP....  :)

I'm sure I could google these principles, but if you or someone has the time....

Assuming:

at higher engine RPM's, (intake) manifold absolute pressure rises,
more vacuum applied to diaphragm side of FPR, more fuel "allowed" into
fuel rail, more fuel used.

Does this mean that the increased demand on what we assume is a
constant rate of fuel flow, "pushes" ID of tank outlet past it's
limits? i.e. ID should be larger (as later model year tanks are) to
meet demands of this increased fuel use?

Neil.

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines