Injector Confusion

[Greg Hermann]

>Be careful, a rising rate regulator is just a vacuum reference regulator, it is
>not a function of RPM, but a function of manifold pressure (or wherever your
>taking the vacuum signal from).  When pressure is low (vacuum), the
>diaphragm in
>the regulator doesn't get any help from local air pressure to fight against the
>fuel pressure on the other side.  The only thing fuel pressure is pushing
>against is spring tension.  When pressure is high (WOT at any rpm or boost
>pressure), the diaphragm has the spring pressure and the local air pressure
>pushing against it, requiring a higher fuel pressure to lift the opening to the
>bypass, resulting in a higher fuel pressure.  It is rpm independent.

NO!

What you have described is a manifold pressure referenced regulator. A
rising rate regulator adjusts fuel pressure by some MULTIPLE of manifold
pressure change.

Greg