foreigneRS

Indeed the std regulator is a 1:1 rising rate.

Why I call it a rising rate is simply to distinguish between a normal fixed pressure regulator and one which increases fuel pressure against manifold vacuum/pressure.

Of course if we're being pedantic we should call it a manifold pressure linked fuel pressure regulator that rises and falls linearly with manifold pressure but its just how I tend to refer to them to keep things simple for folk.

In the case of regulators like the fse I still call them rising rate but refer to the different ratio rather than 1:1. (e.g. 1.2:1)