TurboTommy

Is there such an animal?
If so, where could I get one?

TRP951

why would you want to be able to adjust fuel pressure from the cabin? I just set mine to the correct pressure and leave it

anders44

this sounds bad, pressure should be set, and mapped thereafter, with a reference hose for boost/vacum, if you adjust it, you have to remap.

TurboTommy

It would be great if ya could just answer the questions; I got my reasons.
One of them is that we have mandatory ethanol content in gasoline now.
And it varies slightly with the different brands and where you live, etc.
Varying ethanol content produces varying AFR.
Also, ambient temps affects the "weight" of fuel going through the injectors.
Don't assume that "set it and forget it" and you'll always have the same air/fuel, no matter what the time of year, etc.