Soo, i can set pretty much any psi i want (with the top adjuster). But vacuum or not psi does not change?? Now to test the rest of the system IF i pinch the return i can spike and even hold higher psi if i want. Soo its gotta be something to do with the diaphragm orrr idk because i have checked it over and over and wrapped my fingers around the area it circles the top when connected all up and running i cant find any leaks of any sort.... the bigger "orifices" just make it super sensitive and it will jump from 30-60 and up but i can get what ever i want just gotta go super slow. Its not the orfices just cant get air to effect to effect psi. Spring? Leaks? Diaphragm?

im stumped!

 

This is it.... nothing to it. Just wont work! Like it should lol

 

Well i got to it and just kept re doing it lol. finally got it to go to 70 with vacuum and 82 with a full blip of the throttle.

... point is this regulator sucks and is really finicky.

 

From my experience they don't like high fuel pressure, get a external regulator or don't run high pressure.

 

This. Whats a good fuel pump then. Im on the aem fpr and aem pump....just waiting for one of the two to stop working one of these days haha.

 

I have no complaints with the walbro fuel pumps. I just need a fuel rail barb to hose adapter and a good regulator.

 

Hows everyones 1:1 rising rate? Super accurate or does it seem more of a lower percentage or rate?

 

Did you play around with the changeable orifices? I think I remember using the largest one to get the best steady pressure when I ran this regulator.

 

I did. The largest seems to be really sporadic. The smallest was accurate but i think spring was to compressed for vacuum or boost to change psi. Middle was the only thing that let me do both. Its just not rising per 1:1 ratio. Its sits at like 70 @ atmospheric pressure 61 with vacuum and like 72-76 with 8psi

 

That's odd man. I wonder if it's bad? Like a leak in the rubber diaphragm.