adjustable regulator question

[streetknights]

installed a new accufab billet regulator, when i put the vacuum line on the fuel only drops two pounds, is this normal??? with my old non adjustable regulator the fuel dropped six pounds

 

[streetknights]

huh

help

 

[Lee_Burough]

That is consistent with my experience with an accufab and another billet AFPR.

Must be normal.

 

[441120]

psi

Just for reference mine drops about 6 psi or about 1/2 vacuum inches.
At idle I have 12" vacuum. Psi should increase with no vacuum, how about boost? Does psi go up with boost?