ok guys simple quetion. Will screwing th eallen in or out raise my fuel pressure on my Holley 670?

 

Screwing it in raises the pressure.

 

THX shifty, I went the wrong way.

 

Hey no problem. The general rule of thumb for adjustbale regulators is every 2.5 turns is one PSI. There are slight vavyences though depending on spring size though. You should always start with the screw flush and go from there.