How many turns=psi increase?

[Adrian87]

I have an AFPR but no guage yet, is it 1 turn clockwise per psi or any set formula on the regulator or do I need to leave it alone until I get a guage? Just installed a set of 57's and a 340 and it's still lean..low 700's..at only 9-10 psi!

 

[FlyinGN]

Have to get a gauge on it. No way to tell fp without..

 

[XLR8]

You NEED a FP gauge. On my regulator a turn of approx 10* - 15* is 1# of fuel pressure.