Pressure regulator bad????

[younggun2.0]

I have a rear mounted electric holley blue pump. I have a inline filter before the pump and a canister filter after the pump and then 6AN braided line all the way up to the carb. i have a plate that mounts a single inlet duel outlet pressure regulator. it splits off from the regulator to each float bowl of my holley 750 dp. i have pressure gauges in both the front and rear fittings of the regulator manifold. i have 6lbs in the front portion and only 4lbs in the rear. they should be equal shouldnt they? i ordered a new billet alum holley regulator today and 2 new pressure gauges. hope that fixes the prob. i got the current regulator in a kit from summit and it looks pretty cheap.

 

[67Dart273]

Assuming you have it plumbed correctly, this has to differences in the gauges. Either or both gauges could be wrong, IE one could be reading 1 lb too high, and the other 1 lb too low

Also, leaving a gauge(s) inline is terribly hard on them, unless they have a protective orifice or are oil filled. If the needles vibrate when the needles are opening, they won't be accurate for long.

I like to use refrigeration Schrader valves. You can buy these in all kinds of configurations, but for fuel systems, you can get them with 1/4" flare and a Schrader valve and cap, and the other end in 1/8" male NPT. In fact what I use for checking my (now EFI) pressure is an old refrigeration manifold and hoses, with the "high" side gauge replaced.

Like so:

My 5 buck thrift store refrigeration manifold, with a 0-30 psi gauge on the left. (For TBI) I'll have to replace it when/ if I go to MPFI. The nice thing about using one of these is you can check pressure, shut things off, and use the hoses to bleed off pressure so you don't spray all over

 

[younggun2.0]

Assuming you have it plumbed correctly, this has to differences in the gauges. Either or both gauges could be wrong, IE one cold be reading 1 lb too high, and the other 1 lb too low

it can only be plumed one way. it has a bottom fed inlet and two side mounted oulets. i think it could be the gauges also. either way i ordered new stuff. i just need to find out if its bad. if so then i will pitch it. if its good then i will hang onto it.

 

[crackedback]

swap gauges and check results.