I'm gathering parts for installing a fuel pressure gauge. I have a mechanical 35 PSI gauge and the tapped banjo is on order. I still need to pick up a shut-off valve from the hardware store.

The question is, do I want a non-adjustable snubber (like Wannadiesel uses) or a needle valve to dampen the pulsations? What are the advantages? What do you use? What else do I need before I start the install?

 

I just put a shut off valve made for pex plumbing. I found in my case it does not pulse at all no matter where the valve is set. My lift pump is wore out. I only see 4 to 4.5 psi. Maybe thats why it does not pulse.

 

I like the needle valve best since I have fuel plumbed directly to the gauge. If the gauge were ever to start leaking (hasn't in over five years) I would be able to simply close the needle valve, which I couldn't do with a snubber.

 

get a oil pressure gauge kit it has 7 feet of copper line and all of the fittings for $7 some gauges have built in snubber just hook it up first and start the motor if it vibrates add the snubber. we run a fleet and have installed probably 50+ of them unless you are running a fass you will like a lower psi gauge we found some sw 16 psi fuel pressure gauges from surplus center for $6 i bought 10 of them i used the last one about six months ago the vp44's run about 16 psi max the cr's run about 7 psi so a 15 psi gives mid scale readings look at northern hydraulics glycerin filled gauges i think they are about $8 this gives the total cost of $15 for kit and gauge

 

Needle valve. Even with a snubber rated for gases I still am getting some bounce once the air works out of the line.

 

The piston pumps must create a pretty wicked pressure wave. Mine has three feet of rubber hose, a needle valve and a snubber. The gauge will not stay steady unless the needle is just barely cracked open.

 

I didn't like the copper line I had for my boost gauge, I would break it or crush it, and it is a pain to try to redo the end. That and it transmitted vibrations into the cab. I have some clear vinyl hose for the fuel pressure, its neat to be able to see whats in the hose and what it is doing.

 

does the line ever turn pink?

 

Sounds like a needle valve is the way to start.

Thanks for all the input.

 

no. Blueish greenish color now, but I thought about seeing how much marvel mystery oil or atf it would take make it pink, then I would know the next time someone says that on here .... but I dont really want that crap in my pump.

 

i know one gallon of ruby fieldmaster will dilute 30 gallons of highway.