Do these pressure relief value only go south on big horsepower trucks?

 

Did I mess-up big time posting a add from someone that's not a sponsor, sorry, I'd like to apology to all the sponsor's, sorry.

 

that PRV from Dr Performance is a Block Off. (Rail Cap)

 

What Doug said above, that is precisely what you want to avoid. Oh and no you did nothing wrong

 

I wish someone made a quality valve that didn't wear out so fast. Imagine if wastegates failed as quick as these valves do. Air and Fuel are two different things especially when talking about these extreme rail pressures. But how wonderful if you could get a valve meant to open 1000's and 1000's of times before ever wearing out and be tuneable like a wastegate. What a solution to our problem. Set it at your max desirable rail pressure and forget it. Then just keep your cruising RP below 20K and your injectors would love you.

 

i agree suposedly we can put men on the moon but nobody can build a reliable rpv.

 

Its Friday afternoon and this weeks count of cracked injector bodies stands at 8. Thats 8 sets with one cracked injector each this time. Counting downtime, lost revenue, repair costs, etc you have quite a bit of cash there.

 

What if one has a dual feed line, shouldn't the pressure backfeed a little and spare the injectors?

 

i have dual feed line and i can say when i lift the truck surges and i think its because the pressure is feeding back down but i am not for sure. where exactly is the relief valve on the rail? is it uder where that line feeds back to the fuel canister? If so i migth be in trouble as that line split and cracked open so we took it off and blocked the hole and now there is no line going back towards the fuel canister.

 

It's right next to the pressure sensor.

And I'm glad I don't have to worry about such a high relief. You guys and your dual pumps and large injectors. Hope you like wasting all you money.

 

This is some good advice it sounds like

 

Well Don, I'm glad you said something, as i was just about to get one for mine. Thanks, I think I'll just replace my relief valve with a new one.

 

Hope everyone who disagreed with me about the wisdom of rail caps takes note of this.

 

We are only talking about rail caps(in place of the PRV) aren't we, not dual feed lines??? I can see capping a rail being a bad idea, but dual lines can at least back flow right? I'm asking the same thing again here as above.

 

Since dual feed lines that use the PRV port on the rail eliminate the PRV by design, the high-pressure side of the system still has no relief - and I wouldn't rely on diesel's compressibility to cushion pressure spikes from hurting the injector solenoids or tips.

Back flow to where?... it's still the same circuit.