Right, need a fine thread tap. But which size plug? 1/8" or 3/8"? I forgot when I did mine.

RAM CR 24V's Sig:

06 Ram Cummins

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What is this mod for? Im

dieselgrl4life's Sig:

2006 Dodge Ram 2500 Cummins, Big horn edition, 4" turbo back straight pipe exhaust w/ 6 in tip ,turbo silencer ring MIA, Quadzilla Max Mileage M3, From Holland Court Diesel: Icebox cold air intake, TorqueTube and Intercooler boots, 34" x 11.50 Maxxis Bighorn Mud Tires "Blowing Smoke Gang- Administrator/Scout/Ladies Section President and the Official Model for BSG"

Wow, you're alive after all.

It keeps fuel from returning over relief--the valve will open but no fuel can get out so it'll continue to keep the rail pressurized.

Ok, stupid question. I can see the possible damage that might happen if you cap the rail and it keeps hitting the roof. Something has to give somewhere.

I can understand that if it is capped and it keeps the rail pressurized, you will keep the fuel in the rail compared to draining back through the relief valve when you are in a WOT situation.

But, my truck is basically still stock (2005) except with RokkTech Sensor to advance timing, slightly better airflow (not aftermarket), RokkTech muffler and a somewhat heavy right foot now and then. Would this benefit me since I really don't have a guage to see what my current fuel pressure is when going down the road or even WOT? Would I feel it with my SOPG (seat of pants gauge)?

102,000 miles on truck so I don't really want to blow the thing up but always looking for a better performance mod if possible. Yes, some day I would like to purchase Smarty and all the guages that I currently don't have, but in the mean time. As long as it wouldn't blow it up upon first WOT, should I be fine?

How would I tell if something was starting to go bad due to this mod? Popping noise, damage to injectors, anything like that?

Worse case is take it back out.

Just asking. Thanks. Scott

Nuttymopar's Sig:

Scott
2005 2500, Arson III CP3, Pro-Guard 7 Air Filter, Swiss Cheese airbox with Ram Snorkel, Chromed Torque Tube, Silencer Ring MIA, Tone Ring modified, Pryo, Boost, LED Trans temp gauges, TC Lockup Switch, Rokktech Sensor, Rokktech Muffler, BF Goodrich M/T KM2 on stock chrome rims.

I'm no 3rd Gen guy but I think this mod only benefits those who have upgraded their fuel delivery system to the point where the engine demands exceed the system's factory limits.

Maybe...just guessing here.

Basically this is only needed if you have your rail pressure turned up and have the oppertunity to blow the relief valve. You will see no change if you have not blown the relief valve. It is not capped on my truck, I do not need it capped yet since I have not blown the valve. You can spend the few dollars on this cap, or buy a new relief from Dodge that is around $400 iirc, or get a solid bolt made for around $25 iirc. My choice is to do this, just a personal perference. If you are constantly experiencing high rail pressure and you cap the relief valve it very well could cause something down the way to give up. Note the disclamer at the end of the origional post.

06 DIESEL's Sig:

My rig - 06 Dodge Ram 2500 Crew Long 4x4 SLT CTD 6 speed

A little here, a little there, now it smokes