Capping A Fuel Rail - Page 2 - Diesel Bombers



Dodge Diesel Tech Articles All Years of Cummins Tech Talk

 
 
 
 
LinkBack Thread Tools Search this Thread
  #11  
Old 08-16-2008, 08:07 PM
dalton06's Avatar
Diesel Enthusiast
 
Join Date: Oct 2007
Location: Canton, GA
Posts: 489
Default

where do I get the "real cap" ? Complicated or easy to do like this?
  #12  
Old 08-17-2008, 12:25 AM
Red_Rattler's Avatar
High Tech Redneck

 
Join Date: Nov 2007
Location: Columbus WI
Posts: 6,730
Default

Or you could just get the dual fuel line kit.....
  #13  
Old 08-17-2008, 02:25 PM
Diesel Fan
 
Join Date: Mar 2007
Posts: 27
Default

Floor It sells the cap that takes the place of the relief valve fitting. very nice piece. the dual feed line kit doesn't really do much for performance, but it will act to cap the rail.
  #14  
Old 09-10-2008, 02:53 PM
skynyrd's Avatar
Diesel Enthusiast
 
Join Date: Mar 2007
Location: harewood, md
Posts: 266
Default

Got her plugged. Just so everyone knows, need a 3/8 FT(24 tpi) tap and 3/8 24tpi set screw.
The Following 2 Users Say Thank You to skynyrd For This Useful Post:
  #15  
Old 09-10-2008, 03:15 PM
wildbill's Avatar
BOMBARDIER

 
Join Date: Jul 2007
Location: Baker, MT
Posts: 12,808
Default

Appreciate the re-loc!!!
  #16  
Old 11-06-2008, 10:30 PM
wildbill's Avatar
BOMBARDIER

 
Join Date: Jul 2007
Location: Baker, MT
Posts: 12,808
Default

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

Last edited by wildbill; 11-06-2008 at 10:32 PM.
  #17  
Old 11-09-2008, 10:51 PM
dieselgrl4life's Avatar
Cowgirl with a Cummins
 
Join Date: Jan 2008
Location: Rio Oso ca
Posts: 284
Default

What is this mod for? Im
  #18  
Old 11-19-2008, 07:28 PM
Mr. Miyagi's Avatar
Diesel Bomber
 
Join Date: Mar 2007
Location: Olympic Peninsula
Posts: 2,564
Default

Quote:
Originally Posted by dieselgrl4life View Post
What is this mod for? Im
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.
  #19  
Old 11-25-2008, 10:49 AM
Diesel Fan
 
Join Date: Mar 2007
Location: VT
Posts: 23
Default

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
  #20  
Old 11-25-2008, 02:27 PM
Mr. Miyagi's Avatar
Diesel Bomber
 
Join Date: Mar 2007
Location: Olympic Peninsula
Posts: 2,564
Default

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.
 
 
 

LinkBacks (?)
LinkBack to this Thread: https://www.dieselbombers.com/dodge-diesel-tech-articles/14573-capping-fuel-rail.html
Posted By For Type Date
rail cap vs. dual feed line - Page 2 - Competition Diesel.Com - Bringing The BEST Together This thread Refback 04-03-2009 10:50 PM
Hard Starting. - TDR Roundtable This thread Refback 10-05-2008 09:18 PM

Related Topics
Thread Thread Starter Forum Replies Last Post
Help please ? 6.5 td lift pump problems Dbleo351 Chevy/GMC 6.2L and 6.5L 19 11-20-2016 10:34 AM
Installation of an AirDog or Fass Fuel system part 1 Jet A Fuel Tech Article Submission 0 06-05-2015 04:28 PM
Rough start after oil change. ctjkelley Chevy/GMC 6.2L and 6.5L 7 06-03-2015 07:01 AM
PO1218 and slight miss moneypitk5 Chevy/GMC 6.2L and 6.5L 3 02-12-2015 12:01 PM
p7100 stuck fuel rail cfarley0210 12 Valve 2nd Gen Dodge Cummins 94-98 2 01-19-2015 07:00 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 04:43 PM.