1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

more fuel at WOT

Thread Tools
 
Search this Thread
 
  #21  
Old 10-20-2009, 08:36 AM
1stgenjunkie's Avatar
Diesel Enthusiast
Join Date: Oct 2009
Location: Southern,IN
Posts: 163
Received 2 Likes on 2 Posts
Default

Just go to a local cummins dealer and get part#3914284 for the spacer and go to like autozone or advance auto parts and get a fuel pump gasket for a small block chevy, for the extra gasket ull need. as far as the fuel line goes just take ur pump w. you to the hardware and use brass fittings be alot cheaper than the oem cummins line, thats what I did.
 
  #22  
Old 10-20-2009, 02:34 PM
DieselPerformanceGuy's Avatar
Diesel Enthusiast
Join Date: Mar 2009
Location: eastern wyoming
Posts: 301
Received 2 Likes on 2 Posts
Default

alright thanks and the fuel line from the tank to the fuel line should still work right.
 
  #23  
Old 10-21-2009, 07:33 AM
1stgenjunkie's Avatar
Diesel Enthusiast
Join Date: Oct 2009
Location: Southern,IN
Posts: 163
Received 2 Likes on 2 Posts
Default

I would do away with any oh the stock lines, run atleast 3/8 fuel hose from the tank to lift pump. If your going to do any mods to it at all you need all the fuel you can get.
 
  #24  
Old 10-21-2009, 09:25 AM
DieselPerformanceGuy's Avatar
Diesel Enthusiast
Join Date: Mar 2009
Location: eastern wyoming
Posts: 301
Received 2 Likes on 2 Posts
Default

alright sounds good, thanks
 
  #25  
Old 10-23-2009, 09:35 AM
cumminscraz's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Posts: 11
Received 0 Likes on 0 Posts
Default

When you tap into the piston lp do you remove the large brass nuts on the inlet and outlet and get a fitting to match those threads or do you go into the smaller oem holes?
Regardless, what are the threads of the inlet and outlet. My pump is on the truck so it is difficult to measure.
Thanks guys,
Mark
 
  #26  
Old 10-23-2009, 11:45 AM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

With the kind of fuel you need, I wouldn't even dream of using the stock filter, or anything that screws onto the same spud for that matter. The stock mount is a restriction in itself at your level. Unless you're going to pull the manifold off and machine out those fuel passages in there, you need something like this:

http://stuff.is-a-geek.net/PhotoAlbu...cs/CTD_123.jpg
 
The following users liked this post:
cumminscraz (10-23-2009)
  #27  
Old 10-23-2009, 12:00 PM
cumminscraz's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Posts: 11
Received 0 Likes on 0 Posts
Default

Now we're talking. I've just tried a filter off a second gen. but still doesn't do the job even with a flow rate of 60 gph. I was thinking about a filter housing from perma-cool
and a fleetguard filter FS1212 flowing 90 gph. NadirPoint, you've got a lot of fuel lines there. What's your routing of all these lines?
 

Last edited by cumminscraz; 10-23-2009 at 12:08 PM.
  #28  
Old 10-23-2009, 12:19 PM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

That's just the front portion. I have a fully redundant, high-efficiency, high volume fuel supply system with two tanks, two pumps, pre/primary filters, manually selectable for both supply and return:

http://stuff.is-a-geek.net/PhotoAlbu...cs/CTD_184.jpg
 
  #29  
Old 10-23-2009, 12:39 PM
cumminscraz's Avatar
Diesel Fan
Thread Starter
Join Date: Sep 2009
Posts: 11
Received 0 Likes on 0 Posts
Default

I was thinking of putting a drawstraw from Vulcan, 1/2" supply to the low pressure piston lift pump, 1/2" line to a 20 micron,90gph remote fuel filter,then directly into the VE pump with 1/2". That will bypass all banjo bolts. I've got to know the best way to tap into the lift pump. Can you remove the large brass inlet and outlet nuts in order to get a larger fitting on?
 
  #30  
Old 10-23-2009, 12:43 PM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

I would stay with a minimum nominal 10um filter, unless you plan on replacing the VE and injectors on a regular basis. That's the stock filter rating and is a minimum standard for this type service IMHO. The primary shown in my first pic above is rated at 5um and flows plenty good for me. My fueling is stock with a couple turns on the fuel screw, but the post filter pressure never drops at all.
 
The following users liked this post:
cumminscraz (10-23-2009)


Quick Reply: more fuel at WOT



All times are GMT -5. The time now is 02:56 AM.