LIFT PUMPS
10-31-2003, 06:41 PM
#2
Administrator
Re:LIFT PUMPS
The FASS system looks to be the best bet yet.
New pump, back by the tank where it belongs.
New filter/water seperator assembly.
New lines from tank to injection pump.
Pretty much replaces everything that made the OEM system the jewel that it is.
It hasn't been out that long so there aren't long term tests yet.
Do a search for FASS or F.A.S.S on here or other Diesel boards and you'll find out just about everything.
phox
New pump, back by the tank where it belongs.
New filter/water seperator assembly.
New lines from tank to injection pump.
Pretty much replaces everything that made the OEM system the jewel that it is.
It hasn't been out that long so there aren't long term tests yet.
Do a search for FASS or F.A.S.S on here or other Diesel boards and you'll find out just about everything.
phox
10-31-2003, 08:01 PM
#3
Top's Younger Twin
Re:LIFT PUMPS
I feel that the biggest culprit to premature pump failure is the many changes in the inner diameters the fuel must be drawn thru and pushed thru.
Add some fueling and this multiplies the issues and adds more
stress and turbulence/restriction at areas like the banjo bolts.
The theory of having the pump near the tank is also another debate as I tried that and had failures there too. This was with the stock fuel lines and banjo bolts in place. Changeing the lines may be a different story.
Whatever you do...stay clear of a dual pump set up unless it has an auto bypass if one fails.
We've had many stock lifts and after market pumps racking up over 30K miles...one over 50K was mine with different less restrictive lines.
To each his own...however, the system that comes on the trucks from the factory is barely acceptable.
Your caps infers you are yelling. ;D
Add some fueling and this multiplies the issues and adds more
stress and turbulence/restriction at areas like the banjo bolts.
The theory of having the pump near the tank is also another debate as I tried that and had failures there too. This was with the stock fuel lines and banjo bolts in place. Changeing the lines may be a different story.
Whatever you do...stay clear of a dual pump set up unless it has an auto bypass if one fails.
We've had many stock lifts and after market pumps racking up over 30K miles...one over 50K was mine with different less restrictive lines.
To each his own...however, the system that comes on the trucks from the factory is barely acceptable.
Your caps infers you are yelling. ;D
11-01-2003, 10:52 AM
#4
Banned
Thread Starter
Join Date: Oct 2003
Location: HELENA,GA
Posts: 57
Likes: 0
Received 0 Likes
on
0 Posts
Re:LIFT PUMPS
SORRY, I JUST TYPE IN ALL CAPS, IT'S EASIER FOR ME. I HAD A CUMMINS TECH TELL ME ONE TIME THAT THEY(CUMMINS) RECOMMENDED PUTTING JUST A EL CHEAPO INLINE FUEL FILTER BEFORE THE LIFT PUMP.HE SAID THE PUMP FAILURES WERE COMING FROM TRASH IN THE FUEL. DOES ANYONE KNOW OF THIS? IF THIS WOULD WORK, WHY COULDN'T YOU JUST PUT A 25 DOLLAR INLINE PUMP THAT WOULD DEFINETLY PUT ENOUGH FUEL UP TO THE VP44? IS THIS A POSSIBILITY? WHY HASN'T SOMEONE JUST MADE THIS STOCK PUMP BETTER & A LITTLE STRONGER?
11-01-2003, 07:53 PM
#5
Registered User
Join Date: Mar 2002
Location: Drive till ya hit a Polar Bear, then go back 50 miles
Posts: 1,062
Likes: 0
Received 0 Likes
on
0 Posts
Re:LIFT PUMPS
[quote author=CAPTDASH link=board=4;threadid=21768;start=0#msg204357 date=1067705561]
A CUMMINS TECH TELL ME ONE TIME THAT THEY(CUMMINS) RECOMMENDED PUTTING JUST A EL CHEAPO INLINE FUEL FILTER BEFORE THE LIFT PUMP.HE SAID THE PUMP FAILURES WERE COMING FROM TRASH IN THE FUEL.[/quote]
Nooooooooo. Cummins has _never_ recommended a pre-filter on the lift pump, and from the 40 or so pumps that we've looked at, trash has absolutely nothing to do with it.
If you do a snoop on the board, you'll probably find a couple of my fuel system rants on here that will give you additional reading material, however the gist of it is this:
80% - 85% of all lift pump failures come from the internal bypass valve being beaten up badly. This is not due to Carter workmanship (the Carter pump is a great little pump), but to Cummins not following manufacturers guidelines on proper line sizing. The Carter lift wants a minimum of -6 lines coming in AND going out. We've almost got -6 coming in, however leaving the pump is a line that is barely 1/8" in diameter. Due to the excessive restriction of this line, the internal bypass ends up working about 4 times more than it was designed to work, and ends up failing prematurely. Simply replace the lines between the lift pump and VP44 to -8 (if you're over 320 HP that is. Under 320, simply open up the bolts to high flows. Over 400, then the Carter becomes a little suspect in its abilities). Don't relocate the pump either. Its just fine in its stock location.
Rod
A CUMMINS TECH TELL ME ONE TIME THAT THEY(CUMMINS) RECOMMENDED PUTTING JUST A EL CHEAPO INLINE FUEL FILTER BEFORE THE LIFT PUMP.HE SAID THE PUMP FAILURES WERE COMING FROM TRASH IN THE FUEL.[/quote]
Nooooooooo. Cummins has _never_ recommended a pre-filter on the lift pump, and from the 40 or so pumps that we've looked at, trash has absolutely nothing to do with it.
If you do a snoop on the board, you'll probably find a couple of my fuel system rants on here that will give you additional reading material, however the gist of it is this:
80% - 85% of all lift pump failures come from the internal bypass valve being beaten up badly. This is not due to Carter workmanship (the Carter pump is a great little pump), but to Cummins not following manufacturers guidelines on proper line sizing. The Carter lift wants a minimum of -6 lines coming in AND going out. We've almost got -6 coming in, however leaving the pump is a line that is barely 1/8" in diameter. Due to the excessive restriction of this line, the internal bypass ends up working about 4 times more than it was designed to work, and ends up failing prematurely. Simply replace the lines between the lift pump and VP44 to -8 (if you're over 320 HP that is. Under 320, simply open up the bolts to high flows. Over 400, then the Carter becomes a little suspect in its abilities). Don't relocate the pump either. Its just fine in its stock location.
Rod
11-01-2003, 08:58 PM
#6
Registered User
Re:LIFT PUMPS
Hey rod I think will take your advise on changeing out my lines to your maximum fuel upgrade. Hope I can get Stephn to do it for me while I'am up getting my trany done by Bill & my ddII's put in. Bye the way did you get my Scotty II sent out yet? Glenn France/ tanker yanker
11-02-2003, 11:45 AM
#7
Registered User
Join Date: Jun 2003
Location: Texas
Posts: 1,015
Likes: 0
Received 0 Likes
on
0 Posts
Re:LIFT PUMPS
Hey Push Rod if I have only added 65hp to my truck what can I do to my fuel lines to help out my lift Pump. And other than putting a fuel pressure gauge on the pump, are there any ways of testing the lift pump to see if it is working correctly. I drain my fuel/water at least once a week and I always bump my lift pump on to refill it so I know that it is working in this matter.
Trending Topics
11-03-2003, 10:34 AM
#8
Registered User
Join Date: Sep 2001
Location: Sweeny, Texas
Posts: 772
Likes: 0
Received 0 Likes
on
0 Posts
Re:LIFT PUMPS
[quote author=Push Rod link=board=4;threadid=21768;start=0#msg204455 date=1067737986]
Under 320, simply open up the bolts to high flows
[/quote]
so i assume the "bolts" are banjo bolts? and this should help reduce risk of pump failure?
Under 320, simply open up the bolts to high flows
[/quote]
so i assume the "bolts" are banjo bolts? and this should help reduce risk of pump failure?
11-03-2003, 12:02 PM
#9
Registered User
Join Date: Oct 2003
Location: La.
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Re:LIFT PUMPS
[quote author=Palmetto_kid link=board=4;threadid=21768;start=0#msg204987 date=1067877255]
[quote author=Push Rod link=board=4;threadid=21768;start=0#msg204455 date=1067737986]
Under 320, simply open up the bolts to high flows
[/quote]
so i assume the "bolts" are banjo bolts? and this should help reduce risk of pump failure?
[/quote]
Could somebody discribe this process in a little more detail so my understanding will be clear. how do you open bolts to high flow? How do you know thay are fiull open? Thanks
[quote author=Push Rod link=board=4;threadid=21768;start=0#msg204455 date=1067737986]
Under 320, simply open up the bolts to high flows
[/quote]
so i assume the "bolts" are banjo bolts? and this should help reduce risk of pump failure?
[/quote]
Could somebody discribe this process in a little more detail so my understanding will be clear. how do you open bolts to high flow? How do you know thay are fiull open? Thanks
Thread
Thread Starter
Forum
Replies
Last Post
