Fass fuel filter system

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Fass fuel filter system

December 23, 2021, 08:11:52 pm

I just ordered a TS 165 gal per minute fuel system. I missed the one they had in
stock by one day. I haven't made up my mine where I'm going to put it yet. I could
put in the storage compartment by the Aqua-hot or where the Winns fuel filter is.

Re: Fass fuel filter system

Reply #1 – December 23, 2021, 09:08:08 pm

Quote from: oldguy – December 23, 2021, 08:11:52 pm

I just ordered a TS 165 gal per minute fuel system

Is that a mis-print. OR, are you feeding a GM locomotive diesel???

165 gallons per minute-- DUDE.

Re: Fass fuel filter system

Reply #2 – December 23, 2021, 09:13:37 pm

No that's the one for the M11

Re: Fass fuel filter system

Reply #3 – December 23, 2021, 10:21:03 pm

Did you say 165 gal per hour 😎

Re: Fass fuel filter system

Reply #4 – December 23, 2021, 10:50:37 pm

Yes,165 gal and hour. Now not all the fuel goes to the engine. A lot of the fuel goes
back to the tank all cleaned up.

Re: Fass fuel filter system

Reply #5 – December 24, 2021, 02:00:06 am

Understand there will be two fuel return lines. The original fuel return from the engine and a additional 3/8 line to return fuel line from the FASS with removed air back to the tank. This relieves all vacuum draw issues and prevents any possibility of air being drawn in. I would prefer to see the FASS system as close as possible to the tank. All excess fuel is returned to the tank going thru the ECM chilling plate then routed to the fuel cooler outside of the radiator and returned to the fuel tank.
Scott

Re: Fass fuel filter system

Reply #6 – December 24, 2021, 03:03:48 pm

I believe the return line is 1/2 inch. I will learn more when I go and pick it up.
I talk to the tech at Fass and he said TS165 could suck the fuel around 22 ft.
which is about how far to the Winn filters but the pump pushes a lot better.
If it works I leaning towards putting the Fass system beside the Aqua-hot.

Re: Fass fuel filter system

Reply #7 – December 24, 2021, 03:46:06 pm

Peter, you might want to keep the fuel system over open areas. I can't imagine what would happen if a leak developed in the Fass system in one of the bays. The fuel odor would last a long time not to mention the possibility of dissolving insulation in the floor. If you could make a catch container with an exit under the coach then it would be better.

Re: Fass fuel filter system

Reply #8 – December 24, 2021, 07:19:23 pm

I think the FASS System is overkill, similar using a nuclear hand grenade when a good rock would do.

Re: Fass fuel filter system

Reply #9 – December 24, 2021, 07:55:23 pm

Quote from: TGordon – December 24, 2021, 07:19:23 pm

I think the FASS System is overkill, similar using a nuclear hand grenade when a good rock would do.

So with similar costs I'm still looking for the downside. Any air intrapment will reduce pump performance and this i illuminates any possible air leaks. Time will tell

Re: Fass fuel filter system

Reply #10 – December 24, 2021, 10:38:54 pm

I'm thinking of adding a lift pump, but like crane man I have reservations about pressuring the fuel lines through the bays. I have 5/8 fuel line any pump worth its salt should be able to pull fuel that far. After all the caps pump manages to do it.

Re: Fass fuel filter system

Reply #11 – December 25, 2021, 12:17:05 am

This is why I put out the 2 different places to put the pump. The place by the
Aqua-hot I have to be so careful not to spill any fuel while changing the filters
or anything else that could happen. At least I have a week to think about it.
I appreciate all the feed back.

Re: Fass fuel filter system

Reply #12 – December 25, 2021, 10:24:54 am

Foretravel Tech Talk

Here is a link to the fass install by Don a while back. He used the 95 gallon one and he seems to be happy with it
Johnh
Oops that did not work. Search Fass fuel pump install to see comment
Don's comment.--------
I am buying the FASS UP95 unit from UltraRV products. It costs more than Summit Racing, but the guy who packages the FASS pump modifies the harness that comes with it so that the Cummins ECM doesn't know the Electronic lift pump isn't connected anymore. He claims he has done this for many Cummins CAPS equipped RV's with good results. This method bypasses and plugs the fuel inlet and outlet on the supply side of the OEM lift pump. The OEM electronic lift pump has an integral manifold that takes the unburned return fuel after it cools the CAPS Assy., the engine's ECM, and feeds the injectors. The OEM pump stay's mounted in place on the side of block and the return lines stay as before. He also told me that a not uncommon problem with the CAPS equipped coaches is tha the lift pump seals can develop an internal leak that lets air into the system. The Cummins price on the OEM Electronic lift pumps are more than half the cost of the heavy duty FASS pump and are a royal PITA to install. I regret that I misplaced the one I took out that failed when it started leaking diesel, because I would like to dissect it. I may yet find it in storage somewhere, but not in time to do me any good now... Anyway, I am going to order my pump on Monday, and probably have it by Wednesday. Perhaps between us we can add to the knowledge base on the forum. I intend to document the project as well as I can. I look forward to hearing about your results.
Don

Re: Fass fuel filter system

Reply #13 – December 25, 2021, 11:30:46 am

Thanks John, didn't think about any issues with the ECM something more to think
about. I have a bigger engine than Don and I'm using the filters.

Re: Fass fuel filter system

Reply #14 – December 25, 2021, 04:27:49 pm

Seems prudent to me to put this new pump somewhere where the possibility of a leak or a spill while changing filters would be less of a problem. I wouldn't want any spills of leaks inside of a bay.

What does one of these for the ISM11 cost? Plus fuel lines and installation.

Re: Fass fuel filter system

Reply #15 – December 25, 2021, 06:19:15 pm

$829 Canadian and I think everything is included except an odd fitting and I will
buy 23 ft of 1/2 inch fuel line as they only include 16 ft. Installation is free as I don't
charge for my labour. I am now leaning more to putting in where the Winn filter is.

Re: Fass fuel filter system

Reply #16 – December 25, 2021, 08:48:18 pm

Parker RACOR's take on air in fuel.

https://www.parker.com/literature/Racor/Mobile_Air_Separation_In_Diesel_Fuel.pdf

Re: Fass fuel filter system

Reply #17 – December 28, 2021, 09:00:25 pm

Well I'm getting ready for when the Fass arrives. Yesterday I fished a heavy string
to pull the hose through from the tank to the where the Fass will be install. In the
last picture I have the string tied fill neck. All the pictures is show how the return
line will go into the tank. I welded a piece of 3/8 aluminum plate on the side of the
tank and drilled and tap so I could put on 3/4 pipe elbow and I soldered 1/2 pipe
so the return is above the fuel.

Re: Fass fuel filter system

Reply #18 – December 29, 2021, 12:13:07 am

Nice job 👍.

Re: Fass fuel filter system

Reply #19 – December 30, 2021, 08:25:46 pm

I was lucky, the horizontal door bar just cleared the elbow. Pulled the return hose
in place today. It wasn't easy. It took a hard pull and pushing hoses out of the way.
The way I tied the pull string work well. I tied a big loop so the string would pull the
hose through square and then taped it tight. That worked well and I could really
yard on the heavy string. I would have been a lot easier to put it near the Aqua-hot.

Re: Fass fuel filter system

Reply #20 – January 14, 2022, 08:13:42 pm

Got the system installed and started up the coach today and the engine runs.
I cut a piece of 3/8 x 4 x 8 inches plate and bolted it to the frame so I could mount
the filter system. Then I bolted the system to the plate and it all worked out.
Hopefully Sunday night I will get to see if it makes any difference and the will post
my findings.

Re: Fass fuel filter system

Reply #21 – January 15, 2022, 11:54:49 am

Is there a reason not to Tee into the OEM return line downstream of a check valve? I installed a FASS pump (pump only), but used a Davco 382 as the primary and the OEM engine mounted secondary and so did not have to add an extra return line, but I would have looked at using the the return line post fuel cooler if I had used the FASS filtration. That said, nice bung installation!

Don

Quote from: dsd – December 24, 2021, 02:00:06 am

Understand there will be two fuel return lines. The original fuel return from the engine and a additional 3/8 line to return fuel line from the FASS with removed air back to the tank. This relieves all vacuum draw issues and prevents any possibility of air being drawn in. I would prefer to see the FASS system as close as possible to the tank. All excess fuel is returned to the tank going thru the ECM chilling plate then routed to the fuel cooler outside of the radiator and returned to the fuel tank.
Scott

Re: Fass fuel filter system

Reply #22 – January 15, 2022, 12:09:21 pm

Don the FASS showed the secondary fuel return line separated and actually below the other return. I still dont see why you couldnt combine return lines. The generator and aqua hot also have separate return lines. I want to actually measure the aqua hot return, but suspect it is minimal. Easy access also. All very interesting. IMO slight positive fuel pressure would be better than a vacuum the U320 operates normally with. Looking forward to Peters results. I'm like within the last 7k or so of want to do mods, hopefully will end eventually

Re: Fass fuel filter system

Reply #23 – January 15, 2022, 12:19:39 pm

Fass in there literature said not to tee into the existing return line as it could increase
the return line pressure and cause engine problems. The Fass system returns quite a
bit of fuel to the tank. I can here the fuel going back into the tank.

Re: Fass fuel filter system

Reply #24 – January 15, 2022, 12:32:19 pm

Quote from: oldguy – January 15, 2022, 12:19:39 pm

Fass in there literature said not to tee into the existing return line as it could increase
the return line pressure and cause engine problems. The Fass system returns quite a
bit of fuel to the tank. I can here the fuel going back into the tank.

Wonder if the entire return volume is increased? Would think it would be. Probably not a issue for you but running return threw a cooler would be beneficial to us desert dwellers

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