Help with FASS Installation

[Wagtail]

I am seriously looking into a FASS fuel pump installation in my '03 Holiday Rambler Scepter, with ISC 350hp and need some assistance. To begin with would anyone who has already made the conversion have the dimensions of their Titanium 95G pump and filters (height, width and depth). The location where I want to install mine is limited and I want to make sure I can fit it there.

Secondly, the attached picture is looking inward on my fuel tank and all but two lines disappear into a black hole. Can anyone help me identify where the lines marked as ??? go?

Thanks in advance.

-Jamie

[Alpine36]

A reasonable space requirement for the FASS would be about 16" high/wide and 8" deep. I believe FASS has physical dimensions on their web site. My best guess on your fuel lines is ??? Left is engine supply line, ??? Right is engine return line and ??? Center is generator return line.
Note: engine fuel return line will usually be smaller in diameter than the fuel supply line.

[shootist]

On the sizing remember the filter has to drop down enough to clear the pickup tube. If you take your lift pump lines off the fuel return line is independent on the engine side of the pump . It remains in service but will not handle the full flow of the fass. So if you mount in the rear another return from the pump has to be run to the tank. Many of us have used the vent. Also in the ecm cooler relay make sure you use one with a flyback diode to protect the ecm. Napa had the wiring plug so I didn't cut the lift pump harness. I will look for the part numbers.

[shootist]

I think this is it, double check me by looking at the one on your coach.

[jacwjames]

My tank connections are different but you need to find the supply and return lines for the fuel.

The supply line will have a pickup tube on the bottom, remove one of the larger hoses and then remove the fitting going into the bung hole. If there is a pickup tube that's the supply line.

If there is not a pick up tube it will be the return. You can verify it is the return hose by going to your primary filter and removing the in hose, I blew through mine and it spit out fuel on the other end at the tank, I had a large pan to catch the fuel.

[Timaz]

There are are few different threads on here about installing a FASS system on their motorhomes with a lot of great information. So I would suggest searching them out.
Tim

[oldguy70]

When I put my Fass System in I welded a piece of !/4 aluminum that I already drilled
and tapped for the return line as the Fass System needs it's own return.

[Wagtail]

Thanks for all the replies on this. I did find a thread that talked about which line is which. I have the same tank layout as this picture and will check the return lines (looking for lack of pick up tubes) to verify accuracy.

1 - Return from CAPS pump
2 - Return from generator
3 - Supply to generator
4 - Supply to Lift pump
VENT - Vent for main tank

I do still need some measurements for the FASS. Perhaps I should be asking about a 100 gph pump/filter (Titanium Signature) with the new (shorter) filters. I appreciate the 16" x 16" x 8" guesstimate but if anyone can measure their pump and filter system I still need that before I commit to ordering my FASS. My chosen location is very tight.
-Jamie

[jacwjames]

Keep in mind that one of the filters locations has a long tube that goes into the filter. There has to be allowance to be able to change the filter, my "guess" is ~4".

I was able to mount my FASS up front above the propane tank but had to modify a shelf that goes across the top of the propane tank. I this area for storage and did not want to loose. So I cut a portion of the shelf out directly below the filters so I can drop them down to change. The only disadvantage is i can't use the longer filters that are available but I don't see that as a problem.


I had considered trying to mount it over my fuel tank but I did not have enough room to comfortably change the filters.



So you will have to allow for the additional space. If you are determined to install the FASS system I'd suggest to order it.

[bubby124]

Here's some photos of my install on my 02 windsor with measurements. It has the short filters on now but the longer ones fit just barely. I installed a dedicated return line

[Wagtail]

Thanks again everyone who responded. I will be ordering my FASS today.
-Jamie

[bubby124]

You won't regret it

[Timaz]

Because of the lack of room in my motorhome I installed mine FASS pump in the back with the engine. My pump holds 16-19 psi to the injection pump. FASS even has a motorhome install video putting one in the engine compartment. You will just have to buy a long piece of return line.

Tim

[tmw188]

This is on the drivers side of my ‘02 Windsor, with room for the larger filter if desired. I did not use the bracketry FASS supplied. As Jacwjames stated I too followed the way Mike did his in the video. Attachment 382221