flyrotary@lancaironline.net Mailing List Archive

Ed,

You stated that you use Facet pumps, I suppose these are before the in-line filter. My concern about using the filters before the efi fuel pump is that there would be more flow restriction. Since I will be using gravity fed sump tank (5-6 inch elevation difference and I don't want to pressurize the sump tank), that vaporization could occur; hence I am still thinking of a large surface screen in the sump tank (already have screen wire over the strake tank outlets) to catch small stuff that could shorten pump life, not necessarily plug up the pump. MSD claims to be able to handle small particles better than the competition. Thinking also of putting in a sight glass (Plexiglas) to observe tank behavior and screen condition. Can Plexiglas hold up to auto gas?
Oh yes, the sump tank will have a water catch sub-sump.

Wendell (hope I'm making sense)

I have opened up my coarse filter 6 times in 10 years. First time had some small fragments of sealant used to close the tank. The next 5 times nothing. Of course, a lot will depend on type of tank and quality of fuel going into the tanks.

I replace the EFI filters at each conditional inspection, cut the old ones open and have never found anything in them either. But, I do use 100LL aircraft quality gasoline - almost exclusively..

ED

----- Original Message -----

From: Wendell Voto

To: Rotary motors in aircraft

Sent: Sunday, September 09, 2007 4:00 PM

Subject: [FlyRotary] Re: need help

Thanks Ed,

How often do you have to clean the filter?

Wendell

I have a fine wire mesh filter in an aluminum housing with An-6 fittings on each end just before the fuel enters my header tank.. You can unscrew one end to clean the mesh. However, been too long ago and I find I never logged the part number on my fuel data sheet.

But, here are the specific part numbers I use for the EFI filters

Fuel Filters: OEM Auto Fuel Injector Fuel Filters (Two in Parallel)

Type: AC GF - 481 Pkg: 25056052 OEM:25055129 (or equivalent)

Fittings: 3/8 Saginaw to AN6 Adapter, "O" ring required

Ed

----- Original Message -----

From: Wendell Voto

To: Rotary motors in aircraft

Sent: Saturday, September 08, 2007 10:18 PM

Subject: [FlyRotary] Re: need help

Thanks Rob and Ed for the replys on the MSD fuel pumps.

Now; what kind of filter do you have ahead of the pump? I'm thinking of using some fine mesh screen to make a filter inside the sump tank. It will be hard to service but believe that one will prolong pump life and possibly. stop a particle that could interupt fuel flow. What size mesh is recommended?

Wendell

I have been using the MSD 2225 for about 20 hour with no problem so far. Plenty of fuel pressure. Only problem is that it is not threaded so I had to use the barbed nipples that come with the pump. How bad can that be?

Robert Bollinger
FM1099 MUM
Fairfield IA 52557
(641)472-7000 ex2068
(641)919-3213 cell
rob@mum.edu