On Dec 20, 2005, at 7:50 PM, Bobby J. Hughes wrote:
Buly,
Cost-effective filtering for your engine.
These Aeromotive fuel filters feature an advanced flow-through design, to allow steady fuel flow with less than a .15 psi pressure drop. Designed for carbureted or fuel-injected engines from 200 to 1,000 hp, they're made from 6061-T651 aluminum alloy and have a 10-micron filtering element for reliable protection.
Not sure about the cost effective part.
I am also planning to use the same filters as Ed A and Egg subi package. . on the low pressure side. I will check pressure loss during testing and make a final decision based on head pressure, wing dihedral and pressure loss etc.
Those filter bags that Al is mentioned look good as well but I am not sure I could retrofit them into my RV10 tanks. I figure within the next year their should be another 100 or so Egg's in the air so that is a pretty good test group.
Bobby
________________________________
From: Rotary motors in aircraft on behalf of Buly
Sent: Tue 12/20/2005 11:30 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel filter selection
Hi Ed,
The cars take fuel an inch or so up from the bottom and avoid most of
the sediment. I have cut gas open tanks and you'll be surprised
what's left inside after few years. At least on my plane the fuel is
drained at the tank's lowest point, and I would like to have any
sediment or water to come out and be trapped in the filter/water
separator, instead of accumulating on the screen inside the tank.
I'm nervous about installing high pressure filters in the gas lines,
but that's my opinion. Just another 2 connectors that can fail? One
day If I'm proven wrong, maybe I'll install one too :)
Buly
On Dec 20, 2005, at 12:10 PM, Ed Anderson wrote:
Buly, I'm not that knowledgeable about pumps or filters. But, I
notice that on the automobiles there is generally a "coarse"
filters on the inlets of the pumps in the fuel tanks and "fine"
High Pressure filters after the pumps, but before the injectors.
Obviously, you have experience that indicates problems with that
combination - yet, wonder why we see it in the automobile?
Ed A
.
Sent: Tuesday, December 20, 2005 10:24 AM
Subject: [FlyRotary] Re: Fuel filter selection
Guys, I don't understand why you are installing filters AFTER the
pumps? I sell large SEPAR diesel fuel filters and I always
recommend all the filtering to be done before the pumps and out
of the tanks.
Any water or debris if it's allowed to reach the pumps, will be
beaten into smaller particles and may be PUSHED thru the filter,
or even will damage the pumps.
I personally suffered on my boat by frequent engine stopages in
the worst of times, only to discover that the manufacturer have
installed a screen on the pick up tube inside of the tank, where
can not be seen or cleaned.
The same manufacturer had to fix or replace number of engines only
because he installed the fuel pumps BEFORE the filter. Any water
in the fuel was beaten in to fine emulsion and pushed thru the
filter into the injectors. Results were rusted injectors, rusted
high pressure pumps and more.
Buly
Kelly Troyer wrote:
Ernest,
My opinion also !! There is a potential 90 psi surge
pressure from
healthy EFI pumps........I do not believe any of the cheap glass
filters
are rated that high !!
I love this list. I had not thought to check the pressure
rating. I just assumed that a filter could take the pressure.
It's not like 90PSI is difficult to design for. But after Mark
suggested it, I went looking. Sho' 'nuff, no rating.
Any of you carbeurated guys want a pretty glass filter for 3/8"
hose lines?
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