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To: flyrotary@lancaironline.net
Date: Tue, 20 Dec 2005 16:56:04 -0800
Subject: Re: [FlyRotary] Re: Fuel filter selection
Message-ID: <20051220.165650.3260.11.alwick@juno.com>
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From: al p Wick <alwick@juno.com>

Egg has terrible fuel design. At least one crash so far caused by both
vapor lock and inability of pumps to self prime. 


-al wick
Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland, Oregon
Prop construct, Subaru install, Risk assessment, Glass panel design info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html

On Tue, 20 Dec 2005 18:50:41 -0600 "Bobby J. Hughes" <bhughes@qnsi.net>
writes:
> Buly,
>  
> Try this one. I have purchased it for the high pressure side. 
>
http://store.summitracing.com/default.asp?Ntt=fuel+filter&searchinresults
=false&Ntk=KeywordSearch&DDS=1&N=115&target=egnsearch.asp
>  
> 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
> >
> > .
> > ----- Original Message ----- From: "Buly" 
> <atlasyts@bellsouth.net>
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > 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?
> >>>
> >>> --
> >>>         ,|"|"|,                                    |
> >>> ----===<{{(oQo)}}>===----        Dyke Delta         |
> >>>        o|  d  |o          www.ernest.isa-geek.org  |
> >>>
> >>> --
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> http://mail.lancaironline.net/lists/flyrotary/
> >>
> >>
> >> --
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> >
> >
> > --
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> 
> 
> 
> 
> --
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> 
> 
> 


-al wick
Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland, Oregon
Prop construct, Subaru install, Risk assessment, Glass panel design info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html