X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.142] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 618324 for flyrotary@lancaironline.net; Thu, 28 Jul 2005 17:06:05 -0400 Received-SPF: none receiver=logan.com; client-ip=129.116.87.142; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C593B8.0FEC8FF2" Subject: RE: [FlyRotary] Re: fuel filter question Date: Thu, 28 Jul 2005 16:05:20 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E016C1C09@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: fuel filter question Thread-Index: AcWTtBVgS9GWC4ykQ+iJ8HRzZ9KmjQAA8ilg From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C593B8.0FEC8FF2 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Well, maybe that's worth noting... "If you put the filter before the pump, then use filters with oversized inlets/outlets." =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing Resort (Georges Boucher) Sent: Thursday, July 28, 2005 3:36 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filter question =20 II have an old Eagle Medallion that my maintenance crew uses around the resort it has the filter before the pump. One thing that I did notice was that filters before the pump have large inlets 13 or 14mm, both the filter & the pumps are very close to the tanks (pumps push better than they suck) Georges B. -------Original Message------- =20 From: Mark R Steitle =20 Date: 07/28/05 13:22:57 To: Rotary motors in aircraft =20 Subject: [FlyRotary] Re: fuel filter question =20 I guess I'll have to take your word on that one George. I haven't seen a Renault in Texas in quite a while. =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing Resort (Georges Boucher) Sent: Thursday, July 28, 2005 3:13 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filter question =20 Renault has the filter before the pump. Georges B.=20 =20 -------Original Message------- =20 From: Mark R Steitle =20 Date: 07/28/05 12:59:38 To: Rotary motors in aircraft =20 Subject: [FlyRotary] Re: fuel filter question =20 A little more searching and I found a schematic of a Peugeot on the Bosch web site. Both diagrams show the tank, then the pump, then the filter. Not that some others don't do it differently, but I haven't seen any. I think there is a good reason the designers put the filter downstream from the pump. As Tracy has pointed out before, efi pumps don't suck very well, they are designed to push fuel at high pressure. My system has coarse screen filters in the tank, and two efi filters downstream from the pumps. Caveat... I have done 9 hours of ground testing, but no flight test as yet. Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark R Steitle Sent: Thursday, July 28, 2005 2:47 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filter question =20 Did a Google search on "VW Jetta fuel system". Here is a cut-n-paste from the very first hit. =20 1985 Volkswagen Jetta NHTSA Recall ID Number: 87V053000 Recall Date: APR 14, 1987=20 Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP=20 Potential Units Affected: 278520=20 Summary: FUEL PUMP, LOCATED INSIDE FUEL TANK, COULD SEIZE DURING HIGH AMBIENT TEMPERATURES BECAUSE OF AN EXTREME FINE MESH FUEL FILTER RESTRICTING THE FUEL FLOW.=20 Consequence: FUEL SUPPLY TO ENGINE WOULD BE PARTIALLY INTERRUPTED,RESULTING IN STALLING.=20 Remedy: INSTALL A MODIFIED FUEL PUMP AND FILTER.=20 Notes: VOLKSWAGEN OF AMERICA,INC,=20 =20 =20 Mark S. =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of jesse farr Sent: Thursday, July 28, 2005 2:42 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filter question =20 Isn't the reason for that most efi cars have pump in tank so would be kind of hard to do ? jofarr, soddy tn ----- Original Message ----- From: Mark R Steitle =20 ,=20 As I recall, putting the filter between the tank and pump was true for the pre EFI cars, which were prone to vapor locking. But I can't think of any of the newer EFI cars that put the filter before the pump (excluding screen filters). Can you provide any examples? =20 =20 =20 =20 =20 =20 =20 =20 =20 =20 ------_=_NextPart_001_01C593B8.0FEC8FF2 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Well, maybe that’s worth = noting… “If you put the filter before the pump, then use filters with = oversized inlets/outlets.”   

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing = Resort (Georges Boucher)
Sent: Thursday, July 28, = 2005 3:36 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = fuel filter question

 

II = have an old Eagle Medallion that my maintenance crew uses around the resort it has the filter before the pump. One thing that I did = notice was that filters before the pump have large inlets 13 or 14mm, both = the filter & the pumps are very close to the tanks (pumps push better = than they suck)

 Georges = B.

-------Ori= ginal Message-------

 

Date: 07/28/05 = 13:22:57

Subject: = [FlyRotary] Re: fuel filter question

 

I guess I’ll have to take = your word on that one George.  I haven’t seen a Renault in = Texas in = quite a while. 

 =

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing Resort (Georges Boucher)
Sent: Thursday, July = 28, 2005 3:13 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Re: fuel filter question

 

=

Renault has the filter before the pump.

Georges = B. 

 

-------Original = Message-------

 

Date: 07/28/05 12:59:38

Subject: [FlyRotary] Re: fuel filter = question

 

A little = more searching and I found a schematic of a Peugeot on the Bosch web = site.  Both diagrams show the tank, then the pump, then the filter.  = Not that some others don’t do it differently, but I haven’t seen = any.  I think there is a good reason the designers put the filter = downstream from the pump.  As Tracy has pointed out before, efi pumps don’t suck very well, they = are designed to push fuel at high pressure.  My system has coarse = screen filters in the tank, and two efi filters downstream from the = pumps.  Caveat… I have done 9 hours of ground testing, but no flight = test as yet.

Mark = S.

 =

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark R Steitle
Sent: Thursday, July = 28, 2005 2:47 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Re: fuel filter question

 =

Did a Google = search on “VW Jetta fuel system”.  Here is a cut-n-paste = from the very first hit.  =

1985 Volkswagen Jetta NHTSA = Recall ID Number: = 87V053000

Recall = Date: APR 14, 1987
Component: FUEL = SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Potential Units = Affected: 278520
Summary: = FUEL PUMP, LOCATED INSIDE FUEL TANK, COULD = SEIZE DURING HIGH AMBIENT TEMPERATURES BECAUSE OF AN EXTREME FINE MESH = FUEL FILTER RESTRICTING THE FUEL FLOW.
Consequence: FUEL = SUPPLY TO ENGINE WOULD BE PARTIALLY INTERRUPTED,RESULTING IN = STALLING.
Remedy: INSTALL A = MODIFIED FUEL PUMP AND FILTER.
Notes: VOLKSWAGEN = OF AMERICA,INC,

 

 

Mark = S. 

 =

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of jesse farr
Sent: Thursday, July = 28, 2005 2:42 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Re: fuel filter question

 =

Isn't the reason for that most efi cars have pump in tank so would be kind of = hard to do ?

jofarr, soddy = tn

----- Original Message ----- From: = Mark R Steitle =

,

As I recall, = putting the filter between the tank and pump was true for the pre EFI cars, = which were prone to vapor locking.  But I can’t think of any of = the newer EFI cars that put the filter before the pump (excluding screen filters).  Can you provide any = examples?

 

 

=

 

=

 

=

 

=

 

 

 

 

 

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