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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-------
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.
-------Original Message-------
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.
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1985 Volkswagen Jetta NHTSA Recall ID Number: 87V053000 |
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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, |
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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 ?
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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