The Murphy Builders Site

Hi Mike, a lot of Moose use the facet - 48053 12V 45GPM 6.5 to 7.5 PSI and
we only use it for priming during start so it free flows as do a lot of the
facet. Probably find it cheaper but here it is at ASS.

http://www.aircraftspruce.com/catalog/e ... erpump.php

Scott

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Mike
Kimball
Sent: Wednesday, September 21, 2005 11:55 PM
To: rebel-builders@dcsol.com
Subject: Free flow fuel pump

I just got a Holley electric fuel pump from Summit Racing for my V8
installation. I tried to blow through it to get an idea of whether it would
flow fuel when it's not running. I would say, NO, it will not flow without
running. I could only get a small amount of air through it. Does anybody
know of an electric fuel pump that does not significantly restrict flow when
it's not running? If not, I will have to go back to my original idea of not
having a fuel pump at all. Gravity flow only. I'm not going to risk a
failed pump killing my engine. The two Cherokees I have owned had auxiliary
fuel pumps that you chose to run, usually during takeoffs and landings, and
fuel flowed when it wasn't running. But those pumps cost $750!!! Surely,
there's a less expensive option. Tomorrow I am going to start rigging a 5
gallon jerry can to feed fuel to my carb through my installed fuel system.
The fuselage is in a level attitude in my shop. I have a fuel pressure
gauge installed at the carb. I'll be interested to see how much pressure I
get with 5 gallons of fuel. If it's enough, I'll probably just go without a
fuel pump at all.



In case anyone is interested, I have my complete cooling system in place. I
am quite impressed with the CoolFlex copper radiator "hoses". And I plumbed
in a 120VAC coolant heater for winter operation in Fairbanks, Alaska. My
exhaust is about two days from completion. No mufflers. Should be
impressive sounding. Hope it's not too loud. Or maybe not.



Mike

044SR





-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------






-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

I just got a Holley electric fuel pump from Summit Racing for my V8
installation. I tried to blow through it to get an idea of whether it would
flow fuel when it's not running. I would say, NO, it will not flow without
running. I could only get a small amount of air through it. Does anybody
know of an electric fuel pump that does not significantly restrict flow when
it's not running? If not, I will have to go back to my original idea of not
having a fuel pump at all. Gravity flow only. I'm not going to risk a
failed pump killing my engine. The two Cherokees I have owned had auxiliary
fuel pumps that you chose to run, usually during takeoffs and landings, and
fuel flowed when it wasn't running. But those pumps cost $750!!! Surely,
there's a less expensive option. Tomorrow I am going to start rigging a 5
gallon jerry can to feed fuel to my carb through my installed fuel system.
The fuselage is in a level attitude in my shop. I have a fuel pressure
gauge installed at the carb. I'll be interested to see how much pressure I
get with 5 gallons of fuel. If it's enough, I'll probably just go without a
fuel pump at all.



In case anyone is interested, I have my complete cooling system in place. I
am quite impressed with the CoolFlex copper radiator "hoses". And I plumbed
in a 120VAC coolant heater for winter operation in Fairbanks, Alaska. My
exhaust is about two days from completion. No mufflers. Should be
impressive sounding. Hope it's not too loud. Or maybe not.



Mike

044SR





-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

I'm not familiar with Holley's but I've seen submersibles that are
roller displacement and ones that are what I'd call disk impellor
centrifugal pumps. The latter type well flow when off but the ones that
I've seen incorporate an output check valve that would have to be
removed for your purposes. That would likely be easier than adding the
extra external check valves that I had to incorporate to get dual
parallel pumps that were immune to all failure modes of the second pump ;)

I know I like to hear about your progress Mike and I'm glad the cool
flex worked for you. With a carb on top of the engine, low fuel, and a
climbing attitude (a go around), it will be interesting to see if you
get sufficient gravity flow.

Ken

Mike Kimball wrote:

I just got a Holley electric fuel pump from Summit Racing for my V8
installation. I tried to blow through it to get an idea of whether it would
flow fuel when it's not running. I would say, NO, it will not flow without
running. I could only get a small amount of air through it. Does anybody
know of an electric fuel pump that does not significantly restrict flow when
it's not running? If not, I will have to go back to my original idea of not
having a fuel pump at all. Gravity flow only. I'm not going to risk a
failed pump killing my engine. The two Cherokees I have owned had auxiliary
fuel pumps that you chose to run, usually during takeoffs and landings, and
fuel flowed when it wasn't running. But those pumps cost $750!!! Surely,
there's a less expensive option. Tomorrow I am going to start rigging a 5
gallon jerry can to feed fuel to my carb through my installed fuel system.
The fuselage is in a level attitude in my shop. I have a fuel pressure
gauge installed at the carb. I'll be interested to see how much pressure I
get with 5 gallons of fuel. If it's enough, I'll probably just go without a
fuel pump at all.



In case anyone is interested, I have my complete cooling system in place. I
am quite impressed with the CoolFlex copper radiator "hoses". And I plumbed
in a 120VAC coolant heater for winter operation in Fairbanks, Alaska. My
exhaust is about two days from completion. No mufflers. Should be
impressive sounding. Hope it's not too loud. Or maybe not.



Mike

044SR

-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

Hi Mike , Facet makes a pump for around $35.00 that will flow fuel when not
in use. Some local autoparts carry them I know the NAPA store here does.
Hope this helps. Later Dale




-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

Mike,

In some applications this may be by design... acts like a check valve. I am planning on 2 pumps in parallel, each with check valves. If one fails, you don't want it to allow for flow. If it flows, the fuel pressure can drop significantly, hence the need for a check valve. Just a thought.

Rick Muller
SR70

-------------- Original message --------------

I just got a Holley electric fuel pump from Summit Racing for my V8
installation. I tried to blow through it to get an idea of whether it would
flow fuel when it's not running. I would say, NO, it will not flow without
running. I could only get a small amount of air through it. Does anybody
know of an electric fuel pump that does not significantly restrict flow when
it's not running? If not, I will have to go back to my original idea of not
having a fuel pump at all. Gravity flow only. I'm not going to risk a
failed pump killing my engine. The two Cherokees I have owned had auxiliary
fuel pumps that you chose to run, usually during takeoffs and landings, and
fuel flowed when it wasn't running. But those pumps cost $750!!! Surely,
there's a less expensive option. Tomorrow I am going to start rigging a 5
gallon jerry can to feed fuel to my carb through my installed fuel system.
The fuselage is in a level attitude in my shop. I have a fuel pressure
gauge installed at the carb. I'll be interested to see how much pressure I
get with 5 gallons of fuel. If it's enough, I'll probably just go without a
fuel pump at all.



In case anyone is interested, I have my complete cooling system in place. I
am quite impressed with the CoolFlex copper radiator "hoses". And I plumbed
in a 120VAC coolant heater for winter operation in Fairbanks, Alaska. My
exhaust is about two days from completion. No mufflers. Should be
impressive sounding. Hope it's not too loud. Or maybe not.



Mike

044SR





-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------