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Re: [GMCnet] Fuel Pump Poll [message #239372 is a reply to message #239370]

Mon, 10 February 2014 07:18

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma:

Senior Member

Ken,

All valid points as well.

Bottom line: before I left the USA I purchased everything I need to convert the fuel delivery system to in tank electric pumps and
Poly Armour lines.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Ken Henderson

Rob,

Fear of a ruptured mechanical diaphragm is only part of my refusal to pump
through one.

More important is the question of "why bother?". The benefits from the
rear-mounted electric pump argue in favor of it alone vs a mechanical pump
pump alone; it then follows that in case of a failure, I'd rather have
electrical redundancy than the mechanical pump.

Then there's the question of "why through?". It's trivially more difficult
to run the electrical pump in parallel with the mechanical pump (using
check valves), thus completely avoiding questions of pressure drop across
either of them as well as eliminating the diaphragm rupture question.

The real reason I originally installed the second pump, after deciding that
I would always have redundancy, was the abominable access to the Olds'
mechanical pump. It was a real PITA to get to the darned thing. The ease
of installation and maintenance of the electrical pump was child's play by
comparison, so when it came time to replace the mechanical, I resolved to
never fool with one again.

Finally, the elimination of the selector valve eliminated one more recently
failure-prone item, though mine went on to serve a new owner well.

So, while I was never paranoid about the hazard of diaphragm failure, I
just find it illogical to retain one.

JMHO,

Ken H.

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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[Message index]

		Fuel Pump Poll By: jturbo on Wed, 04 September 2013 03:44
		Re: Fuel Pimp Poll By: kerry pinkerton on Wed, 04 September 2013 06:03
		Re: [GMCnet] Fuel Pimp Poll By: mtnman111 on Wed, 04 September 2013 17:07
		Re: Fuel Pimp Poll By: rvanwin on Wed, 04 September 2013 06:54
		Re: Fuel Pimp Poll By: RF_Burns on Wed, 04 September 2013 07:11
		Re: Fuel Pimp Poll By: George Beckman on Wed, 04 September 2013 07:25
		Re: Fuel Pimp Poll By: jturbo on Wed, 04 September 2013 11:45
		Re: Fuel Pimp Poll By: habbyguy on Wed, 04 September 2013 09:54
		Re: Fuel Pimp Poll By: bwevers on Wed, 04 September 2013 10:13
		Re: Fuel Pump Poll By: bobby5832708 on Wed, 04 September 2013 17:43
		Re: Fuel Pump Poll By: mikethebike on Fri, 07 February 2014 15:23
		Re: Fuel Pump Poll By: corleyw on Fri, 07 February 2014 18:47
		Re: Fuel Pump Poll By: Bob de Kruyff on Fri, 07 February 2014 18:49
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Fri, 07 February 2014 21:36
		Re: [GMCnet] Fuel Pump Poll By: Bob de Kruyff on Fri, 07 February 2014 21:54
		Re: Fuel Pump Poll By: Ken Burton on Sat, 08 February 2014 01:22
		Re: Fuel Pump Poll By: Bob de Kruyff on Sat, 08 February 2014 09:35
		Re: [GMCnet] Fuel Pump Poll By: jimk on Sat, 08 February 2014 10:03
		Re: [GMCnet] Fuel Pump Poll By: Bob de Kruyff on Sat, 08 February 2014 10:59
		Re: [GMCnet] Fuel Pump Poll By: Ken Burton on Sat, 08 February 2014 11:19
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Sat, 08 February 2014 17:53
		Re: [GMCnet] Fuel Pump Poll By: Ken Burton on Sun, 09 February 2014 23:58
		Re: Fuel Pump Poll By: pyolet on Fri, 07 February 2014 21:26
		Re: Fuel Pump Poll By: mikethebike on Sat, 08 February 2014 18:42
		Re: Fuel Pump Poll By: kerry pinkerton on Sat, 08 February 2014 18:26
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Sat, 08 February 2014 18:52
		Re: [GMCnet] Fuel Pump Poll By: Ken Henderson on Sun, 09 February 2014 20:51
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Sun, 09 February 2014 22:19
		Re: [GMCnet] Fuel Pump Poll By: Ken Henderson on Sun, 09 February 2014 22:43
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Sun, 09 February 2014 23:22
		Re: [GMCnet] Fuel Pump Poll By: Ken Henderson on Mon, 10 February 2014 07:00
		Re: [GMCnet] Fuel Pump Poll By: USAussie on Mon, 10 February 2014 07:18
		Re: [GMCnet] Fuel Pump Poll By: jhbridges on Mon, 10 February 2014 13:16
		Re: [GMCnet] Fuel Pump Poll By: James Hupy on Mon, 10 February 2014 13:44
		Re: [GMCnet] Fuel Pump Poll By: jhbridges on Mon, 10 February 2014 17:56
		Re: [GMCnet] Fuel Pump Poll By: Ken Burton on Mon, 10 February 2014 20:36
		Re: [GMCnet] Fuel Pump Poll By: dwayne jacobson[1] on Tue, 11 February 2014 13:12
		Re: [GMCnet] Fuel Pump Poll By: Bob de Kruyff on Mon, 10 February 2014 20:21

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