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| [GMCnet] gas tank drain connections [message #102452] |
Sun, 10 October 2010 20:13  |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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I am thinking maybe we should take JimB's lead (shown below) and connect
the two tanks through the drain holes.
then take it one step further,
only use one pickup
only use one sender
remove the selector switch and the valve
use only one electric pump.
Now we would have one large tank, (connected at the bottom and other places)
and have removed half of the trouble causing devices........
gene
------------------------
old jimB post
---------------------
On fuel injected coaches, I toe a crossover between the drains of the tanks
to allow sharing of fuel right to the bottom which actually negates the need
for 2 senders. If the FI system dumps it's pressure into the fill rail, you
could draw one tank
totally dry without the lower crossover line.
------------------
---------- Forwarded message ----------
From: Ken Henderson <hend4800@bellsouth.net>
Date: Sun, Oct 10, 2010 at 3:40 PM
Subject: Re: [GMCMH-EFI] canister hoses
To: gmcmh-efi@googlegroups.com
Wayne,
I think you've confused Emery and me. I'm not his evil twin (that's Jim K);
but, I do have my fuel return line run into the Aux (fwd) tank drain. I
thought I had a picture posted of that installation but I can't find it
either on the photo site or my computer.
The significance of the photo is that it shows the skid plate I made to
protect the return line from road hazards. Briefly, it's a 1/8" steel
channel about 2-1/2" wide, 3/4" deep and 10" long. With the "U" open
upward, it has a mounting ear welded on each side by which it's bolted
where it crosses beneath the crossmember in front of the Aux tank. Forward
of that the "U" is formed upward to above the bottom of the frame rails to
form a skid. Behind the crossmember, the "U" extends just to the rear of
the drain plug so that it protects the elbow which screws into the drain and
accepts the return line. The width of the "U" allows room for a rubber
lined steel clamp on the line.
Is it strong enough to protect the line from a big obstruction? I dunno,
but it makes me feel better knowing it's there. I'm no more worried about
than the two electric fuel pumps which are mounted in the same area.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Sun, Oct 10, 2010 at 12:20 PM, <superglider@juno.com> wrote:
> ...
For now I have tee'd into the vent line but I really like Emery's
> solution on using the tank drain. Once my tanks don't have 50 gallons of
> fuel I will be doing the same thing.
> ...
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] gas tank drain connections [message #102460 is a reply to message #102452] |
Sun, 10 October 2010 20:40  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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I can't agree with that. First, I don't like the idea of adding another
exposed fuel line, even if covered with something like my skid plate.
Second, it sacrifices the reserve "tank". Third it eliminates the
redundancy of fuel pumps provided by my one-per-tank installation.
Seem like this non-sports-fan heard there's something significant
about 3 strikes. :-)
Ken H.
On Sun, Oct 10, 2010 at 9:13 PM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:
> I am thinking maybe we should take JimB's lead (shown below) and connect
> the two tanks through the drain holes.
>
> then take it one step further,
>
> only use one pickup
> only use one sender
> remove the selector switch and the valve
> use only one electric pump.
>
> Now we would have one large tank, (connected at the bottom and other
> places)
> and have removed half of the trouble causing devices........
>
> gene
>
>
> ------------------------
> old jimB post
> ---------------------
> On fuel injected coaches, I toe a crossover between the drains of the tanks
> to allow sharing of fuel right to the bottom which actually negates the
> need
> for 2 senders. If the FI system dumps it's pressure into the fill rail,
> you
> could draw one tank
> totally dry without the lower crossover line.
> ------------------
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] gas tank drain connections [message #102499 is a reply to message #102467] |
Mon, 11 October 2010 00:54 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Mr ERFisher wrote on Sun, 10 October 2010 21:16 |
> Second, it sacrifices the reserve "tank".
which does not exist
|
It does on my coach. I used it just last week on my way home from DuQuoin.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] gas tank drain connections [message #102511 is a reply to message #102467] |
Mon, 11 October 2010 06:43 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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On Sun, Oct 10, 2010 at 10:16 PM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:
> > Second, it sacrifices the reserve "tank".
>
>
> which does not exist
Hmmmm...Wonder what's happening when I give out of gas with Main selected
and switch to Aux to get to the gas station, maybe 30 miles away?
>
> > Third it eliminates the
> > redundancy of fuel pumps provided by my one-per-tank installation.
> >
> > gee none of my other cars have 3 or 4 fuel pumps ;>)
>
When was the last time one of them stranded you on the road -- along with
your bed, bath, food, and clothing?
>
and
>
> now withe fuel problems, these appear to be more failure points, not
> "redundancy"
>
A 50% failure rate is just that. Redundant 50% failure rates yield a 25%
failure rate. Maybe I SHOULD install 1 or 2 more pumps to get that down to
12.5% or 6.25%?
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] gas tank drain connections [message #102523 is a reply to message #102511] |
Mon, 11 October 2010 08:11 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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>
> > > Second, it sacrifices the reserve "tank".
> >
> >
> > which does not exist
>
>
> Hmmmm...Wonder what's happening when I give out of gas with Main selected
> and switch to Aux to get to the gas station, maybe 30 miles away?
>
> says you should have filled up 300 miles ago
and you never went down hill
you were not on an efi pumping gas into the wrong tank
> >
> > > Third it eliminates the
> > > redundancy of fuel pumps provided by my one-per-tank installation.
> > >
> > > gee none of my other cars have 3 or 4 fuel pumps ;>)
> >
>
> When was the last time one of them stranded you on the road -- along with
> your bed, bath, food, and clothing?
>
at least I would not have to wonder which of the 3 pumps, 2 senders, 2
pickups, tank selector, tank switch, and 20 feet of extra fuel line
--- was broken.
> >
>
> and
> >
> > now withe fuel problems, these appear to be more failure points, not
> > "redundancy"
> >
>
> A 50% failure rate is just that. Redundant 50% failure rates yield a 25%
> failure rate. Maybe I SHOULD install 1 or 2 more pumps to get that down to
> 12.5% or 6.25%?
>
>
> >
>
just saying, think about it, simple is better.
gene
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
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| Re: [GMCnet] gas tank drain connections [message #102548 is a reply to message #102523] |
Mon, 11 October 2010 11:15 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Put the radiator for thermo-siphon engine cooling & the gas tank too for
gravity feed. Solar panels for 12 VDC so the alternator can go. Since
there won't be any night driving, you can just open the windows for cooling,
so remove all the A/C & the Onan. When the refrigerator quits or runs out
of LPG, just use ice. Campfires are nice when the nights are so long, so
the stove's not necessary either.
Wonder how many fail-able parts that removes?
Oh yeah, just to prove I understand your position, I removed the rear brakes
to compensate for the added fuel pump. :-)
Ken H.
On Mon, Oct 11, 2010 at 9:11 AM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:
> ...
>
just saying, think about it, simple is better.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] gas tank drain connections [message #102550 is a reply to message #102548] |
Mon, 11 October 2010 11:18 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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> Put the radiator for thermo-siphon engine cooling & the gas tank too for
> gravity feed. Solar panels for 12 VDC so the alternator can go. Since
> there won't be any night driving, you can just open the windows for
> cooling,
> so remove all the A/C & the Onan. When the refrigerator quits or runs out
> of LPG, just use ice. Campfires are nice when the nights are so long, so
> the stove's not necessary either.
>
> good plan, let me know how it goes
gene
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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