Home » Public Forums » GMCnet » DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173503] |
Sat, 16 June 2012 09:38 |
glacierfl
Messages: 444 Registered: June 2011
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Hello,
I could not believe this gauge. Its incredable..
It can read gallons, litres, %.
It works on 90 ohm senders.
Looks like you can calibrate it.
If i am correct you can set the gallons etc with set points, so you can calibrate a gas tank, of any shape/size and it should be accurate. Oh it has alarms, and can switch tanks based on your settings...
Perhaps that would mean an end to never knowing how much gas you have left.
http://www.cruzpro.co.nz/fu60mano.pdf
cheers and beers
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173514 is a reply to message #173503] |
Sat, 16 June 2012 11:31 |
Ken Henderson
Messages: 8726 Registered: March 2004 Location: Americus, GA
Karma: 9
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Steve,
Very impressive description. BUT, it depends on the least reliable part of
our existing systems: the sender.
Besides, at $200+, it doesn't even cook breakfast, bake cookies, nor empty
the black water tank!
Ken "Kill Joy" H.
On Sat, Jun 16, 2012 at 10:38 AM, steve & debbie wrote:
>
>
> Hello,
> I could not believe this gauge. Its incredable..
> It can read gallons, litres, %.
> It works on 90 ohm senders.
> Looks like you can calibrate it.
> If i am correct you can set the gallons etc with set points, so you can
> calibrate a gas tank, of any shape/size and it should be accurate. Oh it
> has alarms, and can switch tanks based on your settings...
>
> Perhaps that would mean an end to never knowing how much gas you have left.
>
> http://www.cruzpro.co.nz/fu60mano.pdf
>
>
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173524 is a reply to message #173518] |
Sat, 16 June 2012 12:56 |
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ljdavick
Messages: 3548 Registered: March 2007 Location: Fremont, CA
Karma: -3
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The gallons remaining might not be very accurate because of the way our tanks are interconnected. Still who can say no to a shiny new fancy toy!
If it could connect to both senders and figure out the math, then you could display gallons remaining. A more accurate calculation might take fuel flow into consideration, but then you would also have to include the Onan.
Like some - my fuel tanks empty slower than my bladder fills. I’m rarely at risk for running out of gas.
Larry Davick
The Mystery Machine
1976(ish) Palm Beach
Fremont, CA
On Jun 16, 2012, at 10:16 AM, steve & debbie wrote:
>
>
> Hello Ken,
> Well that was i thought one of the good points of this gauge. It compensates for the senders values, and the tank also. Remember its designed to be accurate in all sizes of boat fuel tanks.
> Also it opens up the possible use of other senders. I am totally hooked on this. We want to travel in areas where you need to know the fuel you have left. When you calibrate , it takes whatever the sender values are, it does not need 0-90 ohms, it would work with 8-79 ohms ans still be accurate. So in that case then 8 ohms would be empty, 79 full.
> As you can tell i am sold on this one. 8o
>
> cheers and beers
> --
> Steve & Debbie
> Monticello, FL
> 77 Palm Beach :- Aurora
> EX G4WDT
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173530 is a reply to message #173518] |
Sat, 16 June 2012 13:33 |
Ken Henderson
Messages: 8726 Registered: March 2004 Location: Americus, GA
Karma: 9
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Might work -- IF you can get the senders to be repeatable. I wonder how
it's going to like our sometimes separate, sometimes combined, dual
tanks...especially when you switch tanks. That's going to be some sort of
strange looking calibration table. :-)
I suspect you'll have to do JimB's tank combination mod if you want the
gauge to be able to contend with the tanks' configuration. Might be best
to just use it on the Main and always have the un-measured reserve in the
Aux.
Ken H.
On Sat, Jun 16, 2012 at 1:16 PM, steve & debbie wrote:
>
>
> Hello Ken,
> Well that was i thought one of the good points of this gauge. It
> compensates for the senders values, and the tank also. Remember its
> designed to be accurate in all sizes of boat fuel tanks.
> Also it opens up the possible use of other senders. I am totally hooked on
> this. We want to travel in areas where you need to know the fuel you have
> left. When you calibrate , it takes whatever the sender values are, it does
> not need 0-90 ohms, it would work with 8-79 ohms ans still be accurate. So
> in that case then 8 ohms would be empty, 79 full.
> As you can tell i am sold on this one. 8o
>
>
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173552 is a reply to message #173503] |
Sat, 16 June 2012 17:22 |
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USAussie
Messages: 15912 Registered: July 2007 Location: Sydney, Australia
Karma: 6
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Steve,
I don't know why you've noted this:
"Perhaps that would mean an end to never knowing how much gas you have
left." In Double Trouble when I switch from Main to Aux the fuel gauge
indicates the level of fuel in the tank I have switched to. Doesn't
everybody's?
As far as this gauge goes you are 100% correct it's "all singing, all
dancing." I can understand the requirement for a gauge like this on a boat,
if you're twenty miles out a sea and run out of gas it's a problem.
Here in Australia they have ads on the TV from the government that say "Stop
- Revive - Survive."
http://www.travellers-autobarn.com.au/blog/stop-revive-survive-this-holiday-
season/
Basically it says to stop every two hours when driving long distances.
That's 120 miles at 60 mph. Using Mr. ERF's Law of GMC Fuel Consumption that
distance would burn 15 gallons of fuel @ 8 mpg. How's that for demonstrating
some awesome math skills! ;-) So every other rest stop you make a fuel stop.
Come to think of it if you're having vapor lock problems you could make it a
fuel stop every two hours and adding 15 gallons to the fuel in the tanks
would cool it down.
I'd rather spend the dosh on something that reduce problems in the fuel
system like metal fuel lines, external fuel filter, electric fuel pumps etc.
Regards,
Rob M.
-----Original Message-----
From: steve & debbie
Hello,
I could not believe this gauge. Its incredable..
It can read gallons, litres, %.
It works on 90 ohm senders.
Looks like you can calibrate it.
If i am correct you can set the gallons etc with set points, so you can
calibrate a gas tank, of any shape/size and it should be accurate. Oh it has
alarms, and can switch tanks based on your settings...
Perhaps that would mean an end to never knowing how much gas you have left.
http://www.cruzpro.co.nz/fu60mano.pdf
cheers and beers
--
Steve & Debbie
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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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Re: DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173615 is a reply to message #173503] |
Sun, 17 June 2012 00:10 |
glacierfl
Messages: 444 Registered: June 2011
Karma: 0
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Hello,
I have a question, it might seem a bit stupid but here goes...
Is it possible to separate the fuel tanks, and treat them as individual tanks??. Each with own lines etc. There is madness to my method....
cheers and beers
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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Re: DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173616 is a reply to message #173615] |
Sun, 17 June 2012 01:12 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
Karma: 10
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glacierfl wrote on Sun, 17 June 2012 00:10 | Hello,
I have a question, it might seem a bit stupid but here goes...
Is it possible to separate the fuel tanks, and treat them as individual tanks??. Each with own lines etc. There is madness to my method....
cheers and beers
|
Sure,
Cut a hold in the side of your coach and mount a separate fill tube. Then drill a hole through the frame to allow the tube to reach the tank.
Or mount a fuel shutoff valve between the two tanks. Open during filling, and closed at all other times. The valve could be electrically operated.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Re: DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173628 is a reply to message #173615] |
Sun, 17 June 2012 08:58 |
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Matt Colie
Messages: 8547 Registered: March 2007 Location: S.E. Michigan
Karma: 7
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glacierfl wrote on Sun, 17 June 2012 01:10 | Hello,
I have a question, it might seem a bit stupid but here goes...
Is it possible to separate the fuel tanks, and treat them as individual tanks??. Each with own lines etc. There is madness to my method....
cheers and beers
Steve
|
Steve,
You can do all that with separate fills, lots of valves and fancy gauges, or, you could learn to do fuel management. This is something that every pilot of a non-road vehicle has to learn early or it may end his career. (And, prove Darwin was right.)
This means start by learning a driving style that is regular as to the fuel rate. This is more difficult in rough terrain, but it can be done.
Next is to keep an accurate log of fuel stops and other consumption (like idle time and APU/load hours). You will quickly learn that you can know your fuel load (inventory) to a very close degree.
How close can you get this way??
I have yet to fuel on the road. (Yes, it could still happen.) Twice, I have driven up to the pumps and put on more that 50 gallons of fuel. I don't like to run that close, and it is not a good idea for lots of reasons.
Start by writing the mileage and other notes on the pump receipts. I write that, alcohol % and how good the fill was. Sometimes fills go poorly (related to Ehol content typically) and so note. If it is a long run, then I revise the stop in the the navigation program (SA) and let it tell me where to look to fuel next. If it is not, I just watch the Odo and that fuel slip. When I get to 450 (for us in our coach), I start to worry.
If you manage your fuel correctly (safely) you may end up buying fuel at disadvantageous price, but that is a fact of this type of travel.
As James (the younger) Miller was telling John Armstrong as we replaced a burned up level sensor, the FAA requires that a fuel level only be accurate at zero. (Meaning if the says zero, count on that.)
Short story:
At one time, under contract to Chrysler/introl (their instrument division at the time) I was part of a group trying develop a gauging system for shallow - wide fuel tanks. You would not believe some of the strange things we built and tried. Nothing worked. And you know what? With all the modern whiz-bang electronical stuff available today, still nothing works for that application. As of last year, most manufactures still admitted that they built in a reserve factor to cover the fact that the gauges were no good at predicting empty.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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Re: DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173639 is a reply to message #173615] |
Sun, 17 June 2012 11:00 |
shawnee
Messages: 422 Registered: February 2004 Location: NC
Karma: 0
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Senior Member |
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glacierfl wrote on Sun, 17 June 2012 01:10 | Hello,
I have a question, it might seem a bit stupid but here goes...
Is it possible to separate the fuel tanks, and treat them as individual tanks??. Each with own lines etc. There is madness to my method....
cheers and beers
|
Steve,
I use two electric fuel pumps and each serves one tank. It gives me an installed spare. I also have a filter before each pump. I use a check valve on the discharge of each pump and go to a common line to the carb. I use a relay on each pump and each is activated by a switch that goes to an oil pressure switch to make sure the pumps will not work when no oil pressure
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173642 is a reply to message #173639] |
Sun, 17 June 2012 11:07 |
Ken Henderson
Messages: 8726 Registered: March 2004 Location: Americus, GA
Karma: 9
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Gene,
Do you have each relay on a separate LOP switch? Because I've had several
of those fail over the years, I'm considering making them redundant.
Ken H.
On Sun, Jun 17, 2012 at 12:00 PM, Gene Dotson wrote:
>
> I use two electric fuel pumps and each serves one tank. It gives me an
> installed spare. I also have a filter before each pump. I use a check
> valve on the discharge of each pump and go to a common line to the carb. I
> use a relay on each pump and each is activated by a switch that goes to an
> oil pressure switch to make sure the pumps will not work when no oil
> pressure
>
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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] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173655 is a reply to message #173561] |
Sun, 17 June 2012 12:23 |
jhbridges
Messages: 8412 Registered: May 2011 Location: Braselton ga
Karma: -74
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I'm just the opposite. The BWD needs to get out and mark a bush or two every now andd again. I am currently planning my trips out with the aid of the Pure-gas 'no alcohol' locations. This makes summer show trips with a box stock fuel system less of a concern. I look for gas stops in a 250 - 300 mile window, close to freeway rest areas.
--johnny
'76 23' trandmode norris
'76 palm beach
From: Kelvin Dietz <kelvin@datsuns.com>
To: gmclist@temp.gmcnet.org
Sent: Saturday, June 16, 2012 7:03 PM
Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
The beauty of motor home travel is there is a bathroom onboard for She
Who Loads the Food to use so I DON'T have to stop.
5 hours minimum. I've done 8 without a stop by careful hydration.
Stopping every two hours would take the fun out of it for me.
We did a road trip with my Brother-in-Law and his wife. That's how he
did it. And heck... he even took a nap during one stop. 'Bout drive me
crazy. "We'll meet you there", is the response now.
My 2¢
Kelvin
'73 23' in Eugene, OR
On 6/16/2012 3:22 PM, Robert Mueller wrote:
> Steve,
>
> I don't know why you've noted this:
>
> "Perhaps that would mean an end to never knowing how much gas you have
> left." In Double Trouble when I switch from Main to Aux the fuel gauge
> indicates the level of fuel in the tank I have switched to. Doesn't
> everybody's?
>
> As far as this gauge goes you are 100% correct it's "all singing, all
> dancing." I can understand the requirement for a gauge like this on a boat,
> if you're twenty miles out a sea and run out of gas it's a problem.
>
> Here in Australia they have ads on the TV from the government that say "Stop
> - Revive - Survive."
>
> http://www.travellers-autobarn.com.au/blog/stop-revive-survive-this-holiday-
> season/
>
> Basically it says to stop every two hours when driving long distances.
> That's 120 miles at 60 mph. Using Mr. ERF's Law of GMC Fuel Consumption that
> distance would burn 15 gallons of fuel @ 8 mpg. How's that for demonstrating
> some awesome math skills! ;-) So every other rest stop you make a fuel stop.
> Come to think of it if you're having vapor lock problems you could make it a
> fuel stop every two hours and adding 15 gallons to the fuel in the tanks
> would cool it down.
>
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173721 is a reply to message #173700] |
Mon, 18 June 2012 07:46 |
jhbridges
Messages: 8412 Registered: May 2011 Location: Braselton ga
Karma: -74
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It's measuring the weight of the column of fuel. If you can find a pressure transducer which will differentiate between a quarter inch of gasoline and about 8 inches of gasoline, you've got the answer. Wouldn't even need air to run it. I don't know of such a transducer which is sufficiently rugged for reliable rioad service.
--johnny
"76 23' transmode norris
'76 palm beach
From: J Mills <mills@bmi.net>
To: gmclist@temp.gmcnet.org
Sent: Sunday, June 17, 2012 7:04 PM
Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
Did the group ever try an "air pressure/bubbler" rig. Locomotives use
that for the electronic fuel gauge, of course they have LOTS of "free"
pressurized air. The system puts a regulated air supply into a tube
that runs to the bottom of the tank then measures the pressure in that
line. The idea is that it takes more pressure to blow bubbles in a full
tank than an empty one.
--
Jim Mills KD0NPU
Greeley, CO
1973 CanyonLands 260
TZE-063V100731(under renovation)
On Sun, 2012-06-17 at 08:59 -0500, Matt Colie wrote:
> Matt Colie <matt7323tze@gmail.com>
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173758 is a reply to message #173756] |
Mon, 18 June 2012 11:59 |
jhbridges
Messages: 8412 Registered: May 2011 Location: Braselton ga
Karma: -74
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Senior Member |
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3 1/2"? Geez, the locomotives around here (EMDs) all got tanks which look to be a couple of feet tall. I never measured one though.
--johnny
'76 23' transmode norris
'76 palm beach
From: J Mills <mills@bmi.net>
To: gmclist@temp.gmcnet.org
Sent: Monday, June 18, 2012 12:01 PM
Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
I guess that the difference between 8" of gasoline and 3 1/2' of #2
diesel does complicate things.
I suspect that the transducer does exist but it is probably not
affordable.
--
Jim Mills KD0NPU
Greeley, CO
1973 CanyonLands 260
TZE-063V100731(under renovation)
On Mon, 2012-06-18 at 05:46 -0700, Johnny Bridges wrote:
> It's measuring the weight of the column of fuel. If you can find a pressure transducer which will differentiate between a quarter inch of gasoline and about 8 inches of gasoline, you've got the answer. Wouldn't even need air to run it. I don't know of such a transducer which is sufficiently rugged for reliable rioad service.
>
>
> --johnny
> "76 23' transmode norris
> '76 palm beach
>
> From: J Mills <mills@bmi.net>
> To: gmclist@temp.gmcnet.org
> Sent: Sunday, June 17, 2012 7:04 PM
> Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
>
> Did the group ever try an "air pressure/bubbler" rig. Locomotives use
> that for the electronic fuel gauge, of course they have LOTS of "free"
> pressurized air. The system puts a regulated air supply into a tube
> that runs to the bottom of the tank then measures the pressure in that
> line. The idea is that it takes more pressure to blow bubbles in a full
> tank than an empty one.
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS... [message #173898 is a reply to message #173779] |
Tue, 19 June 2012 06:42 |
jhbridges
Messages: 8412 Registered: May 2011 Location: Braselton ga
Karma: -74
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Senior Member |
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You likely did and I misread it.
Back in The Day, Ampex and RCA stepped lightly developing videotape machines. They wanted a srandard but to agree directly would of been 'in restraint of trade'.
--johnny
'76 23' transmode norris
'76 palm beach
From: J Mills <mills@bmi.net>
To: gmclist@temp.gmcnet.org
Sent: Monday, June 18, 2012 2:22 PM
Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
I was sure I marked it as 3 1/2 FEET. Actually the tank is deeper than
that but the tube doesn't go all the way to the bottom - at least on GEs
- I wasn't supposed to touch the later generation EMDs. The Feds are
really "touchy" about collusion among competitors.
--
Jim Mills KD0NPU
Greeley, CO
1973 CanyonLands 260
TZE-063V100731(under renovation)
On Mon, 2012-06-18 at 09:59 -0700, Johnny Bridges wrote:
> 3 1/2"? Geez, the locomotives around here (EMDs) all got tanks which look to be a couple of feet tall. I never measured one though.
>
> --johnny
> '76 23' transmode norris
> '76 palm beach
>
> From: J Mills <mills@bmi.net>
> To: gmclist@temp.gmcnet.org
> Sent: Monday, June 18, 2012 12:01 PM
> Subject: Re: [GMCnet] DIGITAL FUEL GAUGE YOU WONT BELIEVE THIS...
>
> I guess that the difference between 8" of gasoline and 3 1/2' of #2
> diesel does complicate things.
> I suspect that the transducer does exist but it is probably not
> affordable.
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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