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Re: [GMCnet] &@":'#^>#! Mice! [message #323810 is a reply to message #323787]

Tue, 12 September 2017 16:38

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma:

Senior Member

Richard Denney wrote on Tue, 12 September 2017 10:25

Matt,

I hope it's true that it all ended up in the main tank, and that is indeed possible. 15 gallons wouldn't necessarily submerge the fill tubes by enough for the tanks to equalize. I hadn't thought of that.

The fill tubing is already up under the floor or jammed against the top of the inside of the frame rail, a good three inches higher than what the level would be in the fill tube. I don't know how it would be much higher.
This is a '73, so there is no sub-floor. What am I missing in what you are saying?

Rick "thinking what is really needed is a 1" fill vent" Denney
--
'73 X-Glacier 230 "Jaws"

Rick,

Don't bother changing the size of the fill vent, just extend the lines as far and as high as you can. That alone will fix most of the problems with the stock fuel system.

I had an interesting experience early in my GMC life. The coach was used for my boat work only and so I ended up off the big roads often. I did not yet have anything like as much experience as the last ten years and seventy thousand miles have brought me.

Ready for one of Matt's stories?? Read on....
I was not keeping very good track of my fuel inventory and use - yet. I was trying to get home from a BFE location and the fuel light had been on a while. The coach stumbled and I switched to the auxiliary tank I hoped it had enough fuel to get me somewhere, but then I realized that there was nowhere that I wanted to buy fuel and the best shot was a country no-brand for a small diversion. I made it there, and before I could do anything a person came out and warned me that they could only take cash today. I had a single 20$ bill. So, I put that about eight and an half gallons in and headed for home. That should be good enough.

(Now - Remember when you were young and had a motorcycle with a three position fuel cock??? And you put some gas in it and took off. Then when it stumbled and you reached down to the gas cock only to find it was already in the "reserve" position? - I never did this, but I heard about it.)

A few miles down the road, the coach stumbled again. I looked down and the switch was still at "Aux". I though I was done. There should be fuel there...
I switched back to main and the engine caught and stayed running. After the breathing and adrenaline had settled, I looked again and the gauge was now about a quarter... Just for S&G, I did a quick switch back and on Aux, the needle went flat.

I was out of jobs for more than a week then so I decided to take the CFD software "borrowed" from a former employer and the notes from when I had to have things apart to replace the fill vent lines that has rotted out and do a mathematical model of the system. Well I did, then I used the model to put fuel in the system at the 10 GPM. (That is the EPA maximum of a motor fuel dispenser).

Well, of that 10 gallons of electronic gasoline, nine and change went into the main tank. So, what do I have? Maybe five miles of my electrons in the auxiliary tank? Well, that was about right.

The mod that I did to the fill vent can be read under "Recommending High T" if you do a search of old postings. That really only matters if you want to put more that 25 gallons in at once.

Matt - loading for Elkhart tonight

If you fuel fast,

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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[Message index]

		[GMCnet] &@":'#^>#! Mice! By: Richard Denney on Fri, 01 September 2017 18:04
		Re: [GMCnet] &@":'#^>#! Mice! By: Harry on Fri, 01 September 2017 22:11
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Fri, 01 September 2017 22:32
		Re: [GMCnet] &@":'#^>#! Mice! By: k2gkk on Sat, 02 September 2017 10:33
		Re: [GMCnet] &@":'#^>#! Mice! By: Sandra Price on Sat, 02 September 2017 11:23
		Re: [GMCnet] &@":'#^>#! Mice! By: jimk on Sat, 02 September 2017 09:54
		Re: [GMCnet] &@":'#^>#! Mice! By: Emery Stora on Sat, 02 September 2017 10:23
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 13:50
		Re: [GMCnet] &@":'#^>#! Mice! By: emerystora on Sat, 02 September 2017 14:00
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 15:51
		Re: [GMCnet] &@":'#^>#! Mice! By: Emery Stora on Sat, 02 September 2017 16:13
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 16:39
		Re: [GMCnet] &@":'#^>#! Mice! By: RF_Burns on Sat, 02 September 2017 19:41
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 20:06
		Re: [GMCnet] &@":'#^>#! Mice! By: Ken Henderson on Sat, 02 September 2017 21:43
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 22:14
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 02 September 2017 22:15
		Re: [GMCnet] &@":'#^>#! Mice! By: Matt Colie on Sun, 03 September 2017 08:03
		Re: [GMCnet] &@":'#^>#! Mice! By: Ken Henderson on Sun, 03 September 2017 11:08
		Re: [GMCnet] &@":'#^>#! Mice! By: <rallymaster on Sun, 03 September 2017 22:14
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Mon, 04 September 2017 21:19
		Re: [GMCnet] &@":'#^>#! Mice! By: Ken Henderson on Mon, 04 September 2017 22:24
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Sat, 09 September 2017 15:00
		Re: [GMCnet] &@":'#^>#! Mice! By: GatsbysCruise on Tue, 05 September 2017 13:27
		Re: [GMCnet] &@":'#^>#! Mice! By: jhbridges on Tue, 05 September 2017 14:27
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Mon, 11 September 2017 22:59
		Re: [GMCnet] &@":'#^>#! Mice! By: Matt Colie on Tue, 12 September 2017 07:58
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Tue, 12 September 2017 09:25
		Re: [GMCnet] &@":'#^>#! Mice! By: Mr ERFisher on Tue, 12 September 2017 11:39
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Tue, 12 September 2017 12:28
		Re: [GMCnet] &@":'#^>#! Mice! By: Matt Colie on Tue, 12 September 2017 16:38
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Wed, 13 September 2017 10:20
		Re: [GMCnet] &@":'#^>#! Mice! By: Matt Colie on Wed, 13 September 2017 16:25
		Re: [GMCnet] &@":'#^>#! Mice! By: James Hupy on Wed, 13 September 2017 17:07
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Thu, 14 September 2017 21:55
		Re: [GMCnet] &@":'#^>#! Mice! By: Ken Henderson on Thu, 14 September 2017 22:09
		Re: [GMCnet] &@":'#^>#! Mice! By: Richard Denney on Thu, 14 September 2017 22:51

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