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Re: [GMCnet] &@":'#^>#! Mice! [message #323793 is a reply to message #323790]

Tue, 12 September 2017 12:28

Richard Denney

Messages: 920
Registered: April 2010

Karma:

Senior Member

Well, not quite. The cross-sectional area of the fill-vent 3/8" line is
0.11 square inches. Two of those feed the cross-sectional area of a 1/2"
line, which is 0.20 square inches. The cross-sectional area of the evap
vent 5/16" line is 0.08 square inches, and one of them service both tanks.
Plus, it vents into the carbon canister, which doesn't vent very fast.

A 3/4" fill vent would have the cross-sectional area of 0.44 square inches,
more than twice the 1/2" line, and still very much larger than the sum of
the two cent systems. It would also be much less likely to submerge dips in
the line.

Most tanks vent well through the fill tube, and the fill vent is a backup.
We have to move 7 cubic feet of air through that half-inch line. Slooow.

Rick "area not diameter" Denney

On Tue, Sep 12, 2017 at 12:46 PM gene Fisher wrote:

> On Tue, Sep 12, 2017 at 7:26 AM Richard Denney wrote:
>
>> 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?
>>
> You already have a 3/4 in vent
>
> read here
>
> http://www.gmcmhphotos.com/photos/gas-tank-hard-lines/p45975-tank-vents1-pdf-file.html
>
>
>
>> Rick "thinking what is really needed is a 1" fill vent" Denney
>>
>> On Tue, Sep 12, 2017 at 8:58 AM, Matt Colie
> wrote:
>>
>>> Too bad you didn't think to run that fill vent line up to under the cab
>>> floor. It makes fueling go much better.
>>> But, I think I wrote all about that when you were not around here much.
>>>
>>> You do know that if you put in that 15 gallons fast, it could all be in
>>> the main tank. That is the way that it wants to go.
>>>
>>> Matt - See you in Elkhart
>>> --
>>> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
>>> Electronically Controlled Quiet Engine Cooling Fan
>>> OE Rear Drum Brakes with Applied Control Arms
>>> SE Michigan - Twixt A2 and Detroit
>>>
>>> _______________________________________________
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>>>
>>
>>
>>
>> --
>> '73 X-Glacier 230 "Jaws"
>> Northern Virginia
>> Offlist email: rick at rickdenney dot com
>> _______________________________________________
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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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--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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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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