| [GMCnet] Clasco on the road [message #211620] |
Wed, 19 June 2013 12:52  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Correction. In my last post trying to determine why we are having no vapor lock issue I mistakenly said we were only at low altitudes. That is wrong. This morning in New Mexico on the 10 we passed over the Continental Divide and the sign said we were at 4500 feet. That is higher than the highest point on the I5, the major N/S highway on the west coast. Coming into Benson AZ a short time ago we had a long steep climb on a very hot day, stiLl with no issue. I am more and more thinking it must be either the large forward mounted fuel filter/water separator or the ethanol treatments added to each fill up. Could also be the quality brand name gas but we cannot be the only ones in the fleet doing that.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed & hand crafted
in the 1907 former Masonic Temple building
in historic Kerby, OR
Http://jerrywork.com
541-592-5360
Cell 541-499-1027
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Clasco on the road [message #211622 is a reply to message #211620] |
Wed, 19 June 2013 13:10  |
Don A
Messages: 895
Registered: October 2008
Location: Dallas, TX
Karma: 0
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That is very interesting. We have had a lot of clouds the last few days. Are your days hot and sunny?
While the large forward mounted fuel filter/water separator seems like a great idea. Some problems were of boiling in the tanks and pressure exploding when the gas cap removed.
Really great for you that that beautiful coach is running so well.
Don Adams Dallas, TX
'76 26' Glenbrook, '90 Sidekick
rebuilt by R Archer, powered by J Bounds, Koba
[IMG]http://www.gmcmhphotos.com/photos/data/6109/G2.jpg[/IMG]
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| Re: [GMCnet] Clasco on the road [message #211624 is a reply to message #211620] |
Wed, 19 June 2013 13:16 |
jknezek
Messages: 1057
Registered: December 2007
Karma: 5
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I'm betting on the ethanol treatments though I don't have the science to back it up. I've also used them (Stabil Ethanol Treatment) when I'm forced to store the coach with gasahol and I've not had a problem in 90/90 days. I do try desperately to fill with pure gas that I can find locally, even if not brand name, but it's not always possible. Of course, I've never had a vapor lock problem in 7 years driving in the southland regardless of gas. Not sure why some coaches seem afflicted and others don't...
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
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| Re: [GMCnet] Clasco on the road [message #211625 is a reply to message #211622] |
Wed, 19 June 2013 13:27 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Jerry, My last trip to Fresno last month for a 49ers rally in Jackson
involved a 70 mph pass down I-5, over the Sis-kewl summit into Redding on
Chevron Regular purchased in Salem. Filled up at a Chevron in Redding and
when we got to Sacramento the old vapor lock bug bit me. Switched to other
tank, auxiliary, and climbed up to Jackson, Ca.. some symptoms present.
When we left, it was early in the day and mostly downhill. Still had quite
a bit of fuel on board. Stopped at a Tesoro station and topped off with
mid grade. Hauled butt for Redding where we spent the night. Pulled out
onto the highway at 7:15 am and headed back over the Sis-kews. Coach ran
like Crap until we got to Ashland, Or. Filled up with 92 octane ALCOHOL
FREE PREMIUM at a Tesoro station off Exit 14. Coach ran like a scalded dog
all the way home. Still have at least 20 gallons left in the tanks. I have
not had vapor lock issues before this trip. I would vote for winter gas on
a hot day. .
Jim Hupy
Salem, Or
78 Gmc Royale 403 with mechanical fuel pump and stock carb.
On Jun 19, 2013 11:10 AM, "Don Adams" <dj.adams@att.net> wrote:
>
>
>
> That is very interesting. We have had a lot of clouds the last few days.
> Are your days hot and sunny?
>
> While the large forward mounted fuel filter/water separator seems like a
> great idea. Some problems were of boiling in the tanks and pressure
> exploding when the gas cap removed.
>
> Really great for you that that beautiful coach is running so well.
> --
> Don Adams Dallas, TX
> '76 26' Glenbrook, '90 Sidekick
> rebuilt by R Archer, powered by J Bounds, Koba
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Clasco on the road [message #211627 is a reply to message #211620] |
Wed, 19 June 2013 13:52 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| glwgmc wrote on Wed, 19 June 2013 10:52 |
Correction. In my last post trying to determine why we are having no vapor lock issue I mistakenly said we were only at low altitudes. That is wrong. This morning in New Mexico on the 10 we passed over the Continental Divide and the sign said we were at 4500 feet. That is higher than the highest point on the I5, the major N/S highway on the west coast. Coming into Benson AZ a short time ago we had a long steep climb on a very hot day, stiLl with no issue. I am more and more thinking it must be either the large forward mounted fuel filter/water separator or the ethanol treatments added to each fill up. Could also be the quality brand name gas but we cannot be the only ones in the fleet doing that.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed & hand crafted
in the 1907 former Masonic Temple building
in historic Kerby, OR
Http://jerrywork.com
541-592-5360
Cell 541-499-1027
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jerry,
you also drove through Texas Canyon, between Willcox and Benson. It is the highest point on I-10 in the US. This from Wikipedia:
"The highest elevation in the US along I-10 occurs east of Tucson, 20 miles west of Wilcox, at the mile marker 320 exit for the Amerind Foundation and Museum. The west-bound lanes of I-10 briefly cross above 5000 ft."
The only times I have had vapor lock issues at higher elevations have been at the end of a long slow climb, like at the top of the mountain at Chiricahua Nat. Mon (7,500') and at Burro Mountain Homestead in NM. (6,700') I have also experienced it mostly on surface streets after getting off the freeway. Other than that, it has been at low altitudes when it is plenty hot.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Clasco on the road [message #211639 is a reply to message #211620] |
Wed, 19 June 2013 19:36 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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Jerry,
Try driving the rest of the way home without adding the ethanol treatment. Wouldn't be conclusive but would be interesting if you start having issues.
I was hoping that you would be able to report that the filter/separator is the answer. With it's large reservoir and located high and away from heat sources as it is maybe it works as a fuel cooler. Dropping the fuel temp and converting the vapor back to liquid just before it enters the carb.
I started a thread on this topic last week but no one had any real experience with fuel coolers but opinions were that simple off the shelf coolers would be ineffective.
I have no experience with fuel coolers but I'm not convinced it wouldn't work. I haven't had serious vapor lock problems. The minor occurrences I've had were overcome with my rear mounted electric pump.
Have a safe and enjoyable trip home.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] Clasco on the road [message #211674 is a reply to message #211660] |
Thu, 20 June 2013 09:20 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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Jim,
Thanks for the info.
Sounds like a properly located fuel cooler along with an electric pump mounted near the tanks should solve most vapor lock problems. Not a hugely expensive or complicated fix.
Hope some one who is consistently afflicted with vapor lock will try it and report back.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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