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| [GMCnet] Eliminating Vapor Lock [message #254772] |
Tue, 08 July 2014 20:51  |
glwgmc
Messages: 1014
Registered: June 2004
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Before doing anything else try adding any brand of ethanol conditioner to your fuel in whatever dose is indicated. We found that alone has been enough to virtually eliminate vapor lock issues in both our 78 Royale with new SandJ 455 and in our 77 Clasco with stock 455. We drive a lot in the heat and altitude of the west. Without the ethanol conditioner we vapor lock big time. With it, seldom if ever. Just drove 300 miles today up the I5 at close to 100 degrees climbing five passes and not a hint of vapor lock using only the stock mechanical fuel pump in the Clasco. I prefer Archoil ethanol conditioner, but have used several brands with good success.
The Royale has a Patterson carb and distr while the Clasco has a Bounds carb and distributor.
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
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Date: Tue, 08 Jul 2014 15:13:37 -0600
From: Jeff Marten
Subject: [GMCnet] Eliminating Vapor Lock
To: gmclist@temp.gmcnet.org
Message-ID:
Content-Type: text/plain; charset="utf-8"
The Royale has a bit of vapor lock when the ambient temp is over ~85*. Once the ambient temp drops into the 70's there is no issue. A PO has
installed an insulated fuel line from the fuel pump to carb. I'm contemplating installing a bypass from the carb back to the tank to keep the fuel
moving.
However, I just saw some info on Bdub's pages about vapor lock and using the Carter kit. Assume this has two one-way valves to recirc/bypass the
fuel.
How well do these fare against vapor lock?
Alternatively, I have a couple good spare Holley red pumps, and could install one without the recirc/bypass. Any real difference in functionality?
Not looking to do anything more intrusive or costly at this time; too many higher-priority projects this year.
--
1978 Royale
Side bath w/rear dinette
1964 Falcon 'Vert
1980 Bradley GTE
1996 GMC K2500 Suburban
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Eliminating Vapor Lock [message #254784 is a reply to message #254772] |
Tue, 08 July 2014 23:04  |
cbryan
Messages: 451
Registered: May 2012
Location: Ennis, Texas
Karma: 3
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[quote Jerry Work wrote on Tue, 08 July 2014 20:51]Before doing anything else try adding any brand of ethanol conditioner to your fuel in whatever dose is indicated. We found that alone has been enough to virtually eliminate vapor lock issues in both our 78 Royale with new SandJ 455 and in our 77 Clasco with stock 455. We drive a lot in the heat and altitude of the west. Without the ethanol conditioner we vapor lock big time. With it, seldom if ever. Just drove 300 miles today up the I5 at close to 100 degrees climbing five passes and not a hint of vapor lock using only the stock mechanical fuel pump in the Clasco. I prefer Archoil ethanol conditioner, but have used several brands with good success.
The Royale has a Patterson carb and distr while the Clasco has a Bounds carb and distributor.
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
,,,,,,,,
Date: Tue, 08 Jul 2014 15:13:37 -0600
From: Jeff Marten
Subject: [GMCnet] Eliminating Vapor Lock
To: gmclist@temp.gmcnet.org
Message-ID:
Content-Type: text/plain; charset="utf-8"
The Royale has a bit of vapor lock when the ambient temp is over ~85*. Once the ambient temp drops into the 70's there is no issue. A PO has
installed an insulated fuel line from the fuel pump to carb. I'm contemplating installing a bypass from the carb back to the tank to keep the fuel
moving.
However, I just saw some info on Bdub's pages about vapor lock and using the Carter kit. Assume this has two one-way valves to recirc/bypass the
fuel.
How well do these fare against vapor lock?
Alternatively, I have a couple good spare Holley red pumps, and could install one without the recirc/bypass. Any real difference in functionality?
Not looking to do anything more intrusive or costly at this time; too many higher-priority projects this year.
--
1978 Royale
Side bath w/rear dinette
1964 Falcon 'Vert
1980 Bradley GTE
1996 GMC K2500 Suburban
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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[/quote]
Jerry,
This is really interesting. Adding a conditioner to E10 to stop vapor lock, adding if needed. If no vapor lock is anticipated, the no need for the conditioner, but if we have a bottle or two we can stop by the side of the road and put some in if we do have the beginnings of trouble, it might be something handy in the bag of tricks to get us up and out of a sticky situation. I don't think anyone but JimK would reach out of the toll window, open the fill cap and pour in the bottle while driving up a hill! Thanks for the idea. This one is pretty easy to test, it seems. After it mixes in the tank and the vapor lock disappears, it would be a great testimonial to the product. The only thing that troubles me is the claim some make that it increases gas mileage significantly. Can't figure how that works. Maybe they were fuel injected and knock retarded, and the additive caused less knock, so the engine operated with no knock retard and efficiency was increased. This seems kind of far fetched, as ethanol is supposed to have anti-knock properties by itself. So, the claims it makes on fuel mileage seem spurious to me, but the anti-vapor lock property seems invaluable to the community, though it isn't claimed in the advertising I saw. Some outboard motor companies recommend use of the conditioner when using E10.
Best,
Carey Bryan
Carey from Ennis, Texas
78 Royale, 500 Cadillac, Rance Baxter EFI.
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| Re: [GMCnet] Eliminating Vapor Lock [message #256223 is a reply to message #254772] |
Wed, 23 July 2014 10:16 |
Jeff Marten
Messages: 199
Registered: August 2013
Karma: 1
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Senior Member |
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Yep, but they frown on left turns on red.
> From: powerjon@chartermi.net
> Date: Wed, 23 Jul 2014 11:10:57 -0400
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Eliminating Vapor Lock
>
> You can make a right turn on red in Colorado too!
>
> According to CRS 42-4-604, one may make a right turn on red if: - they come to a complete stop - they yield to pedestrians - they yield to other traffic legally using the intersection - no signs are posted otherwise (for example, “no turn on red")
>
> JR Wright
> 78 Buskirk Stretch
> 75 Avion
> Michigan
>
> On Jul 23, 2014, at 10:37 AM, Jeff Marten wrote:
>
>> Took her for a spin yesterday afternoon to check for vapor lock (or hopefully lack-of). Temp was mid-80s at my house (7300ft) and upper 80s (~6500ft) where I drover her. She ran like a top even with a couple of extended stoplights (whaddya mean I don't get a turn arrow!??! LOL). I'll give her an extended drive during the afternoon heat this weekend, and I'll make sure a large part of the drive entails many stops.
>> Now to order some DuraCool so I can reduce the sauna effect. Either that or build some cool front shades to keep the sun out similar to 'The Gauntlet' bus.
>>
>
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1985 Gulf Stream 34' Sun Stream
1964 Falcon 'Vert
1980 Bradley GTE
1999 Chevy Tahoe
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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| Re: [GMCnet] Eliminating Vapor Lock [message #256251 is a reply to message #254772] |
Wed, 23 July 2014 12:36 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Before doing anything else try adding any brand of ethanol conditioner to your fuel in whatever dose is indicated. We found that alone has been enough to virtually eliminate vapor lock issues in both our 78 Royale with new SandJ 455 and in our 77 Clasco with stock 455. We drive a lot in the heat and altitude of the west. Without the ethanol conditioner we vapor lock big time. With it, seldom if ever. Just drove 300 miles today up the I5 at close to 100 degrees climbing five passes and not a hint of vapor lock using only the stock mechanical fuel pump in the Clasco. I prefer Archoil ethanol conditioner, but have used several brands with good success.
""
Jerry, you have my curiosity up. I don't see Archoil Ethanol conditioner but I see a couple of Archoil products that could be it--what is it specifically called on the label? Thanks.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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