I feel that most, if not all, of the "vapor lock" issues that we experience
today are NOT ANYTHING WRONG WITH OUR COACHES.
So trying to repair something that is not the root cause of the problem is
a fools errand at best.
In 1957, after I joined the National Guard, completed my basic
training at Fort Lewis, and was attending my first ANACTD UTRA at Yakima
Firing Center in Central Washington. Hotter than the hinges of hades, after
a day on the live fire range, we were cleaning up the 90 mm guns on our
tanks. A 3 striper sent me to the other end of the huge asphalt paved motor
pool for a bore brush with a left handed twist to clean the bore rifling in
our gun. When I got to the other end of the motor pool, I was told that
another company was using it, and I should go to their HQ and see if they
were done with it.
Well, some of you all have already figured this one out. Classic
okey-dokey. They ran my butt all over that 120° black asphalt parking lot,
looking for something that was non-existent. They all had a great laugh at
my expense.
BUT, I NEVER FORGOT THAT LESSON. I grew up a lot that summer. Learned
a bit, too.
DON'T TRY TO FIX NON-EXISTENT PROBLEMS.
Today's gasolines are not blended with the correct viscosity for a
Carburetor. They are formulated to flow through tiny, tiny openings in fuel
injection nozzles at high pressures. They, by design, are much more
volatile than yesterday's gasoline were. Hence, the lower vapor point
index, (they evaporate at much lower temps and pressures).
So, in-tank pumps that push the fuel instead of suck it, are a help.
So is re-routing the the fuel lines to cooler location.
But there is no absolute cure for reformulated fuels. Throw in the
winter/summer blends, a bit of condensed water vapor, alcohol separation,
etc. and your coach will exhibit tendencies that resemble vapour lock. High
temperatures and elevation exaggerates the problem.
Another okey-doke. This one from the E.P.A. They are planning to up
the amount of alcohol blended into the fuel to 15% instead of 10%.
They want you to get rid of gasoline dependent vehicles, and go to electric
vehicles. Guess what? Sale of Electric Vehicles dropped by 7% in 2019.
People that still can think for themselves, aren't buying them. East of the
Rockies, the majority of electricity is produced by fossil fuels and
nuclear energy. You plug in your EV, and you burn up some dinosaurs to
charge it. Quit blowing smoke in my face and telling me that it is good for
me.
RANT OFF.
Jim Hupy
Salem, Oregon
On Sat, Jan 18, 2020, 10:05 AM Fred Hudspeth via Gmclist <
> 'Agree with Emery's experience re in-tank pumps/EFI. No vapor lock at 107F
> ambient (but at only 1500' altitude) - highest temp encountered thus far
> since installation. 'Expect similar performance at 12K' elevation but with
> lower ambient temp...
>
> Fred Hudspeth
>
>
> Fred Hudspeth
> 1978 Royale (TZE 368V101335) - Tyler, TX
> 1982 Airstream Excella (motorhome) - Cooper Landing, Alaska
>
>
>
>
>
>
>
> Message: 6
> Date: Fri, 17 Jan 2020 16:05:19 -0700
> From: Emery Stora
> To: gmclist
> Subject: Re: [GMCnet] Electric fuel pump
> Message-ID:
> Content-Type: text/plain; charset=utf-8
>
> Larry
> An electric fuel pump will help not to have vapor lock but don?t think you
> never will.
> Especially at high elevations on hot days.
> The only way I have finally eliminated vapor lock was a few years ago when
> I
> installed in-tank fuel pumps.
> Emery Stora
>
>
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