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Hi Chris,<br>
<br>
LP will boil (vaporize) at -44° so until your ambient temperature is
below that it is vaporizing. Heating the tank will increase the
liquid and vapor pressure in the tank but it is still liquid, not
vapor, that is plumbed to a cold regulator, or vaporizer if they
have one, where the vaporization takes place for the engine. I can't
see that increase tank temperature would solve the issue.<br>
<br>
In 1981 I bought a truck with dual fuel capability. The J-valve
regulator had liquid heater lines from the coolant system to heat
the LP liquid at the point of vaporization. The tank was in the bed
and never heated. In very cold weather I had to start the engine on
gas then switch to LP after hot water hit the regulator. All worked
well with a warm regulator.<br>
<pre class="moz-signature" cols="72">
Larry </pre>
<div class="moz-cite-prefix">On 4/3/15 10:56 AM, Chris Mason wrote:<br>
</div>
<blockquote
cite="mid:CAG6C1qmMpoF=r-dKDzPzEYbKce2zsvMOGdkaXLTgT2Jje4MRUw@mail.gmail.com"
type="cite">
<div dir="ltr">Heating the regulator won't help if the propane is
not vapourizing. You would need to heat the tank.
<div>However, you do not need to heat it very much, just enough
to let it vapourize. Think about putting it somewhere with a
little heat, or burying it.</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Apr 3, 2015 at 1:51 PM, Larry <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:larry@starlightsolar.com" target="_blank">larry@starlightsolar.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"> About the carb heat
idea...LP is a liquid at -44°F. The liquid does not
combust, it must be vaporized. As the ambient temperature
drops closer to the LP liquid temperature, there would be
a reduction in how fast liquid is vaporizing and therefor
a reduction in volume. What you need in cold weather is
enough volume to maintain at least 11" wc while cranking
or running the engine. You can test the vapor pressure
with a manometer while cranking to verify if this is the
problem. <br>
<br>
If this is the reason the engine does not run, my thoughts
are that heating the LP regulator would be much more
economical from an energy standpoint, than heating the
whole engine block. Perhaps an insulated enclosure with
silicone heaters appropriately attached would work. They
are available in many DC or AC and at various voltages.<br>
<pre cols="72">Larry Crutcher
Starlight Solar Power Systems
</pre>
<span class=""></span><br>
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