Re: vapor lock

[kelly arnold <keltonm@xxxxxxxxxxxxx>]

 Well I've tryed the heat tape on the filter and lines. No good still does it. The engine compartment gets so damn hot it's got the air cleaner where I can't even touch it to take it off to see if the carb is getting fuel. Does anyone have that problem with there 440? Why does it get so hot.
Kelly

-----Original Message-----
>From: Steve Mick <micher@xxxxxxxxxxxxxxx>
>Sent: Aug 14, 2012 2:12 PM
>To: 1962to1965mopars@xxxxxxxxxxxxxxxx
>Subject: Re: vapor lock
>
>Gary, I really got a chuckle from your post----Just another reason there are 
>lawyers! LOL...............MO
>{Steve Mick}
>http://stevemick1964dodge.shutterfly.com/pictures/5
>----- Original Message ----- 
>From: "Gary H." <62to65mopar@xxxxxxxxxxx>
>To: <1962to1965mopars@xxxxxxxxxxxxxxxx>
>Sent: Tuesday, August 14, 2012 8:39 AM
>Subject: Re: vapor lock
>
>
>This is a question that has come up over time in a lot of car discussion 
>forums. There does not seem to have been any scientific experiments to prove 
>or disprove the use of wooden clothes pins as a cure. Lots of anecdotal 
>speculation though. Below is a sample:
>
>
>Heat sink
>
>Take those pins and clamp them to various places on your fuel (specifically 
>in the areas where it is getting hot and vapor locking).  In order for the 
>vapor lock to occur, it must heat the fuel and the fuel line to a 
>temperature that will turn the gasoline to a vapor.  By attaching the 
>clothes pins, you are basically creating a heat sink.  In order to heat the 
>fuel and line, it must also heat up the clothes pin.  It cannot raise the 
>temperature of the clothes pin hot enough to create a vapor lock hence the 
>problem is solved.
>http://www.carolinarovers.info/croc-stuff/tips/365-how-to-cure-fuel-line-vapor-lock
>
>Or not heat sink but otherwise:
>
>But, I don't think their actually acting as heat sinks. I say this for the 
>same arguments others have already made. Wood is not a good heat sink.
>
>I also would argue that they aren't succeeding by acting as insulation. Most 
>of the lines I've seen haven't had enough clothes pin to cover more than 1 
>or 2" of line.
>
>I would propose four different theories on why it works, but not as heat 
>sinks. I would think it works by either changing the air flow, acting as 
>weights or spacers, or "chambering" the tube.
>
>First, I had one of the engine owners tell me that the clothespins disrupt 
>the airflow either away from, along, or around the fuel line keeping it 
>cooler.
>
>Second, that they act as standoffs keeping the fuel line away from or out of 
>heated areas where it would otherwise have been without the pins.
>
>Third, and my second favorite is that they act as weights causing the line 
>to "dip" down rather than arch up so any bubbles would run to the ends of 
>the line rather than creating a bubble in the center.
>
>Fourth, which is the most complex and my favorite is that the pins create a 
>bottleneck effect within the fuel line.
>
>The ever so slight compression on the tubing creates small
>"chambers" or bottlenecks inside the rubber line which effect the behavior 
>of the vapor. Possibly percolating through each little narrow point keeping 
>the fuel moving through the line.
>
>This would explain why clothespins don't seem offer any effect on hard lines 
>or the new stiffer rubber tubing, while still working on the older, softer 
>lines available through much of the 60's and 70's.
>
>***
>
>Transpiration I'm told, same as sweat evaporating off you cools you down, 
>supposedly the wood is wicking the moisture off the outside of the metal 
>fuel line, cooling it faster.
>
>http://www.smokstak.com/forum/showthread.php?t=64217
>
>
>Vibrations from the clothes pin makes as much sense as the other 
>explanations.
>Skinned Knuckles magazine had an article (or series of articles) a few years 
>back about things that can contribute to vapor lock. One of the things 
>mentioned was to have the fuel lines all smooth, no kinks or dents to trap 
>bubbles. Also, make sure that there is a continuous slope up from the pump 
>to the carburetor. Any bubbles will then rise up the the carb and be 
>expelled from the system. If the line dips down at any point there will be a 
>high spot for the bubbles to collect and cause a problem. 
>http://forums.aaca.org/f120/vapor-lock-157015.html
>
>Thanks,
>Gary H.
>
>>  -------Original Message-------
>>  From: Eric Sturgis
>>
>>  I wonder. why it works.....anybody know why?
>
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