Electric fuel pumps and vapor lock

[Tinker]

I agree with the non eth fuel.

I had a 1942 that was always struck by the pull up to the burger joint and wouldn't start. It ran on a electric fuel pump by the tank. It was a coil issue turns out. Removed the loud electric pump and went with a standard mechanical and a good coil.

If you are using a 94. Are you dumping fuel through a bad power valve? I stopped using 94s for strom 97s. No idea really... Best of luck!

[Tinker]

If you want to cool down the carb put some block off tins under the intake cross over. It is designed to warm the carburetor.

[SoCalCoupe]

Originally Posted by flatford8

I always thought the idea behind the clothes pins was they acted like cooling fins when the air blew thru them. They probably worked better as a conversation starter…… Mark

I'm with you Mark. There's always more to learn but wood's a better insulator than conductor. Poor electrical conductors are usually poor heat conductors. Not too plausible that a wooden cloths pin would conduct heat away from a fuel line. On the other hand, it seems quite plausible that a wooden cloths pin would insulate a fuel line.

[tomcarman]

I have to chuckle to myself in memory of my Dad and my Uncle for many fond memories of my youth. In post #8 the clothes pin memory resurfaced from when I was just a kid. Apparently by some of the responses it is not unheard of so I don't know if there's truth to it or just kidding by them as stated in post #11. In addition to the rubber lobed camshaft there was also the metric crescent wrench, the left handed screw driver, the drill bit that drilled a square hole, the external combustion engine and unrelated but equally impressive to gullible youngsters the infamous Jackalope, with pictures to prove it.

[GB SISSON]

Is a steam engine an external combustion engine? Is that why they call ours an 'internal' one. On the same note I saw a Jackalope just yesterday. Dang things can really move so I couldn't get a picture. And remember my sticking carb float? I got sick of getting out, lifting the hood and tapping the fuel inlet with a wrench. Inspired by Rube Goldberg's 'butt kicking machine' I fabricated an integrel spring loaded hammer with a rod through the dash so I could tap it accurately from the driver's seat. Picture of that one tomorrow.

[ford38v8]

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Originally Posted by GB SISSON

Is a steam engine an external combustion engine? Is that why they call ours an 'internal' one. On the same note I saw a Jackalope just yesterday. Dang things can really move so I couldn't get a picture. And remember my sticking carb float? I got sick of getting out, lifting the hood and tapping the fuel inlet with a wrench. Inspired by Rube Goldberg's 'butt kicking machine' I fabricated an integrel spring loaded hammer with a rod through the dash so I could tap it accurately from the driver's seat. Picture of that one tomorrow.

I think old Rube was inspired by Humphrey Bogart to kick his boiler on the African Queen. Remember, He had an assistant at one time who dropped a screwdriver into the valve.

[Tinker]

I was more a Lauren Bacal fan. She wouldn't dropped the screw driver

[deuce_roadster]

Back to Gary's observation--The electric pump PUSHES gas up to the carb where the mechanical pump SUCKS it up from the tank. As others have noted, at various temperatures the gas at the mechanical pump boils, making air pockets and cannot pump any gas until it cools off. That is the reason electric pumps are placed as close to, or into the gas tank.

[SoCalCoupe]

Originally Posted by GB SISSON

Is a steam engine an external combustion engine? Is that why they call ours an 'internal' one.

Actually, a gas turbine is quite correctly referred to an external combustion engine. Guess that means a steam engine would be too.

[Tinker]

Its a motor, how ever it's powered really. Air in Air out pushing a piston. Electric motors is another discussion.


But.. The main difference between internal and external combustion engine is that in internal combustion engines, the working fluid burns inside the cylinder, whereas in external combustion engines, combustion takes place outside the cylinder and heat is then transferred to the working fluid.


So on a steam engine the fire pressure is built in a separate tank and supplied to the cylinder vs a internal gas motor that the combustion happens inside the cylinder. Very similar systems mechanically but different.

[cas3]

When pouring too much gas from a jug into a carburetor on a questionable motor I've had some " external combustion " before .

[Tinker]

Originally Posted by deuce_roadster

Back to Gary's observation--The electric pump PUSHES gas up to the carb where the mechanical pump SUCKS it up from the tank. As others have noted, at various temperatures the gas at the mechanical pump boils, making air pockets and cannot pump any gas until it cools off. That is the reason electric pumps are placed as close to, or into the gas tank.

There are very different types of pumps as we know. The airtech are technically a push pull pump. Meaning they push but let things drain back under pressure. Like a turtle sponge heart. Why they are rated to pressure and you can use them as an assist with a mechanical. Free flow.

I suppose if you consider the location of the pump, one would pull or one would push. The mechanical has check valves however to restrict return.

Airtechs are great. Rotory Carters are a different animal. Neat conversion.

Have not needed one personally. Somehow




.

[koates]

Tinker, the electric pumps are named AIRTEX. Regards, Kevin.

[corvette8n]

I went to a car show in Bennington VT. And a guy with a shoebox flathead had about an inch thick of aluminum foil wrapped around his fuel line, he said he doesn’t have a vapor lock problem anymore.