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Re: Why an electric fuel pump??
#21
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PackardV8
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RAA Hypothesis:

Assume that the vapor lock DOES occur in the line from tank to pump.
THEN, is vapor lock caausing a positive PRESSURE in the line or a NEGATIVE pressure???

Posted on: 2017/5/23 21:09
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#22
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PackardV8
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Anyone have an EASY access to a CUTAWAY diagraam or similar such diaagram of the INTERNAL workings of a mechanical fuel pump that is EASY enuf to post here in this thread????

Posted on: 2017/5/23 21:17
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#23
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PackardV8
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Hint:
Is it fairly common for ELECTRIC pumps to be plumbed such that the electric pump feeds DIRECTLY THRU the MECHANICAL pump??? No??? Not possible????

Posted on: 2017/5/23 21:28
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#24
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PackardV8
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NOW, let us look at the operation of the VALVE inside of the MECHANICAL pump. And determine WHICH SIDE of the pump for which PRESSUE (from boiling fuel) would cause the pump to stop pumping. Or allow fuel to STOP flowing.

Posted on: 2017/5/23 21:31
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#25
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PackardV8
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If my foggy mind still serves me well then the valves inside of the MECHAnICAL pump are NOT directly opened and closed mechanically. But rather are opened and closed by pressure/suction of the pump diaghram operation.

Posted on: 2017/5/23 21:35
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#26
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BigKev
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Please don't post 10 different posts to get one thought out. It's annoying, and drives others peoples posts off the page. You pretty much post jacking at that point.

I've already pointed out that vapor lock can occur anywhere in the system where the fuel can boil relevant to temp and pressure.

I'm pretty sure disc brakes and electronic ignitions are not a passing fad. The last 30+ years have debunked that.

Posted on: 2017/5/23 23:42
-BigKev


1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog
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Re: Why an electric fuel pump??
#27
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PackardV8
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Yeah. ok.
Just one more:
Watch the first 3 minutes of it and the maybe the last 1 minute.

https://youtu.be/cadNfSNi_Oc

Posted on: 2017/5/24 11:08
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#28
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Wesley Boyer
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So just as I thought, the clothes pins on the line means less metal surface area to heat up, so cooler fuel. Makes sense since wood is a good insulator of heat.
Wes

Posted on: 2017/5/24 15:46
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Re: Why an electric fuel pump??
#29
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PackardV8
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Yeah, clothspins. BUT, 95% of owners would try to put the cloths pins on the fuel line between tank and pump Then claim "mythbusting" when it doesn't work. LOL. LOL. LOL.

Posted on: 2017/5/25 7:48
VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245
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Re: Why an electric fuel pump??
#30
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BigKev
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Another thread beaten to death... SMH

Posted on: 2017/5/25 13:00
-BigKev


1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog
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