Author Topic: fuel pump question  (Read 1193 times)

Offline Scat Pack Fever

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fuel pump question
« on: January 23, 2011 - 08:25:14 AM »
This is a dumb question, but what connection goes to the carburetor? The threaded connector or the slip on connector?




Offline LAA66

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Re: fuel pump question
« Reply #1 on: January 23, 2011 - 11:10:13 AM »
 The threaded end goes to the carb. You can use a section of 5/16" or 3/8" preflared brakeline and bend it to fit the application.

Offline Scat Pack Fever

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Re: fuel pump question
« Reply #2 on: January 23, 2011 - 11:34:40 AM »
Cool! Thanks! I am guessing I shouldn't use rubber fuel line? I have the connectors that thread into the carb and the feul pump that the fuel line slips on. Or should I use straight brake line and no rubber gas line?

Offline Chryco Psycho

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Re: fuel pump question
« Reply #3 on: January 24, 2011 - 05:10:10 AM »
from the factory there is a rubber line approx 8" from the line on the frame to the fuel pump on the engine to allow movement & 2 short pieces of rubber to accomadate the fuel filter on the way up to the carb . The filter should NEVER be installed before the fuel pump

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Offline Scat Pack Fever

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Re: fuel pump question
« Reply #4 on: January 24, 2011 - 08:00:20 AM »
Cool! Thanks!

Offline bandt

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Re: fuel pump question
« Reply #5 on: January 24, 2011 - 11:41:24 AM »
Sorry if this is kind of a hijack but why is that Neil?

Offline Scat Pack Fever

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Re: fuel pump question
« Reply #6 on: January 24, 2011 - 02:19:52 PM »
No Biggie! I was wondering the same thing.

Offline Aussie Challenger

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Re: fuel pump question
« Reply #7 on: January 28, 2011 - 02:59:42 PM »
The filter should NEVER be installed before the fuel pump
:iagree:  If filter is installed before the pump when it starts to block/stop dirt it will restrict flow quickly because there is only atmospheric pressure pushing fuel through it, plus the filter itself can cause a restriction as well. Whereas if on pressure side it then has full pump pressure to over come restrictions.   :2thumbs:
Dave

Offline Scat Pack Fever

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Re: fuel pump question
« Reply #8 on: January 28, 2011 - 03:42:36 PM »
 :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs: :2thumbs:

Offline dodj

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Re: fuel pump question
« Reply #9 on: January 28, 2011 - 08:04:32 PM »
:iagree:  If filter is installed before the pump when it starts to block/stop dirt it will restrict flow quickly because there is only atmospheric pressure pushing fuel through it, plus the filter itself can cause a restriction as well. Whereas if on pressure side it then has full pump pressure to over come restrictions.   :2thumbs:
Looks like I gotta move my fuel filter. :banghead:

Thanks for the info CP, Aussie  :2thumbs:
Scott
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Offline Chryco Psycho

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Re: fuel pump question
« Reply #10 on: January 30, 2011 - 03:18:24 PM »
Exactly as Aus said , you have a prefilter in the fuel tank & anything that can get through that will nto hurt the fuel pump , you always want the pump to push fuel through the filter , it is far more effective than trying to pull through a filter ! If you like being stranded with fuel starvation problems just put the filter on the suction side instead of the pressure side !!

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Offline usraptr

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Re: fuel pump question
« Reply #11 on: January 30, 2011 - 04:14:06 PM »
Another reason you don't want to run all rubber gas line is the possibility of vapor lock.  Back in the day, I broke the metal fuel line my my wife's '67 Cougar with a 390.  I replaced it with rubber gas line and had problems with vapor lock on hot days.  Apparently the rubber gas line doesn't keep the fuel as cool as the metal lines do.  FYI.
1970 Plymouth 'Cuda.  Matching numbers 440 U Code, 4 speed pistol grip, Rallye dash, AM 8 Track, Shaker hood, 15 inch rallye wheels, Dana 60 4.10, Super Track Pak.  One of 134 - 440 "U" coupes codes built in 1970 and one of 100 - 440 Super Track Paks built in 1970.

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"usraptr" = United States raptor - bird of prey = United States Bald Eagle.  FYI, somebody else thought of it first so I had to drop the "O" in raptor.

Offline LAA66

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Re: fuel pump question
« Reply #12 on: February 02, 2011 - 10:29:30 PM »
This is a dumb question, but what connection goes to the carburetor? The threaded connector or the slip on connector?

 As a  :2cents: note; those autopart store pumps don't last very long. Especially if the car sits for extended peroids of time. Just replaced one with less then 2000 miles on it. Luckly it happened at home base so toeing wasn't necessary  ;).