Re: Carter Fuel Pump HELP!!
[Re: lewtot184]
#2977347
10/22/21 07:06 PM
10/22/21 07:06 PM
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Joined: Jun 2014
Posts: 1,381 VA
dragon slayer
pro stock
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pro stock
Joined: Jun 2014
Posts: 1,381
VA
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It is a pulse damper to assist the air dome diaphragm from collapsing too much on the pressure stroke. Not all pumps have it. When you say leak, what type of leak? Internal into the isolated chamber or external to the pump.
Last edited by dragon slayer; 10/22/21 07:08 PM.
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Re: Carter Fuel Pump HELP!!
[Re: dragon slayer]
#2977674
10/23/21 06:12 PM
10/23/21 06:12 PM
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Joined: Oct 2007
Posts: 743 New York
R/T1968R/T
OP
super stock
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OP
super stock
Joined: Oct 2007
Posts: 743
New York
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All surfaces look good. Should that middle area be machined? It looks as cast. I think gas spilled into that chamber when it was disassembled.
Last edited by R/T1968R/T; 10/23/21 06:14 PM.
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Re: Carter Fuel Pump HELP!!
[Re: lewtot184]
#2977804
10/24/21 09:50 AM
10/24/21 09:50 AM
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Joined: Jan 2007
Posts: 685 pennsylvania
poboyengineering
mopar
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mopar
Joined: Jan 2007
Posts: 685
pennsylvania
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I was going to post this same question about the sponge. Since not all pumps have it, is there a downside or advantage to leaving it out?
It may be ugly, but it sure is slow.
Girls comb their hair in rear view mirrors and the boys try to look so hard....
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Re: Carter Fuel Pump HELP!!
[Re: poboyengineering]
#2977833
10/24/21 11:16 AM
10/24/21 11:16 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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I was going to post this same question about the sponge. Since not all pumps have it, is there a downside or advantage to leaving it out? all carter 3 valve pumps i've messed with have the sponge. i take my pumps apart and re-work them and don't put the sponge back in with no adverse effects. i say keep it if you want, remove it if you don't; hasn't made any issues one way or the other for me.
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Re: Carter Fuel Pump HELP!!
[Re: lewtot184]
#2978132
10/25/21 09:56 AM
10/25/21 09:56 AM
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Joined: Jun 2014
Posts: 1,381 VA
dragon slayer
pro stock
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pro stock
Joined: Jun 2014
Posts: 1,381
VA
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I was going to post this same question about the sponge. Since not all pumps have it, is there a downside or advantage to leaving it out? all carter 3 valve pumps i've messed with have the sponge. i take my pumps apart and re-work them and don't put the sponge back in with no adverse effects. i say keep it if you want, remove it if you don't; hasn't made any issues one way or the other for me. If you are dealing with original fp from the 60s and early 70s you won't see that foam. Later version and the 6903/4862 you will, but not always.
Last edited by dragon slayer; 10/25/21 09:56 AM.
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Re: Carter Fuel Pump HELP!!
[Re: dragon slayer]
#2978157
10/25/21 11:44 AM
10/25/21 11:44 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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I was going to post this same question about the sponge. Since not all pumps have it, is there a downside or advantage to leaving it out? all carter 3 valve pumps i've messed with have the sponge. i take my pumps apart and re-work them and don't put the sponge back in with no adverse effects. i say keep it if you want, remove it if you don't; hasn't made any issues one way or the other for me. If you are dealing with original fp from the 60s and early 70s you won't see that foam. Later version and the 6903/4862 you will, but not always. factory 2 valve pumps don't have the chamber so a sponge couldn't be installed.
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Re: Carter Fuel Pump HELP!!
[Re: dragon slayer]
#2978274
10/25/21 03:50 PM
10/25/21 03:50 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Of course. I am talking about rebuild able pumps. 4024, the 2500 series, even very early 6903. Plus the marine pumps. I have disassembled and documented many of the Carter orig pumps. Cast number, part numbers, orientation, volume, spring pressures etc... what are the spring pressures?
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