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andk5591
Samba Member
Joined: August 29, 2005
Posts: 16758
Location: State College, PA
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 Posted: Fri Mar 23, 2018 5:40 am Post subject: Re: At what pointdoes stacking fuel pump gaskets become detrimental? |
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related.....does the WW kit have the correct spring? I asked when I ordered the last rebuild kit (havent used it yet) and they said they were not aware of a problem.
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wcfvw69 
Samba Purist
Joined: June 10, 2004
Posts: 13389
Location: Arizona
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| Posted: Fri Mar 23, 2018 6:22 am Post subject: Re: At what pointdoes stacking fuel pump gaskets become detrimental? |
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| andk5591 wrote: |
| related.....does the WW kit have the correct spring? I asked when I ordered the last rebuild kit (havent used it yet) and they said they were not aware of a problem. |
There new main diaphragm assembly they sell with the Effbe on the diaphragm material has the correct spring assembly. It's as good as a NOS Effbe diaphragm.
However, if you're rebuilding a square top, many parts in the kit are incorrect. The outlet valve retainer is too small. The upper diaphragm spring is a bit too long so I reuse the originals.
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kreemoweet
Samba Member
Joined: March 13, 2008
Posts: 3899
Location: Seattle, WA
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| Posted: Sat Mar 24, 2018 11:05 am Post subject: Re: At what pointdoes stacking fuel pump gaskets become detrimental? |
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Frank Bassman
Samba Member
Joined: July 01, 2012
Posts: 894
Location: Miami
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| Posted: Wed Jul 18, 2018 11:15 am Post subject: Re: At what pointdoes stacking fuel pump gaskets become detrimental? |
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Guys, wanted to update this thread. I took measurements of the pressure put out by an original square top fuel pump rebuilt using the wolfsburg west kit, this is the kit AFTER they adressed the quality issues that popped up before. The main diaphrahm IS effbe.
2.5 ish lbs. Jives well with my dual solexes. I did rig a "bleed off" line for the pressure between pump and carbs to be relieved to the pump inlet side of the circuit. (Low pressure, tank to pump side.)
-Frank |
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clonebug
Samba Member
Joined: January 29, 2005
Posts: 4027
Location: NW Washington
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| Posted: Wed Jul 18, 2018 1:39 pm Post subject: Re: At what pointdoes stacking fuel pump gaskets become detrimental? |
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I ran at least 5 gaskets and a homemade shim on my blow thru carb turbo to get the cruise pressure down to 2.5 lbs.
I then boost referenced the bottom of the pump and ran it for two years and up to 13 lbs boost.
I never noticed a fuel delivery issue caused by the pump volume.
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