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Ove Ove is offline
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Arrow Anyone have pictures of the inside of a CIS fuel tank?

Im curious about the sump and the baffles that prevent the fuel from sloshing and splashing around in the tank.
Id like to see what it looks like in there without cutting up my own tank

It looks like I have a fuel delivery problem and I think its caused by dirt and rust from the fuel tank.
I have changed the filter in the engine bay and will take a look at the screen filter in the fuel tank this weekend.
There are lots of threads on the subject, but I couldnt find one with pictures of the tank internals.
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Ove
'77 911S targa
Old 03-09-2007, 02:11 AM
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Remove the fuel level sender, get a small flash light and look in!
Old 03-09-2007, 04:51 AM
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Ove Ove is offline
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Quote:
Originally posted by Ryce Stallings
Remove the fuel level sender, get a small flash light and look in!
I've already done that.
I have also done a search here on the BBS, but found no pictures.

Here are some drawings and a description posted by Grady Clay in this thread: I need the Greatest Minds of the Planet on this 73.5 issue.



" Dr. Ing. h.c. F. Porsche A.G.


1 Fuel tank
2 Whirl pot
3 Baffle plates
4 Fuel filter (screen)
5 Return lines
6 Admission line (supply)
7 Filter screw
8 Admission holes

The bottom of the fuel tank is provided with a spiral
whirl pot (2), incorporating a [screen] filter (4). The
fuel, being conveyed into the whirl pot by the fuel
pump via the pressure valve of the fuel metering
distributor and the return lines, is set into spiral
movement and is taken in again by the pump via
the [screen] filter (4) and the admission lines. The
whirl pot (2) is flanked by baffle plates, which are
perforated to let the fuel enter the whirl pot by means
of injector-type admission holes (8).

The system prevents air from being taken in which
would lead to misfirings of the CIS engine.
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Old 03-09-2007, 05:42 PM
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Ove,

This thread had [at one time] the pics you are looking for ...

1973 911-T (CIS) Fuel Tank Exposed

Perhaps you could PM or email the originator for the missing pics.
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Old 03-09-2007, 05:56 PM
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Ove Ove is offline
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Warren,

I have sent a PM to Paulo who posted the pictures. Thanks for your suggestion
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Old 03-09-2007, 06:12 PM
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From deep in the Pelican Parts 911 archives:

1973 911-T (CIS) Fuel Tank Exposed
Old 03-09-2007, 06:25 PM
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Quote:
Originally posted by Early_S_Man
Ove,

This thread had [at one time] the pics you are looking for ...

1973 911-T (CIS) Fuel Tank Exposed

Perhaps you could PM or email the originator for the missing pics.
Warren,

Here are those pictures. I replaced the spaces with a %20 to get them to come up.









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Last edited by HarryD; 03-09-2007 at 08:06 PM..
Old 03-09-2007, 08:00 PM
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Ove Ove is offline
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Thanks
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Old 03-09-2007, 10:57 PM
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This is a little off topic but I will tell my tail since it is somewhat related. I just had a SC gas tank reconditioned. It ended up to be quite a big deal. I thought they would chemicaly clean it and that would be it. They cut a good sized hole to epoxy coat the inside and reweld the baffold. It turned out OK but purchasing a used tank and having it reconditioned cost more than NEW.

Performance Products sells a NEW reproduction for just a little over $400. I will go that way if the need rises in the future
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Old 03-09-2007, 11:02 PM
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so the center of that orange thing is where the big drain plug fits in? that would explain the screen on the drain plug i guess.

it appears on my tank (just back from being boiled) that the plastic swirly thingy is broken. not only that but the lid my have come off...

how necessary is this plastic thingy and has anybody sourced a replacement?

final question: how big a deal is it to cut a hole in the tank and then reweld it shut?
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Well i had #6 adjusted perfectly but then just before i tightened it a butterfly in Zimbabwe farted and now i have to start all over again!
I believe we all make mistakes but I will not validate your poor choices and/or perversions and subsidize the results of them.
Old 05-11-2007, 11:49 AM
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ove or berettafan, did you get your tanks fixed? i am having problems with mine and would like to what you did.
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Old 01-10-2008, 08:01 AM
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took the tank to a Renu franchise and they removed the old swirl pot and replaced with what i THINK was a coffee can.
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Well i had #6 adjusted perfectly but then just before i tightened it a butterfly in Zimbabwe farted and now i have to start all over again!
I believe we all make mistakes but I will not validate your poor choices and/or perversions and subsidize the results of them.
Old 01-10-2008, 07:10 PM
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I spent $250 for a good used tank and $350 to have it reconditions/cleaned. I wish I would have just purchased a new reproduction

http://www.***************/productpage.aspx?pid=109223&cid=10&sid=232
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Old 01-10-2008, 07:35 PM
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