Adrian

All this data is contained either in my book on the 964 or in the 964 RS Service information manual from Porsche.
The 964 Carrera RS touring for a start was fitted with the double mass flywheel.
Ciao,
Adrian.

Calvaire

I have read it, Adrian. You mention the 92 lt as standard, but apparently not all RS came with it in first place.

Adrian

According the the Porsche factory issued 964 RS service information manual the 964 RS was fitted standard with a 92 litre tank. The 77 litre was NOT an option.
The fact that some of you have these tanks fitted will need to be researched by you the owners but there is no published Porsche data supporting the installation of 77 litre tanks for the basic 964 RS. There is a possibility that they were fitted at the factory but proof is required and this is found on each individual 964 RS build sheet.
You should all be aware that many RS's on the road today started life as track cars.
I suspect that what we are seeing are former track RS's which have been converted back to road legal and being sold off.
I know for a fact that a number of wrecked race cars have been rebuilt as road cars and exported out of both Switzerland and Germany.
These RS's may now be on their second or third owners since rebuild and the current owners have no real idea of the history of their RS and it is assumed it has always been a road car.
If you have a 77 litre tank fitted this is not normal but you will have to research how this may have happened.
Ciao,
Adrian.

PS: I just checked the new Porsche parts catalogue I have (a legal one).
Sorry but only the 92 litre tank is listed for the 964 RS LHD. By omission of a RHD tank part number it is possible the 964 RHD conversions may have been fitted with a 77 litre fuel tank but that is only an assumption based on omission. It certainly cannot be applied to the LHD 964 RS.

Patrik S

Adrian, are the "Porsche factory issued 964 RS service information manual " and "Porsche Service Information Technik 911 Carrera RS, WKD497610" the same document?
If so where does it say it has a 92 liter tank? The two pictures in WKD497610 shows 77 liter tanks!

pncarrerars

The Service Information Technik '92 911 Carrera RS WKD 497620 that I have makes no mention of the tank size although the only picture seems to show a 77 litre one.

Pete '92 964 RS

Adrian

The tech spec (manual I refered to), build spec and parts catalogue for the RS only declare a 92 litre fuel tank part number 964 201 021 03.
Now if any of you can find a document which provides another part number fuel tank for the 964 RS then please present it.
Until then if you have a 77 litre fuel tank fitted to a genuine 964 RS I recommend you find the build spec sheets for the serial number you own and check it out.
If you are using partial images from a training manual as justification for your argument and ignoring the written part numbers I genuinely cannot argue against that.
Ciao,
Adrian.

Here is the 92 litre fuel tank fitted into a genuine LHD 964 RS, middle is my LHD C4 with a 77 litre tank and the bottom is a C2 with a 77 litre tank.

Calvaire

The LHD 77 lt is recogniseable because of the metal strip that holds the tank is approximately at the height if the water tank. The 92lts' one is much more close to the bonnet level.

Calvaire

In my case the car used to race , but it was homologated to be driven on the road. It participated to some porche club races. The first owner bought it new here in Italy.

pncarrerars

From WKD 964 120 92 6/91 Supplement To Drivers Manual 911 Carrera RS.

Pete '92 964 RS

Adrian

I cannot see any point in continuing. You guys believe what you want. I have read through the thread and it just goes around and around.
Ciao,
Adrian.

Patrik S

But that there is only a specific partnumber for the 92 liter tank is logical. The 77 liter tank is the standard 964 part and does not need to be specified for the RS.

Adrian, is every part of an RS specified in this manual you refer to, or only specific RS ones?

When I say the RS as standard has a 77 liter tank I fall back on the "Porsche Service Information Technik 911 Carrera RS" WKD497610. In this 41 page document Porsche states every little DIFFERENCE between the RS (Basic and Touring) and the normal 964. And they have not stated any difference in gastanksize.

And:
Supplement To Drivers Manual 911 Carrera RS, WKD 96419292, Sweden, states 77 liter
Supplement To Drivers Manual 911 Carrera RS, WKD 96411092, Germany, states 77 liter
Supplement To Drivers Manual 911 Carrera RS, WKD 96412092 , England, states 77 liter

Picture is of my ex. RS 1992 Basic:

Adrian

Please obtain the build specification for your serial number from Porsche. This will tell you exactly what was installed when it was built. This applies to anyone else as well.
This is the only document that is going to provide the truth that will be believed.
In a case like this the onus is on the current owner to prove what he is saying. Such a tank would raise a red flag to me as a purchaser so some documentation might be in order. The owners manual would not be sufficient. I would require the build spec if the options label either did not declare the tank or was missing.
I am more than willing to concede to the 77 litre fuel tank being a proper RS fitment if anyone of you who claim it is normal can provide the paperwork to prove it. Not opinion but the build spec of your RSs. I cannot be fairer than that. Porsche have the build specs on file all you have to do is contact them and get it. You may have to pay for it.
Ciao,
Adrian.

PS: The part number I have posted is the single fuel tank part number allocated exclusively to the 964 RS.
If the 92 litre tank was an option it would be declared on the options label which is found in the service record manual and on the underside of the luggage compartment lid.
If the 77 litre tank was an option it would also be declared on the options paperwork.

pncarrerars

I have been curious about this fuel tank issue for a number of years now having seen numerous lhd RS with 77 litre & very few with 92 litre. Unfortunatly the comments put against parts in the parts list are ambiguous & for the 92 litre tank could mean that it was the standard part for the RS or that it was an optional part developed for the RS. My conclusion at the moment is that the RS had a standard 77 litre tank at the start of production (as stated in the manuals etc) & that later the 92 litre was fitted (as standard or as an option I cant tell). I have not yet seen a 92 litre tank in an early production RS.

Pete '92 964 RS

dove

Guys dont worry about the size of your tanks,youve got an awsome car there enjoy it!!

Calvaire

I'll try to go through porsche germany to obtain the build specs. I'm too courious now..