Help me identify this fuel tank.

[NorthernThrux]

This tank was removed from my 1973 911S during restoration as it was deemed not original/incorrect for the car. I had been under the impression, based on two noted experts that this is a 1973.5 CIS tank and had advertised it as such. But I have received some credible PMs with links to pictures that suggest that this is in fact not the case. The 73.5 CIS tank had the fuel lines much closer together than this.

So the question is, what year/models does this actually belong to ? It's in excellent shape and I want to sell it, but I don't want to misrepresent it.

thanks
Ravi

[M_deJong]

I thought the big center mounted strainer cover was characteristic of CIS tanks. That + full size spare = 73.5T doesn't it?

[NorthernThrux]

That's what I thought, but see http://forums.pelicanparts.com/porsc...k-exposed.html and http://forums.pelicanparts.com/porsc...3-5-issue.html

However, I have noted references to early and late 73.5 CIS cars, and its possible the late cars had my tank.

Ravi

[M_deJong]

Thanks for those links, I always wondered what was inside the tank.

Looking at the 72+ service manual supplement, pgs 2.4-1/1 & 2.4-1/4 the bottom of your tank looks like what is shown for 1976 with the fuel pump at the tank. Angled side outlet, with a concave relief area in the tank sheetmetal for mounting of the pump between the tank and cross member. Is it possible that there was a full size spare/small tank option in 1976+?

Are we sure its not the right tank for your car? Did MFI cars keep the MFI tank after CIS was introduced? I think your car is Feb 73 from other posts, which is post-cis-on-T's timeframe.

What we know for sure: CIS tank for front fuel pump and full size spare.

Seems to be some advantage to having the swirl pot even with MFI: http://www.early911sregistry.org/for...-911S-vs.-911T

[ESully]

I have done some searching on Pelican. I found a few others that are similar. Nothing definite though. Would a late model MFI from 1973 have used this tank once the fuel starvation was noticed in the CIS cars? Fuel pump was located in the rear on 1973.5 cis.
Could there have been 2 suppliers depending on where it was assembled? My car was built in July of 1973 and has the center fuel lines. According to my id numbers my car was built at the Porsche factory. Were any built in 1973 by Karmann?


http://s709.photobucket.com/albums/w...DSC00146-1.jpg
http://forums.pelicanparts.com/porsc...onversion.html
http://forums.pelicanparts.com/porsc...-gas-tank.html
http://forums.pelicanparts.com/porsc...-gas-tank.html

[M_deJong]

That last Pelican link looks just like Thux's tank. I didn't think about 912's. What about a 1976 912E? That could have used the swirl pot tank in a 62 liter configuration?

Nope, 912E is listed as having 80 liter tank.