Other cut open tanks I have seen had a filter down there. If you examine
those photos closely you can see that the 4 metal supports that come
together in the center of the tank have been folded over at the ends
near the canter. AFAIK, this is to make room for a filter assembly
basket that snaps down into the center hole. Fuel passes through the
fine mesh outside surface of the basket and then drops down that hole
into the lowest part of the tank where the pickup is.

Here is a different photo of what was said to be an 84 tank cut open,
showing the filter basket fitted where the 4 supports are folded at the
canter.

http://images.thesamba.com/vw/gallery/pix/889180.jpg

Mark

neil n wrote:
> Thanks for those pics.
>
> The new Brazilian tank I installed looks similar. So there's no filter in
> depression at tank bottom?
>
> As per Dennis's post, I have to wonder if my high speed I-5 (70+ MPH) stall
> wasn't due to the same issue; higher engine demand, hot ambient temps, (and
> likely hotter than normal engine bay temps due my "ahem", design) all
> causing hotter than normal fuel getting pumped out the smaller ID tank
> outlet where cavitation may already have been occurring.
>
> My pump noise may well have been happening when my air cooled engine was
> still installed. With a different somewhat quieter engine, the noise may
> have become more apparent.
>
> Thanks for posting your experiences Jack. (and your reply Dennis) This may
> have shed some light on my mystery stall.
>
> Neil.

>> http://s197.photobucket.com/**albums/aa190/becida/84%20Fuel%**20tank/<http://s197.photobucket.com/albums/aa190/becida/84%20Fuel%20tank/>I found nothing inside the tank. Someone later showed me a Samba picture of
>> the tank with a big screen one the sump that mine didn't have.
>>
>>