[T3] Update with a Bowl Full of Rust Flakes

SCS Crewcab scscrewcab at bellsouth.net
Sun Jul 24 18:00:53 PDT 2011


Pardon me, Dave, but I have two FI tanks and they don't look anything 
like that diagram. I think that may be a Type 34 only design.



On 7/24/2011 6:38 PM, Dave Hall wrote:
> You can see a diagram on this webpage, comparing the carb tank and the FI
> tank.
>   http://home.clara.net/hallvw/fuelsend.htm
>
> I've heard that all tanks from about '68 have the same internal cup, but not
> the return nozzle, obviously, as only the FI models (ie most USA cars) have
> the fuel return pipes.
>
> Dave.
> UK VW Type 3&4 Club
> ===================
>
> -----Original Message-----
> From: type3-vwtype3.org-bounces at lists.vwtype3.org
> [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
> Sent: 24 July 2011 02:57
> To: type3 at vwtype3.org
> Subject: Re: [T3] Update with a Bowl Full of Rust Flakes
>
> On 23 Jul 2011 at 18:46, SCS Crewcab wrote:
>
>> What passages are you referring to?
> The FI tank has a sort of "cup" welded to the inside of the tank.
> That cup has a channel which leads under it, to the return line port.
> Returning fuel drags fuel from the main part of the tank thru that channel
> and into the "cup." So, when the tank is close to empty, the "cup" will
> remain full.
>
> In essense, this utilizes the return flow of the FI pump to scavenge gas
> from the main compartment and put it into the cup that the pump draws from.
>
> If that small passage under the cup is blocked, the only way for gas to get
> into the cup and to the pump is over the top of the cup. This means that
> once the tank is down to about 3/8 full, the pump will run out of gas.
>
> It's a system that works really well, unless you mess it up.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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