[DeTomaso] Extra Fuel Tank?

[Tomas Gunnarsson]

Kirby,

Why are you returning the EFI fuel to the main tank instead of the swirl tank (which I assume is supposed to act as a catch tank)? If you have the LP pump sucking air in a turn you'll empty the catch tank with the EFI maximum flow into the main tank. The whole point of a catch tank is to avoid that and you normally return the EFI flow to the catch tank and de-air the catch tank into the main tank.

Tomas

> Från: Kirby Schrader <kirby.schrader at gmail.com>
> Till: MikeLDrew at aol.com
> Rubrik: Re: [DeTomaso] Extra Fuel Tank?
> Datum:  Thu, 23 Aug 2007 22:16:59 -0500

> The SPF's have the two tanks, but no bladders. Normal tanks with fuel  
> sloshing up and down when braking and accelerating.
> Both tanks hold about 10 gallons for a total of 20.
> 
> Fuel gauge is in the right tank.
> 
> They have a crossover hose which will balance the tanks that runs  
> across the car in front of the engine, but you still need to fill  
> each tank individually. You'll be standing at the pump for hours  
> waiting to fill both from one side.
> Ask me how I know....
> 
> There's no tank switch unless you install one.
> 
> I now have an EFI setup which pulls from the left tank through a  
> filter with a low pressure pump into a swirl tank.
> The HP pump pulls from the swirl tank and goes to the EFI via a filter.
> 
> Both the overflow from the swirl tank and the EFI return to the left  
> tank.
> 
> Yes, a fuel cell is certainly possible on both sides with a definite  
> reduction in overall capacity.
> 
> FWIW,
> 
> Kirby
> 
> 
> On 23 Aug 2007, at 10:05 PM, MikeLDrew at aol.com wrote:
> 
> >
> > In a message dated 8/23/07 19 54 8, shawkins777 at comcast.net writes:
> >
> >
> >> Where the gas tank on a GT40?
> >>
> >
> > GT40s use twin rubber fuel bladders which are slid into the sills  
> > (rockers),
> > effectively surrounding the driver with fuel.   Such practices have  
> > long been
> > banned from race cars, but it was common practice through the early  
> > 1970s (and
> > many drivers were burned or killed as a result).   The rubber  
> > bladders were
> > an attempt at making such a system safe.
> >
> > Coincidentally back in 2005 I posted a scan from the factory GT40  
> > parts book
> > showing the complicated fuel system layout on a GT40.   Note the  
> > twin tanks,
> > with a vertical pickup at the rear of the right (driver's) side, and a
> > horizontal pickup at the rear of the left side.   Twin fuel filler,  
> > twin fuel level
> > senders, an aircraft switch to select fuel delivery from one or the  
> > other, or
> > both tanks, single electric fuel pump, large filter, and then lines  
> > leading to
> > the Webar carbs (only one carb shown in the drawing).
> >
> > <a
> href=http://members.aol.com/mikeldrew/gt40fuelsystem.jpg>http://members.aol.
> com/mikeldrew/gt40fuelsystem.jpg</a>>
> > Mike
> >
> >
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