[Diy_efi] Donegan ECU

[Bernd Felsche]

On Friday 05 January 2007 09:33, Mike V wrote:
> From: "Bernd Felsche"
> > On Friday 05 January 2007 00:57, Steven P. Donegan wrote:

> > If the temperature in the fuel rail is a problem, then a
> > recirculating fuel pressure control system is IMNHSO a better
> > solution. In such a system, there's always "fresh" fuel that's in
> > excess to the amount required for injection from the tank flushing
> > the rail(s). The fuel tank is the cooling environment for the fuel.

> Related to this, is it okay to have the return line squirtin the
> fuel in from the top of the tank, or should it be submerged in the
> fuel?  I have a 1941 gas tank that I need to plumb a return lin
> into.

Note the last statement: "The fuel tank is the cooling environment
for the fuel."

Fuel that returns should mix well with whatever fuel is in the tank
to try to provide a "constant" temperature and hence density so that
the amount to inject (injector opening time) is easier to calculate.
Also, the cooler fuel is more dense and provides more energy per
unit volume.

-- 
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