Rino wrote:

> My installation has the two pumps in parallel. Either pump gives me a
> pressure of 40 psi.  When I switch both pumps I get a pressure of 55
> psi.  That pressure difference would affect fuel flow at the injectors.
> I do not know if it is a good thing of not. because of the pressure
> difference I plan on using one pump only at a time.

Corky Bell wrote in "Maximum Boost" that "Fuel flow changes through a nozzle
are proportional to the square root of the pressure change across the
nozzle." p 92

Barry Gardner
Wheaton, IL