OK i see what you mean now..Also found this article which confirms what you say,
INCREASING THE FUEL FLOW RATE
You can increase the fuel flow rate by installing a larger fuel pump or by installing a second fuel pump. Installing a second fuel pump is the best solution for a modified street car as it allows you to wire the second pump separately so that it is only in use when extra performance is required. More often than not you'd be using a street race car for cruising. Under these conditions you would not need a high fuel flow rate, in fact, it would be best not to have a high fuel flow rate under these conditions as it will just increase the amount of fuel that circulates to the fuel rail and back to the tank. This will expose the fuel to heat, which is not good. You can wire the second pump to only operate when it is required by installing a pressure sensitive switch on the intake manifold, or by installing a microswitch on the throttle body.
The two pumps can be installed in parallel with each pump having its own fuel pickup, or in series with one pump pumping into a second pump. When you install two pumps in parallel, you increase the fuel flow rate; but the two pumps must be of equal capability. Here the fuel flow rate will be the sum of the fuel flow rate of the two pumps. When you install tow pumps in series, you increase the fuel pressure rather than the fuel flow rate. This is because the second pump is being force fed by the first pump and fuel pressure is increased between the two pumps. Hence the second fuel pump does not need to increase the fuel pressure by much to meet the fuel pressure set by the fuel pressure regulator. However, the fuel flow rate does not increase by much and will only be approximately 120% of the fuel flow rate of the largest pump.
Could you clarify how you would set this up, if you have an intank picking up fuel how would you run another pump in parallel externally as it would require an extra pickup...?
Would this also require running a bigger fuel line?