OK... here is the new flow chart for the pumps. It also has the Bosch "044" in it. I have them displayed on various charts.

Go here:

http://www.thedrunken.com/excel/

And click on the tabs at the bottom to go through the sheets. The ones pertinent to this topic are under "Pump HP Cap", "Pump Flows", Injector vs. psi", and "Calculations" tabs at the bottom.

The flow numbers are from RC Engineering, Aeromotive, Independent testing, and Magizine tech articles. They should be accurate. All voltages are at 13.5 volts except the Cosmo which is 13.8 volts. These are the closest voltages to what most people will see. If you hardwire your pump and dont bump yer stereo and such you could see more like 14.2-14.8 volts which would flow more. I am getting too lazy to make another chart with Flow vs. Volts... this should be good enough for people to see.

 

Dual pumps when ran in series results in the same flow at higher pressure. For us, it means you can run much more pressure without the same pressure drop... the simple way to think of it is find the fuel psi you will run, find the flow of a single pump at that pressure and double it, or make it the max flow of the pump, whichever is less. Usually, since we wont be running over 100psi, you will hit the max pump flow before you need to start doing the math.

When ran parallel, you double the flow.. very simple. Find your fuel pressure and flow for a single pump and double the flow at that pressure.

Now the complicated math portion comes in because of fuel line restriction, turbulence, fuel heating, etc, etc... This is kinda a guestimate but should be close enough for what we use the calculations for.