Dual pumps need to be parallel and not in series for max flow (If it's properly designed for the pressure requirements). Series will help maintain pressure, parallel will add flow.

 

Bosch pumps can handle a lot of pressure, I can see no need to run them in series....ever.

I switched from a A1000, because according to Aero's flow information, the pump really isnt that good, especially at higher pressures.
Given I cannot run low Z injectors, I wanted a fuel system capable of an easy 1000+, BUT that could do so using higher pressures than would normally be needed due to inadequate injector sizing.

The A1000 was also very big, and took up room in my trunk, as it wouldnt fit underneath my tank. With the 044's installed under my tank, I can now fit 1 one my wheel/tyre that I used when I go racing. ( the other goes in back seat )

I did look into various other single pumps, but from reading the forums, either they all appeared very noisy, or specs on them didnt seem to great at high pressures ( circa 80psi ) plus they are all massive. And then there is the reliability issue.

Bosch pumps are OE, so their reliability is second to none. They arent that noisy IMO, and are very compact. Their high pressure flow is also excellent.
So in reality, it would have been stupid to use any other pumps.

A1000 or the 044's can be used in-tank.

 

I think anything can be done in the tank... if you create a new bulkhead... or bypass the factory piece altogether. The factory electrical connector can only flow so much amperage before it starts to cook. I have heard of F-Body guys smokin' their factory electrical feedthru connector by trying to wire 2 255 intanks through it. Others seem to be surviving with dual intank's with no problem.

You can run an intank 255 and an inline Bosch 044 (with a 40Amp BAP)and surpass 800rwhp/tq. I did it 3 years ago. The boost referenced fuel graph was posted showing fuel pressure rising 1:1 with boost and showed no signs of dropping off at lift. I am comfortable stating the fuel system could support 1000rwhp/tq. I like ECS's fuel system with their innovative bulkhead adaptor that feed's the 044 outside the tank.

I am running an intank 255 right now (no BAP)... and am losing pressure at my current power (see sig). When I lift at 5500rpm or so I am at 46psi on the gauge. With 9 psi pushing against the bottom of the injectors that nets me about 37psi... because fuel is not currently boost referenced. I am getting ZERO KR... go figure.... maybe its the Torco But this is an example of an borderline incapable fuel system not working efficiantly... but not showing its ugly head... yet. I am going to run an inline 044, boost referenced, and return the fuel with a custom made adaptor dumping it back through the gas filler neck. Goal is to not drop my tank... again... as I prep for forged LS6 power.

With all the different fuel setups out there nowadays... do you ever wonder why you very rarely, if ever, see fuel performance graphed and posted? Considering the cost of a dyno... adding fuel and boost logging capability is a drop in the bucket...

Bill

 

If the fuel system is working though, why would anyone ever need to post a graph of it ?

I could log my fuel pressure if I wanted to. I just cant be bothered. But I know from my FP gauge, that I have no issues to warrant logging it.

 

Thanks Bill, your always helpful.

 

I think he is referring to marketing and sales for different systems, in other words documenting results.

Your system is one step up from twin 255s so I think your golden until 1100rwhp.