TX-Ripper
Well-Known Member
The dw400 is your limit, even with a BAP.
You will drop pressure around 720-730 rwhp on E85
You will drop pressure around 720-730 rwhp on E85
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What would the stock pump be good for with a BAP? my dw400 is at 18v made 770 but I went from 3.75 to 3.875 pulley to be safer.The dw400 is your limit, even with a BAP.
You will drop pressure around 720-730 rwhp.
While I completely agree with this sentiment, the problem is that ALL of the fuel still has to be supplied by the DW400. Adding a larger DI pump doesn't change that. If a single DW400 doesn't keep up on a stock DI pump, then it won't keep up on an XDI pump. I still had to add a BAP to my DW400 because my lift pressure was falling below 55 psi with a setpoint of 72, and that's on 93.I wonder what the max hp on e85 would be with DW400 in tank pump, id1050x and this xtreme DI pump with stock di injectors. I am very interested in this, I am whippled on e85 without a return fuel system currently and I dont want a return style fuel system because of a lot of reasons, fuel heating, or relying on hobbs switches, multiple pumps that could fail, or both being some of the main ones. Just more stuff that could go wrong it seems.
It actually doesn't really work that way. The stock DI pump is big enough to barely maintain 90% GDI on the stock engine. Once supercharged, you have to cut GDI blend (send more to port) as soon as the boost starts coming in. With the bigger GDI pump you can leave it at 90% blend to a much higher power level, but when you hit the injector limit you have to cut blend again. If you wanted to run 90% blend using the XDI pump and stock injectors on 93, boost would be limited to something like 6-7 psi. But at 6-7 psi the gains from 90% blend would be minimal.Are new DI injectors required at a certain known hp with this setup?
I think a single DW440 on PWM boosted to 22 volts would be the cat's meow. I'm not sure what power it would support on E85 but it would support a ton on gasoline and have the advantage of running the stock turn-down and no return line. If my DW400/BAP runs out of steam, that's my next option.If you don't want a return style (and you find a tuner that's willing to tune big numbers on returnless) you might look into twin DW440's.
I did some looking at old logs regarding flow rate of the pumps and this is what I found:
On the stock pump I saw 260 lb/hr at about 80% duty cycle. At the time I was leaving some on the table to allow for colder conditions and cat protect. I later realized that the cat-protect fuel just as well go through port so I was being overly conservative at the time.
On the XDi pump and stock injectors, by dropping pressure to 2600 psi and delaying end-of-injection (EOI) to the point of losing major power, I got 380 lb/hr out of the XDI pump at 90% duty cycle.
On the XDi pump and stock injectors, by optimizing pressure and EOI for the stock injectors, I'm now flowing 350 lb/hr running about 80% duty cycle. This is at 3300 psi. I have a tiny bit more optimization to do here but these numbers are pretty close.
I think the pump is good for 400 lb/hr at 100% duty cycle and larger injectors.
GDI High Flow Pump HPFP-45 for 2018 Mustang GT 5.0 - Xtreme-DiThe stock pump can support barely over stock power at 90% blend on gasoline. The xdi pump is rated at 45% over stock. 500x1.45= 725 hp.
Doing it the other way….
400 lb/hr / 0.5 lb/hp-hr bsfc = 800 hp.
So there’s the range; probably 750-800 hp max at 90% blend on gasoline. I don’t think anyone claimed the pump can support 1000+ running 90-100% gdi blend.
If I am running 1050x now on a return system, just upgraded to a bigger blower and maybe I can put on this pump without having to upgrade the injectors and a bigger in tank pumps to get more out of the blower. Price wise I might be better off just going to bigger injectors and pumps, but not sure about down time on car and work time required to install. Not saying it is a better choice, but might be an option is why I was looking at it.Xdi pump is a total waste of money on E85
If you want this pump to shine, you're going to need the cam and DI injectors, along with the pump. With all that, there will be no need for any other additional fuel components including port injectorsIf I am running 1050x now on a return system, just upgraded to a bigger blower and maybe I can put on this pump without having to upgrade the injectors and a bigger in tank pumps to get more out of the blower. Price wise I might be better off just going to bigger injectors and pumps, but not sure about down time on car and work time required to install. Not saying it is a better choice, but might be an option is why I was looking at it.