Quote:
Originally Posted by Katech_Zach
I will try to answer all of these in one shot:
-The XDI pump is a secondary high pressure fuel pump with a maximum fuel pressure output of 250bar / 3600psi. This is dependent on how fast you spin this pump.
-The amount of fuel that is able to go through the high-pressure side of the vehicles fuel system (both the OEM and XDI pump) is the amount of fuel that the low side pump is able to provide. Whether it is port injection, direct injection, or a combination of both, you will need a specific amount of fuel flow coming from the fuel tank to adequately provide any sort of fueling to the engine.
-On an engine dyno (not a car as you requested), we made 1486hp with only direct injection on race gas and 1308hp on e85. This would be near 1300whp and 1150whp respectively through a manual transmission in a vehicle. This engine was running the Hellion Twin Turbo kit for a Gen 6 Camaro on a stock LT5 camshaft, the precision 6266 turbos were to small to be pushed further. This is a great example of the DI system being able to keep up when the low pressure fuel system supplying the dyno was up to par.
-The smaller DSX pump is a great addition for certain power goals, otherwise you will have to go to a larger auxiliary pump or a larger in-tank solution. This is dependent on the horsepower you are trying to make obviously. I can help determine if that pump is adequate for a specific application if I knew what that application was.
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You may want to take time and explain the relationship between fuel flow and pressure. People get confused with pressure and volume all the time.