Upgrading my fuel pump question?
I have a 1998 3000gt SL, i am planning on single turbo'ing it this summer. The first step in the process is a walbro 255hp fuel pump. I was wondering if i could drop that into my car now and if it will operate at a lower level until i eventually upgrade to the turbo. Should i get a tune for it or does the computer tell it how much it needs to push threw? Also would it hurt the pump to be running at a lower output?
Update:And the 255hp stands for high pressure, i didnt think it stood for horsepower or that would be a crappy pump with the turbo haha
Answers & Comments
Verified answer
The pump will have no effect on the system right now. The pumps operate at their maximum flow pretty much continuously (this is EXACTLY true, but good enough for our purposes). The fuel pressure regulator ensures that the injectors get the amount of fuel they want at the pressure they are designed/calibrated for. A higher volume fuel pump will just get more fuel returned to the fuel tank. You can put it in anytime, and you don't need to tune, and no it won't hurt the pump at all.
Fuel pumps are not measured in HP. They are measured in gallons per minute/flow rate, or GPM/pressure rating. If you have a fuel pressure regulator in your system, it will regulate to it's set pressure(if it is working correctly), and send unused pressure/volumm/fuel back to the tank. Unless you are doubeling the HP of your engine, your current fuel pump will work just excellent. With a turbo installed, your fuel demands will be only incrementally increased.
Would not hurt a thing. Any excess of pressure will just dump through the fuel return line.