hi iam going to be running a t3/t04e turbo on my integra, can i use a fmu for fuel maningment, with stock injectors, and how much psi can i run on that

 

Maybe 5-6 safely.

 

will i need a new fuel pump or will stock work

 

just use an intank pump and fmu only works with stock injectors anyways, and its safe up to 10psi, but i've seen 14psi, but it puts alot of strain on the fuel system.

 

a stock intake pump or a walbro

 

I ran 14psi for about a week with a fmu, turned it down to 8 and got a fuel pump and used it the whole time...ran fine

 

Aftermarket fuel pumps generally flow more fuel, but don't necessarily generate any higher pressure, and sometimes they won't make as much pressure as a stock fuel pump. When using an FMU, it's all about pressure, as the FMU will typically raise the pressure by 8-12 PSI per PSI of boost. So starting with around 40 PSI base fuel pressure, if you make 10 PSI of boost, then your pump will have to make as much as 160 PSI of fuel pressure, which many fuel pumps will not do. My fuel pump gave up before I got to 10 PSI, and I broke all my pistons as a result. I've heard of people running 8 PSI successfully, but that's pushing it. If you want to run more than 5-6 PSI, then get some real fuel management.

 

so can i use a stock pump or an walbro 255

 

I don't think it matters.