When using FMU for turbo, do you need a fuel pump?

 

depends.....how much boost....how big your injectors are and other stuff too...but if its a small turbo and not boosting much i would say no need.

 

stock injectors... 4.5 psi t3

 

stock pump will do you just fine....no need to worrie about it untill you start pushing more boost...9-15 psi is when you should start worring about more fule.

 

how much would u recommened boosting max for my setup?

stock injectors
12:1 FMU
stock internals
T3 turbonetics
stock pump

 

is this a LS or GSR?

 

maybe consider a inline pump?

 

I would not trust the stock fuel pump in a force induction setup myself. Fuel pumps are inexpensive and a piece of cake to install.

Purcahse atleast a 190 liter per hour in-tank fuel pump. YOu'll thank yourself later down the road. You want your FI setup to run a little on the rich side anyways. No lean mixtures at all. That is a no-no.

How much power do you think you're going to make at 4.5 psi? That matters more than the actual amount of boost you're putting through the engine.

 

this is LS...

4.5 psi feels decently powerful for me... i just dont know how much booost to higher so i stay low to be safe