When do you need a FPR (Aftermarket)

[Okami]

Hi guys,

I need to know with my 4agze with stock injectors (I guess)
if I need a aftermarket FPR??? (Fuel pressure regulator)

I have ordered a QSP 160 lph fuel pump as I am running a little bit more boost with the upgraded crankshaft pulley.

I think I am around 170bhp with the 1st gen 4agze (originally 145bhp)
So upgrading to that 160lph fuel pump should be a step in the right direction.

What else would I need? Or what could make it all run better... (to preserve the engine as i am also drifting etc.).

[Uzelac]

If you are not making any changes to:
- engine (cams, valves, pistons...)
- or map
- or injectors

you should not change FPR.

[Okami]

Okay - in the future I will get 4age cams into the 4agze! Cheap upgrade!
and I will also buy better injectors as I will run more boost.

so only then I will probably need a FPR.

Thanks!

[fax0815]

Won´t need one for your current setup, but if you go get it mapped with the mods to come, a FPR comes handy for setting a the fuel pressure and maybe get that little bit extra fuel out of your injectors by running higher pressure.

Make sure you get one for turbo/ SC cars as you need the rising fuel pressure with rising boost pressure.

[Okami]

Thanks! Will try to keep that all in mind!