dresser

iTrader: (1)

Hi going to fit a FX fuel pressure regulator this weekend to a 04 Sti, will be connectd to a defi, anybody tell me what pressure i should set it to. and any tips on fitting.

Thanks,
Rob.

MarkFitz

Hiya,

3bar/43.5psi, set with engine idling and fpr vac hose disconnected.

dresser

iTrader: (1)

Thanks for the reply, so when i set it to 3 bar will it stay at that pressure when driving or fluctuate.

Thanks,
Rob.

Peanuts

iTrader: (15)

it constantly fluctuates.
You set the fuel pressure at atmospheric pressure, with the manifold vac line disconnected.
Then when you reconnect the vac line it will miraculously drop about half a bar straight away depending on the turbo.
The as pressure increases so does fuel pressure.
Hence why at reasonable boost levels people suggest NOT fitting the sytec/FSE units but SX

dresser

iTrader: (1)

Sorry mine is the sx thanks for the info.

MarkFitz

[quote=Peanuts;8086303]it constantly fluctuates.
You set the fuel pressure at atmospheric pressure, with the manifold vac line disconnected.

...setting the fpr at 1 atm is a bit low mate, - oe fpr is set to 3bar.