jaygsi

iTrader: (46)

Wanted to upgrade to 440 injectors phase 2, from a v5 or v6. Was looking to get adaptors to fit my v4 model.

But then thought about swapping the fuel rails. So my question is will the fuel rails of a v5 v6 impreza fit a v3 v4 thanks

nivek4209

iTrader: (1)

Dunno about the rails but I have 440 injectors there I bought by mistake that are what you need
40€ and there yours
They are from version 4

cookstar

iTrader: (6)

Both phase 1 and phase 2 rails have definitely bolted up to my inlet so they should actually fit.

jaygsi

iTrader: (46)

Whats is yours mate?

cookstar

iTrader: (6)

99, but when I bought fuel rails for it phase 1 ones were sent out. I bolted them on without knowing unfortunately, fitted the adapter kit in the end but didn't get along with it. Then phase 2 rails were stopped into their place.

jaygsi

iTrader: (46)

So you had the grey 280 injectors? And now have 400 injectors with fuel rail?

jaygsi

iTrader: (46)

bttt

piehole1983

iTrader: (7)

Just get phase 1/1.5s and put them in. Unless your going for much more than 300bhp there's no point being fussy. I'd be more inclined to fit rails and 550s rather than rails and 440s.

jaygsi

iTrader: (46)

Was just thinking that the phase 2 are multi injection. And was thinking that would make a difference. But as you said aiming for about 300bhp.

piehole1983

iTrader: (7)

I don't think the effort and cost involved would be worthwhile for the power level. I'm going for the same as you with a TD05 and 440s, stepping up from a TD04 with 380s. It'll be fine!

jaygsi

iTrader: (46)

Cost wise there's no difference. Phase 1 and 1.5 injectors seem to go for more anyway. If it's not to hard to fit was thinking might be good idea. As there was a lad on here a while ago who got 300bhp on his 1999 impreza with td04 and standard phase 2 injectors

jaygsi

iTrader: (46)

Found this info on Andy Forrest website

Fuel Rails
Fuel rails varied throughout the years with Phase 1 MY93-98 , Phase 2 MY99-00 and Phase 3 MY01 onwards. Injectors are not interchangeable between phases although adaptors may be fitted to allow the installation of higher flow Phase 2 injectors into Phase 1 rails. Phase 3 are a completely different design and have top fuel feed as opposed to Phase 1 and 2 having side fuel feed. On Phase 1 and 2 fuel rails we have conducted tests and found uneven fuel delivery characterics at high outputs. This is due mainly to the bore and routing of the fuel rails. Typically number three injector at the end of the row has a lower fuel pressure than the others this can cause this cylinder to run lean, potentially causing engine damage.
There are a number of ways to overcome this – one is to rearrange the fuel feed in a parallel configuration feeding both sides of the engine simultaneously this reduces the pressure drop across the fuel rails by 50%. Optionally, using the APEXI Power FC ECU the fuelling can be adjusted for individual cylinders to suit the installation. This allows an improvement in the power, reliability and economy in comparison to what is possible with all the injectors running identical opening duration.

http://www.andyforrestperformance.co.uk/26032.html