Which Injectors Should I Be Using??
 

as above im in the process of having a 2.5l bottom end fitted to replace my knackered 2l bottom end out of my type r and wondering if i will need bigger injectors and fuel pressure regulator. currently the car is running the following mods :-

VF34 turbo
equal length headers & up-pipe
3" exhaust turbo back
walbro fuel pump
simtek management
autobahn88 fmic with apexi filter

any advice would be much appreciated

cheers hutch.

yellows should be fine but pinks would be better!

I assume this is a Classic.
440cc yellow will do the job but with high IDCs.
You have two fueling options, a fuel pressure regulator to lift the pressure or straight on to 550 cc injectors.
Your decision will be influenced by any future plans you may have, to stay at this power level or go for a bit more.
With all suitable mods your turbo may run to 350/360bhp and 550cc injectors can go well beyond that but 440s are at high IDCs well before that even when the pressure is uplifted.

Good choice of ECU. A Simtek on my STi 3 Wagon in place of the O/E ECU saw a power gain AND reduced IDCs. :)

thanks for the advice i think i'll end up with a set of 550 injectors to be safe.

cheers hutch

550's. I had a 2.0 on 380 greys with a TD04, then changed to a VF35 and had to use 440 cc yellows to get the IDC down to a reasonable level, then just changed to a TD05 with the same yellows but an adjustable fuel pressure regulator running at 3.5 bar instead of 3.0. If I could have, I would have replaced the 440s with 550s.