Can anyone tell me the standard fitment injector size
on MY98 UK Turbo. Would they be able to supply enough fuel
for 1.25 bar boost on standard turbo?

Cheers

George

 

380cc,

1.25bar at what RPM, what AFR and what fuel pressure?

Midrange no problem, top end marginal on std ECU and fuel pump.

Andrew...

[Edit to say: just noticed that you say std turbo, this won't hold 1.25bar passed about 5500RPM]


[Edited by AndrewC - 5/25/2003 9:21:06 PM]

 

Cheers Andrew,

Was thinking of getting the Phase 1 board remapped for a bit more power. Around 1.15 bar boost at the moment 4/5th gear, Standard fuel pump and injectors.

I suppose at £90 per hour for the mapping it may be best to source
some bigger injectors and turbo first.

I dont want anything with too much lag, perhaps one of the VF series. Injector wise, what would best support anything from 300-340 bhp as this is what i'm aiming for.

If you fitted an uprated fuel pump would the pressure regulator be ok or would this need upgrading too?

George

 

I don't want to start another best turbo debate, but for that kind of power a front entry TD05 is pretty VFM and with ported headers and turbine inlet it will spool pretty much aswell as the TD04.

The std FPR is not really up to maintaining the std fuel pressure with an uprated pump, so some type of uprated FPR is a good idea, also gives you a bit of adjustability over fuel pressure.

440cc injectors can make that kind of power if you up the fuel pressure (or use a rising rate FPR), they're also quite easy to get hold of for phase1 fuel rails as they were std fitment in STi V3/4s, bigger injectors (480s or 550s) will give you even more headroom and safety margin.

There are other ways of making power rather than just upping the boost, attention to airflow restriction in the inlet and exhaust and efficient charge cooling (or lack of charge flow heating) will pay big dividends in both power and reliability.

Andrew...

 

Ok then,

Would this be a good set-up?

Uprated fuel pump
Uprated fuel pressure regulator
550 cc injectors
TD05 converted to front entry
Phase 1 board mapped to suit

Allready have decat exhaust, Sti intercooler and pipework.

What boost could you run safely on this set up and roughly what power should this make?

Am I going to have difficulty sourcing 550 injectors for phase 1 fuel rails?

Cheers


George