Nissan FJ20 Turbo Injection System

[Nick Tangney]

Steve,
Thanks for your advice.
The injectors I have are not all from the same engine I suspect. I'm not sure
becase I bought them from EKW in Melbourne - had them freighted here. I'll be
sending them back. Still, I'm curious as to whether there are any differences
between them - they are of course very similar to, if not the same as the
injectors used in Holden's VL commodore turbo, but try finding those! I really
don't care what injectors I use, so long as they are capable of about 75 Hp
each, suit a turbo engine and will fit the manifold I have.
The Autronic SM2 controller I have can handle different injectors, only the
manual for the software which I have is so poor (as supplied by Autronic) that
I have been unable to figure out which setting is for which type of injector.
Fun and games!
Enjoy your weekend.
Nick

Steve Lamb wrote:

> >I have a question regarding a 2 litre Alfa Romeo turbo efi engine which
> >I am building. The engine will utilise an Autronic SM2 computer (I'm in
> >Australia btw), DFI (from a Subaru WRX) and injectors from a Nissan FJ20
> >turbo. I need to know the following:
> >1./ Do I need to use ballast resistors in-line to the FJ20T injectors,
> >or can the Autronic SM2 software dispense with the need for this?
>
> With a standard FJ20(T) system ballast resistors are normally used.
> Measure the injector resistance - if its about 2.5 Ohm then resistors would
> have been used.  But if the Autronic system is anything like a Motec (and
> supposedly it is) then you should be able to dispense with the resistors.
> Suggest you ring Autronic to be sure, they're not far up the road from
> where I live in Melbourne.  If you need their number let me know.
>
> >2./ What is the max flow rate of the FJ20 Turbo injectors and their max
> >hp capacity (each)?
>
> I'm told NA FJ20 injectors are good for about 50HP each, so the FJ20T
> versions should be OK for around 70+ (??), but I'm yet to find any 'hard'
> data.
>
> >3./ I have seen 3 different injectors for the FJ20T all stamped A46-00
> >on the side but with 3 different numbers stamped on the top: 4144 2525B,
> >41443205B or 4144 3309B. The colour of the plastic moulding differs
> >between each of the three injectors also, but is there any performance
> >difference and can they be interchanged and mixed in the same engine?
>
> I would be a bit concerned about the different colouring/numbering of the
> injectors.  All the sets I've seen from Nissan engines have been the 'same'
> - are you sure all the injectors were taken from the same engine ?? (if
> they were you should be OK).  'Mixing' injectors is not a good idea unless
> your absolutely sure that all the injectors came from the same engine type
> - and preferably from the same model series.
>
> >4./ Anyone got a wiring diagram for the Subaru WRX direct fire ignition
> >system?
>
> Some of the Motec documentation I have may have something about this - I'll
> check on the weekend.  But, again, Autronic should be able to help here.
>
> Cheers
>
> Steve Lamb
> Department of Defence, DSTO
> Aeronautical and Maritime Research Laboratory
> 506 Lorimer Street
> Fishermans Bend  VIC 3207 Australia
>
> Tel: +61 3 9626 7525
> Fax: +61 3 9626 7089
>
> IZCC #180