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1jz gte and injectors.

2004-10-12 16:11:00

Well, here is an interesting bit of info.

I'm in the middle of developing a digital injector monitor for supras (well,
probably most fuel injected engines) and have been running a model on my
jza70 for the last couple of days.

It would appear that with my currently stock setup, it is not too hard at high
RPM to push my injector duration to over 95%. I can see why the 1jz will eat
turbos when the boost is wound up, it is probably starting to run lean and
the EGTs will be high. 380cc is very small for a turbo injector, after all.

Interesting bit of info, really.

Regards,
Stuart W.

Re: 1jz gte and injectors.

2004-10-12 16:16:00

<Cully Paterson>

----- Original Message -----
From: "Stuart" <stuartw@kcbbs.gen.nz>
Subject: [sconz] 1jz gte and injectors.

>
> Well, here is an interesting bit of info.

> It would appear that with my currently stock setup, it is not too hard at
> high
> RPM to push my injector duration to over 95%.

Perhaps I might just highlight for those who were assuming otherwise: "stock
setup" also includes *stock boost* in this particular case.

Most interesting.

Cully

RE: 1jz gte and injectors.

2004-10-12 16:24:00

<Doig, Richard>

Especially interesting when the equivalent generation Celica (ST185) was
running 430cc for a 225bhp 4 cylinder...

Maybe they figured that what with the supra being a luxo-barge that they
would never get above 2500rpm cruising anyway?

> -----Original Message-----
> From: bounce-37298-27@list.supras.org.nz [mailto:bounce-37298-
> 27@list.supras.org.nz] On Behalf Of Cully Paterson
> Sent: Tuesday, 12 October 2004 4:17 p.m.
> To: Supra Club of NZ Mailing List
> Subject: Re: [sconz] 1jz gte and injectors.
>
>
> ----- Original Message -----
> From: "Stuart" <stuartw@kcbbs.gen.nz>
> Subject: [sconz] 1jz gte and injectors.
>
>
> >
> > Well, here is an interesting bit of info.
>
> > It would appear that with my currently stock setup, it is not too hard
> at
> > high
> > RPM to push my injector duration to over 95%.
>
>
> Perhaps I might just highlight for those who were assuming otherwise:
> "stock
> setup" also includes *stock boost* in this particular case.
>
> Most interesting.
>
> Cully
>
>
> ---
> Supra Club of New Zealand - http://www.supras.org.nz/
> Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

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RE: 1jz gte and injectors.

2004-10-12 16:49:00

<Stuart Woolford>

6 injectors in the 1jz Richard, not 4 ;) 225*6/4=337... Regards, Stuart.

RE: 1jz gte and injectors.

2004-10-12 16:55:00

<Stuart Woolford>

>6 injectors in the 1jz Richard, not 4 ;) >225*6/4=337... Can that, needs injector scaling also.. But the point is valid, 2 more injectors... Regards, Stuart.

RE: 1jz gte and injectors.

2004-10-12 16:55:00

<Doig, Richard>

Fine.

ST205, 540cc injectors x 4.

:-P

> -----Original Message-----
> From: bounce-37303-27@list.supras.org.nz [mailto:bounce-37303-
> 27@list.supras.org.nz] On Behalf Of Stuart Woolford
> Sent: Tuesday, 12 October 2004 4:48 p.m.
> To: Supra Club of NZ Mailing List
> Subject: RE:[sconz] 1jz gte and injectors.
>
> 6 injectors in the 1jz Richard, not 4 ;)
> 225*6/4=337...
>
> Regards,
> Stuart.
> ---
> Supra Club of New Zealand - http://www.supras.org.nz/
> Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

____________________________________________________________________
CAUTION - This message may contain privileged and confidential
information intended only for the use of the addressee named above.
If you are not the intended recipient of this message you are hereby
notified that any use, dissemination, distribution or reproduction
of this message is prohibited. If you have received this message in
error please notify Air New Zealand immediately. Any views expressed
in this message are those of the individual sender and may not
necessarily reflect the views of Air New Zealand.
_____________________________________________________________________
For more information on the Air New Zealand Group, visit us online
at http://www.airnewzealand.com
_____________________________________________________________________

Re: 1jz gte and injectors.

2004-10-12 18:17:00

<Marc Archbold>

What is interesting, that on dyno runs with my JZA70 with boost at 15 psi, my
AFR was 10.
You would expect that the injector duty is therefore completely maxed out, but
it was not leaning out, only by adjusting the FCD could I bring the afr to 11.

Stuart how have you verified your meter accurate?

Regards,
Marc

> >
> > Well, here is an interesting bit of info.
>
> > It would appear that with my currently stock setup, it is not too hard
> at
> > high
> > RPM to push my injector duration to over 95%.
>
>
> Perhaps I might just highlight for those who were assuming otherwise:
> "stock
> setup" also includes *stock boost* in this particular case.
>
> Most interesting.
>
> Cully
>

Re: 1jz gte and injectors.

2004-10-12 23:20:00

And i was running mine at 17.5psi boost with 236kw and i was running 11.5 afr and with the 430cc which i have got now running well over 300kw i am still running max 11.5 aft.

>From: Marc Archbold <marc.a@paradise.net.nz>

>Reply-To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz>

>To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz>

>Subject: Re: [sconz] 1jz gte and injectors.

>Date: Tue, 12 Oct 2004 18:17:17 +1300 (NZDT)

>What is interesting, that on dyno runs with my JZA70 with boost at 15 psi, my

>You would expect that the injector duty is therefore completely maxed out, but

>it was not leaning out, only by adjusting the FCD could I bring the afr to 11.

>Stuart how have you verified your meter accurate?

> > > Well, here is an interesting bit of info.

> > > It would appear that with my currently stock setup, it is not too hard

> > > RPM to push my injector duration to over 95%.

> > Perhaps I might just highlight for those who were assuming otherwise:

> > setup" also includes *stock boost* in this particular case.

> > Most interesting.

>Supra Club of New Zealand - http://www.supras.org.nz/

>Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz

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