305 TPI and 808 ECM - correction

[Bruce Plecan]

Your asking for a Broadcast code? (If so, what tranny?).
You need a VATS signal generator circuit? (If so mail me off list and I'll
send it to you as an attachment).
OK, now what's the question?, I'm getting ADD from trying to follow this.
Grumpy

> Oops, that should have been APYM3493 - I can't even read my own writing.
>
 > From: Jackson, Trevor
> > Subject: RE: 305 TPI and 808 ECM
> > Matt
> > When I get time in the next few days I'll make up a circuit to disable
the
> > VATS. What I need to know is what PROM code is the correct one to use -
> > I've
> > been unable to find any reference to the AGYM3493 EPROM that we
currently
> > have. If I can get hold of the right data then I should be able to burn
a
> > new EPROM to use. Do you know what the correct EPROM version is?
> > Trevor
> > > From: Matt Tomlins [SMTP:Mattpw at ozemail.com.au]
> > > To: Jackson, Trevor; diy_efi at efi332.eng.ohio-state.edu
> > > Subject: Re: 305 TPI and 808 ECM
> > > Trevor,
> > > The 165 is the same as an 808 apart from having 1 extra chip to
perform
> > > high
> > > speed serial communications.
> > > The Camaro application is a Mass Air Flow system, whereas the
Commodore
> > is
> > > MAP based. If you try to run the Camaro on the ASBX calibration, it
will
> > > run, but in limp home mode. You need to use a MAP sensor for it to run
> > > properly. If you want to run the Camaro calibration, you will need to
> > > disable the VATS. This can be done via an external circuit, or
disabled
> > in
> > > the calibration (Much tidier solution). All of this informaion is in
the
> > > DIY_EFI archeives. Having said all that, I have run a mates Camaro on
an
> > > ASBX memcal. It ran quite well, but needed some modifications to the
> > idle
> > > control area.
> > > If you need any more help, let me know
> > > Cheers
> > > Matt Tomlins
> > > From: Jackson, Trevor <trevor.jackson at dsto.defence.gov.au>
> > > Subject: 305 TPI and 808 ECM
> > > > I'm currently trying to help a friend get a 305 TPI engine running,
> > but
> > > > without much success so far. I believe that the engine is from an 87
> > or
> > > 88
> > > > Camero auto (bought from a wrecked car), the wiring loom is from a
> > > manual
> > > > Camero, and the ECM we have is from the Australian Holden Commodore
> > > (which
> > > > from what I've read from the archives is the 1227808).
> > > > I understand that the '808 ecm is more or less equivalent to the
'165
> > > ecm,
> > > > and so we should be able to use it OK. The problem we have is with
the
> > > > Memcals. We have the Memcal that came with the ecm, which is a ASBX
> > 9285
> > > > from the 307 engine that is used in the Commodores, and a Memcal
from
> > > (we
> > > > think) a 89 Camero with a 305 TPI (EPROM AGYM 3493).
> > > > As yet we have been able to get the engine running using the 89
Camero
> > > > Memcal, but it does run (not very well though) using the Memcal from
> > the
> > > > Commodore.
> > > > We think that the Memcal from the 89 Camero is not working because
we
> > do
> > > not
> > > > have a VATS signal to send to the ecm - I plan to build the circuit
to
> > > > emulate that so that we can see if that is the problem. If this is
the
> > > > problem, is the program/data from the AGYM 3493 EPROM suitable for
> > this
> > > > engine, or do I need to get hold of a different EPROM image and
> > program
> > > up
> > > > another EPROM?
> > > > BTW, can anyone tell me what is the correct EPROM image for an 87/88
> > 305
> > > TPI
> > > > engine?
> > > > I've only just discovered these mailing lists and am slowly making
my
> > > way
> > > > through the archives. There is a mountain of info there - I just
need
> > to
> > > > find the relevant pieces.
> > > > regards
> > > > Trevor Jackson