305 TPI and 808 ECM

[Jackson, Trevor]

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


> -----Original Message-----
> From:	Matt Tomlins [SMTP:Mattpw at ozemail.com.au]
> Sent:	Wednesday, May 05, 1999 12:00 PM
> 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
> 
> 
> ----- Original Message -----
> From: Jackson, Trevor <trevor.jackson at dsto.defence.gov.au>
> To: <gmecm at efi332.eng.ohio-state.edu>; <diy_efi at efi332.eng.ohio-state.edu>
> Sent: Tuesday, 4 May 1999 5:05
> 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
> >
> >