305 TPI and 808 ECM

[Matt Tomlins]

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
>
>