[Diy_efi] Electronic expertise requested

[Daniel R. Nicoson]

Thanks for the response Bruce.  A relay system could start to up the parts
count and failure points as well.  Is there any source on the net that
discusses failure probability of these various components in language a mere
mortal can understand?  You guys that design for a living must have to
calculate a failure probability on your projects at your day jobs?

I also owe you an apology.  I had promised to run tests comparing the DIY-WB
to my 4-gas analyzer.  I haven't made it to that project yet.  Hopefully I
can yet this summer.

Thanks,

Dan

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of bcroe at juno.com
Sent: Wednesday, June 18, 2003 7:36 PM
To: diy_efi at diy-efi.org
Subject: [Diy_efi] Electronic expertise requested


In general, you can't just connect 2 computers to your
injectors, the one that is "off" will still conduct current
in some situations.  Anyway, a failed injector driver
could defeat attempts of the backup to take control.

Systems CAN be designed to operate as you desire.
Short of a custom dual unit, I suggest you use a relay
to switch over the injector wires to the backup when
it is powered up.  Another way is just have a second
set of injectors.

Bruce Roe

18 Jun 03 "Daniel R. Nicoson" <A6intruder at adelphia.net> writes:

> Can one set of injectors be hooked to the two engine computers
> (Ford EEC-IV's in this case) at the same time if only one EEC is
> powered at any time?  The point would be that if one computer
> fails, flip the switch and the second computer powers up and
> runs the injectors.  My intention would be to have a backup EEC
> much like many race cars use a backup ignition system.

> Dan Nicoson

_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi