Old 486 Board for ECU? Why?

[Diehl, Jeffrey]

I went to Electromotive's web page and read up on the TEC II unit.  They
claim 1/4 degree resolution.  This seems more reasonable than the 1.1 degree
that I can imagine.  I was wondering how you could handle situations where
you might want to advance the timeing, say, 1.5 degrees at 5600rpm.  I dont'
want to try to interpolate in this area.  At any rate, how much would I
expect to pay for a CAS?  And are they available w/ 1/4 degree resolution?

Thanx,
Mike Diehl,
MR-2, '87na

-----Original Message-----
From: Frederic Breitwieser [mailto:frederic at xephic.dynip.com]
Sent: May 08, 2000 11:25 AM
To: 'diy_efi at diy-efi.org'
Subject: RE: Old 486 Board for ECU? Why?


>So how are you getting these free samples?

I own a business named "Xephic Technology" which primarily is a small
consulting company for Lan/Wan & server infrastructure, but the name is
meaningless (much like Xerox) so it can at a moment's notice, be slanted
towards the embedded electronics market as well as the automotive market.

See, we develop new products :)

>constrain our discussion to the "how" and "why" of EFI.  I'm here to

Same as you, this is why I chose the PC platform.  Technically right or
wrong, I can get something working quicker.  Smaller learning curve.  Maybe
down the road I could extropolate what I have learned and embed it into
something the size of a $5 bill.  Size and current draw is irrelevant.
Functionality is.  With Linux, I have all the tools necessary to make this
work.  Real time OS, multi-threaded OS, its not -that- huge unlike NT, it
supports serial, video, networking, etc, has a compiler, and is absolutely
free.  Free is good.

>So, what are people doing for crank angel sensors?  I've thought about

I use two sensors, crank sensor, and cam sensor.  The units I use were
purchased from Electromotive specifically for their Tec II unit, which I
have, and redrilling the sensor plates to match my Dodge engine was a breeze
for one of my buddies.  Me, I can't drill a round hole with my drill press
:)

>1.1 deg. resolution, and it might float a bit inside this range.  Any

>From my experience, this is all you need.  My sensors give me much less
resolution, but enough to survive by.  

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