DIY_EFI Digest V5 #177

[nacelp]

GM Headers, and connectors,
GMP Parts Co.
(916)  685-1055
Bashful


> Mike, I agree with you.  I was thinking of laying out a '186 board and
> setting it up so that I would work with the Borland development system,
> especially the remote debugger, to program the card.  Then a laptop with a
> serial link would be all that's needed.
>
> Have you looked at the group that's using a Motorola processor? I think
> they're using a cross-assembler and Mot assembly is quite simple.  I'm
> getting ready to look at them to find out if connector similarity would be
> useful.  Does anyone know where to source the connectors for standard
engine
> controllers, say a '747 type controller?  It would be nice just to plug
into
> a GM wiring harness.
>
> I believe that the timing is handled by measuring the time after a an
event.
> Lets say you want to fire a plug at 20 degrees before a cylinder.  You
start
> a timer from the centerline of the last cylinder and time.  You know the
> timer value because you know the time between pulses.  Anyone correct me
if
> I'm wrong.
>
> Reply to
>
> Mailto:dh at bamainc
>
> dh
>
>
> Date: Mon, 8 May 2000 10:51:04 -0600
> From: "Diehl, Jeffrey" <jdiehl at sandia.gov>
> Subject: RE: Old 486 Board for ECU? Why?
>
> So how are you getting these free samples?
>
> I tend to agree with this architecture, but this is a religious argument.
> Instead of arguing about architecture, it's more useful to us newbies if
we
> constrain our discussion to the "how" and "why" of EFI.  I'm here to
learn.
> On of the things I'm interested in is knowing about any novel applications
> for an DIY EFI.  The limited slip feature sounded so cool, for example!
>
> My rationale for wanting to use the PC architecture is that by simply
> re-writing a few lines of code, which I can do in my sleep, I can
completely
> change the way my car would respond.  Maybe I improve it.  Maybe it won't
> start.  Either way, I learn.  Now if I had to program a microcontroller in
a
> foreign assembler language, I might not be so eager to reprogram and
> experiment.  Just my $.02
>
> So, what are people doing for crank angel sensors?  I've thought about
> counting teeth on my flywheel.  The problem is that I only have 106 teeth.
> If I used to detectors, I could come up with 318 "events."  This gets me a
> 1.1 deg. resolution, and it might float a bit inside this range.  Any
better
> ideas would be most welcome.
>
> Thanx,
> Mike Diehl,
> MR-2, '87na
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