EFI control

[Bruce Plecan]

This started with the use of the word pretty.
Which is cosmetic.  Nothing to do with reliability, or engineering.
Then, in some relies, things went off on tangents, and engineering.
  I mentioned KISS,  which is just that.   Enough to do all that is
"reguired".   You "first" set the standard of what you want (required), and
then go for it.  To in hindsight say something was good or bad to a
different standard then what it was designed for is not at all fair to the
original designer.    While now a C3 looks prehistoric, it is so, only by
todays standards.
   Comparing an aftermarket to an oem ecm, are two different matters.  One's
primary goal is being user friendly, and the other is ham strung by federal
regulations.
   No where have I even implied, reliability is not an issue.   I have used
nothing but oem ecms in my cars and even at that carry a spare and
calibration for it.   With my medical stuff,  I basically have no immune
system, and limited physical endurance,  so getting stranded, can turn
fatally serious for me.
   I never said the PCMs were over engineered, just that it took them years,
to get to this level.   They were also, *forced* to this level of
engineering.   Without goverment mandates, or warranty concerns, the PCMs
would at least software wise be less complicated (well at lest could be).
    I also, keep in mind this is DIY-EFI.   Kludging is allowed, doing
things different from oem is to be encouraged, and, that this an **open**
dialog.   All to often folks see another view as an attack or something.
It's supposed to be the free exchange of ideas, or knowledge.   Every one is
entitled to there own views and opinions.   Switching topics mid
conversation, can be in effect more of an ego thing, then conversational.
The effort to be right about something.
    Earlier today, the one guys mentions, "How would Porsche do it?".
That's is totaly fine, with me, but personally, I'd rather expeiment, and
try my own solution.   To each his own.
Cheers
Bruce

From: "Shirley, Mark R" <MarkRShirley at eaton.com>
> So let's boil this down Bruce, what do you mean?

> From: Bruce Plecan [mailto:nacelp at bright.net]
> Golly take about defensive attitudes, and reading 10x more into a comment
> then what was said, geesh, BTW, Noone looks for reliability more then I.
> NO ONE.
> Later
> Bruce

> From: "Eric Bryant" <BRYANTE at ghsp.com>
> > > From: Bruce Plecan [mailto:nacelp at bright.net]
> > > Subject: Re: EFI control
> > > Ugh, well here we go again, from accel to GM PCMs.  OK, took
> > > GM almost 20
> > > years to evolve this far.   GM sells what about 18 trillion
> > > pcms a year?.
> > > If the new stuff was still a ecm it probably would be in the
> > > same box as in
> > > 82, just the newer stuff has that much more heat, and
> > > enironment to deal
> > > with.   Things get to where they are also over engineered,
> > > and KISS gets
> > > completely lost.
> > > Bruce
>
> > Well, I'm an automotive electrical engineer, and I do understand why the
> > requirements have evolved to the point where they're at right now.  If
> > you're only driving your car on the strip and it's being operated from
> temps
> > ranging from, oh, 40 F to 100 F, and only on dry days, then I can see
> where
> > you don't need the level of engineering that an OEM part provides.
> > However, if your car is a daily driver, and you want a module that will
> last
> > many years and work in all sessons, and all conditions, then you really,
> > really do need the level of engineering that the OEMs perform.  Sorry,
but
> > if I'm dropping $3000 on a aftermarket ECU, then I want something that's
> > going to work within the stated operating parameters.  If the vendor
> claims
> > that the part is good for fair-weather use only and shouldn't be used on
a
> > daily driver, fine.  If the vendor is claiming that I can bolt his XYZ
ECU
> > into my car for use as a daily driver, then he had better comprehend the
> > environment and its effects on his module.
> > So, is the average aftermarket part tested for EMC behavior?  No?  So
what
> > happens when I drive past a cell phone tower?  How about thermal shock
> > testing?  No?  Oops, better not go through the car wash on a hot summer
> day.
> > Shock and vibration testing?  Here in Michigan we have huge potholes.
> > I know that I'm going to come off as yet another young engineer who
wants
> to
> > make everything more complex just for the sake of doing so.  It's just
> that
> > I've seen some stuff that doesn't belong in an alarm clock, much less in
a
> > automotive environment where I'm trusting my equipment (and maybe even
my
> > safety) to a piece of junk that wasn't properly engineered.
> > End of rant.  I don't have the right to tell anyone what parts to run in
> > their car - all I can do is set standards for my own stuff.
> > Eric Bryant
> > mailto:bryante at ghsp.com
> > http://www.novagate.com/~bryante

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