EFI control

[Shirley, Mark R]

So let's boil this down Bruce, what do you mean?  

-----Original Message-----
From: Bruce Plecan [mailto:nacelp at bright.net]
Sent: Wednesday, February 07, 2001 1:30 PM
To: diy_efi at diy-efi.org
Subject: Re: EFI control



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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