why the big difference in ECUs?

[Programmer]

Sure--send 'em out. There can be a big difference
even in the one model year. Wouldn't mind tackling
that...
Lyndon
-----Original Message-----
From: KasaRyan at aol.com <KasaRyan at aol.com>
To: gmecm at diy-efi.org <gmecm at diy-efi.org>
Date: September 10, 2000 1:07 PM
Subject: why the big difference in ECUs?


>Ok. I had a pretty good bin set up for the 94 7427 ecu in my truck.  I
>thought I would use tunercat and take all the table values and duplicate it
>for the 93 8625 ecu that goes in the truck.  I opened the stock 93 bin up
and
>set to changing table values, saved it, burned it, ran it.  The only things
>that worked right were idle and wot.  It bucked and jerked and wouldnt run
>right and was not very friendly - a digital throttle.  It didnt get any
>better or worse when it went into closed loop.  Yesterday I took the 93 bin
>and modified the injector size only and tried to run it.  It ran like crap,
>so I decided to change all the table values.  It still runs like crap, but
in
>a slightly different way.  When I originally got my howell setup, they made
>me buy a 94 7427, because Troy said they couldnt work with a 93.  There
must
>be some truth to this.  Obviously there is some sort of damping factor
value
>somewhere in the Howell bin that lets this combo work that is not in the
>factory bin.  Either way I can't get to it with tunercat.
>
>Does anyone have any ideas of what is wrong - I can zap you my bins.
>
>Thanks for listening to my electroyappin!
>Ryan Hampl - a K-State Grad!    kasaryan at aol.com
>139 Hoover Ct.                  Controls Engineer (tubes rule!)
>Salina, KS  67401               97 B12 / 86 V65 / 93chevy truck EFI 383
>phone  (785) 825 5831           I'M ALWAYS FIRST TO THE GROCERY STORE!
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