EPROM Programming

[Len Sabatine]

   A BIG AMEN to what your saying , David.
   Len
>If you'll accept Ford related input, what Bruce says is absolutely correct.
>It takes time to dial in a tune. Luckily we Ford guys can now do this
>without reburning a chip, but it still takes the time to analyze any
>datalogs, decide what to do, put in the changes, then download them to the
>EEC (ford's ecm).  I figure if I were burning chips for my car I'd be on
>burn 50 or more by now.
>
>David
>-----Original Message-----
>From: Bruce Plecan <nacelp at bright.net>
>To: gmecm at diy-efi.org <gmecm at diy-efi.org>
>Date: Thursday, August 03, 2000 9:21 PM
>Subject: Re: EPROM Programming
>
>
> >
> >> I am interested in modifying my GMECM EPROM. I have read Programming 101
> >and
> >> the tuning tips. So is it as simple as getting an EPROM burner, getting
> >> tuning software like Tunercat, getting their chip TDF file for the ECM
> >that I
> >> have, making the changes, and then burning the chip? Will the .bin files
> >on
> >> the DIY-EFI site work without any changes? Or do I have to remove the
>VATS
> >> and EGR functions? In reading the tuning tips by Dr. Bruce Plecan, it
> >appears
> >> that you make a change, drive the car, then make another change. Isn't
> >that
> >> very time consuming since you have to reburn the chip every time, or is
>he
> >> using some real time program he didn't mention?
> >
> >There was nothing "trick" or "secret" left out.
> >Contrary to what so many folks want there is no sweet and simple 15 min way
> >to optimise a chip, for a modified engine.  Least not if you want close to
> >perfection.
> >Once, you get a chip "perfect", and you see what even a 747 can do, it will
> >truely amaze you.
> >It took about 400 "burns" to get things right. Time consuming, yes.  I'm
> >much faster now.  I can dial in a stock engine (for WOT) in about a dozen
> >chips or less now.  Probably 100 or less for modified engine, but I've done
> >alot of chips in the last few years, and looked at many chips that others
> >have done.
> >Used only the tools mentioned in tuning tips
> >Grumpy
> >
> >>
> >> Last, does anyone know if the fuel pressure on a TBI system changes with
> >> engine vacuum like it does on a TPI system?
> >>
> >> Thanks for the help.
> >>
> >> John Wilson
> >> -------------------------------------------------------------------------
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