[Bruce Plecan]

I'd go with the 87 1227148 ecm (and MAF sensor).
You're going to spend alot of time on the ecm end of things otherwise.
It's well documented at the GN Ttype site,
Mr James just posted a winbin editor for it, and there is a GMEPro, and
tunercat for it

Then to go state of the art with it,
you can add a Direct Scan (monitors things and data logs them off of the
edge card connector of the ecm.  Even a translator plus off of the Moderen
Muscle site.
Granted you not going to have the air flow a GN, but uses the stock stuff
you have you're probably going to exceed the resoltion of that combination

I'm just suggesting you investigate things more closely, and then proceed,
there is a bunch of stuff for the GNs that might be handy

I don't understand how you know what the timing table should look like,
before even seeing what you do have.
Cheers
Bruce

> Just found your site a couple of days ago and I'm sure I'm the cause of
all
> the anti-html stuff that came out as I signed up.( didn't know what the
hell
> all that meant)  I've built a 4.1L buick v-6 with >11:1 compression, more
> lift and duration in the cam and '87 GN intake (no turbo) using the ecm
and
> harness from a 85 fwd park ave.  ecm is #1227065 w/ATND prom. As you can
> probably guess the timing map is way off and I need to know if anyone has
> worked with a similar setup or can help me program or get the equipment to
> program my chip.  I know what I want the timing curve to look like but I
> don't know how to get it into my car.  I've been working with a guy who
has
> done some of this kind of thing but we've developed a prom ID error.  I
> believe that it is a result of not matching the factory checksum when we
> finished rewriting the chip.  Is that correct?  The car runs well when the
> timing is in the ballpark but it's not most of the time.  My O2 monitor is
> happy with the mixture and the control of it so far.
>
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