Was ECM question '91 and up TBI now BBC TBI

[Programmer]

Would love one, too !!

Lyndon.
----- Original Message -----
From: Walter Sherwin <wsherwin at home.com>
To: <gmecm at diy-efi.org>
Sent: Tuesday, July 24, 2001 8:51 PM
Subject: Re: Was ECM question '91 and up TBI now BBC TBI


>
>
>
> > The reason why I am asking is that GM has released a new EPROM for the
GM
> > performance parts retro-fit TBI 502 BBC. One of my associates has built
a
> > 496 stroker that is in a '89 truck with a 400. If the ECM's were
> compatible
> > (or upgradeable with minimal hassle) then perhaps this would be a good
> > calibration to start with.
>
>
>
> That GM retro kit is based around a GEN V/VI 502 HT TBI engine, together
> with a 4L80E trans and 91-93 SS exhaust and 16147060 PCM controller.  Your
> bud's truck will have a different ECM that is no where near the same as
this
> box.  You can elect to either adapt a '7060 in place of the OE controller
> (and obviate certain trans error codes, and rewire to suit), or, you can
> recal the existing OE '8747 box with readily available software such as
from
> Tuner Cat.  I'd opt for the later option, as you get to keep keep your
stock
> box & wiring in tact.  If you had a copy of the retro 502 cal, it might be
> useful as a benchmark for comparative purposes, but that's about it.
>
> Is your bud's 496 going to also be TBI?  If so, then there's a whole bunch
> of other stuff you'll absolutely need to know, way beyond the pure
software
> requirements............
>
>
> Walt.
>
> PS:  If anyone has a copy of the retro 502 binary image, I sure would
> appreciate a copy sent this way.  To buy one costs over 10 times what a
> "normal" MEMCAL costs from the dealer.
>
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