Re: TBI to TPI Conversion

[Todd Israels <israels@mnsi.net>]

At 04:30 PM 4/11/00 -0500, you wrote:
> Problem with the '94 Camaro is the optispark ('93 was non-electronic
> 4L60). Now, you could just drop an LT1 in there and call it good, but it
> would be tough (not impossible, just tough) to use an LT1 harness / PCM
> with a TPI motor (TPI still has the Dizzy).
>
> You could possibly "piggy back" your PCM with a second ECM and have your
> PCM drive the tranny, and the ECM drive the TPI... Feed your PCM the
> right inputs (VSS, etc) and it should control the tranny correctly. Rats
> nest of wires, though. Why don't ya just stick an LT1 in there (or even
> higher on the coolness factor, an LS1). ;^)
>
> I think you can purchase dedicated electronic tranny controllers,
> though. Do that, get a TPI setup off of a 90-92 Camaro, and you're set.
>
> Anything's doable, though, for enough money. ;)
>
> -Andrew
>
> Todd Burkard wrote:
> >
> > I just want to get an idea what I am in for Along with the other Prom 
> projects I am working on I am pondering the Idea of converting my 94 GMC 
> 4x4 to a TPI or SFI setup. Has anyone done this type of conversion on a 
> pickup that has the Electronicaly controled tranny? I was thinking maybe 
> a harness and computer out of a 93 or a 94 Camaro.
> >
> > Thanks,
> > Todd


        I am not that familiar with the 94 setup but if it is similar to 
some of the older ones with 2 injectors and (supposedly ) 2 drivers  all 
that is required is to change the drivers to handle 4 TPI injectors and 
radically decrease the injector on time and i think more injection events 
per rev.  The tranny code can be left as is.
        This approach will allow the use of the stock wiring harness with 
a few splices but may be too much of a difficult software change .  you 
will have to determine which rout you can do the easiest
                Todd Israels


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