GM TBI V6>V8 Engine Swap

[peter paul fenske]

Hi John

If you stick with the TBI and go to the V8 all you
need is the calpak... The throttle body is different
as is the distributer but everything else is the same..

The calpak for a truck costs 50$ canadian

GL:peter

At 11:07 PM 7/5/97 -0400, you wrote:
>I'm embarking on an engine swap for a V6 Astrovan that currently uses a
>1227727 ECM.  I have confirmed that this same ECM is the same as used on
>90-91 TBI V8's.  
>Will I need to replace both the CalPak AND the PROM?
>
>What is stored on the Cal-PAk what is in the PROM?
>
>What happens if I don't change either? 
>Can I at least start the V8 engine with the V6 chips?
>
>
>I'm staying close to a stock TBI except that 
>I will be using a mild Hyd Roller Cam (210/214dur).
> Will I need a "custom" chip, or would a "stock" chip be able to learn
>that much of a change?
>
>I also have the large 2" TBI unit from a Big Block TBI available to play
>with....might this be a useful addition?
>
>
>Is any of the info or SW for programming these systems "public domain"
>or at least real cheap?
>
>Failing that, a recommendation (or a volunteer) to furnish whatever it
>is that I will need would be greatly appreciated.
>
>Sorry for all the questions, but I figure if anyone out there can answer
>one, they can probably answer the rest (vbg)
>
>