2 bar ECM again/still (HELP)

[Bruce Plecan]

Yes you can run the syty code in a 730.
But you lose the Wastegate, and as I recall the TCC.
This wassa big thing before the 730 was fully hac'd.   For years the 749
code was the only one Public domained.   Still is the only PD'd 2 bar MAP
code.
No there weren't any oem 2 bar 749 apllications, thou the hac show the
select to 8 cyl..
Bruce



> I know we have just been here but I am still cornfused, please bear with
me.
>
> I spent quite a bit of time today searching the GMECM archives about this
&
> did not come up with anything remotely solid (hence question #1 about
> archives).
>
> It appears that John Gwynne (sorry if I killed your name), tried the 747
> into 730 switch for a blown V8.  however, he had problems with it that
> involved the TCC & the Boost regulator (cant recall the name of it).
>
> in one of his posts he said that he had modified the anht code to accept
the
> 2 bar map but the only purpose that it served was to be another bit in the
> ALDL data stream & that it did not do anything to control timing or IOT.
I
> don't understand this @ all.  why would he go through the pain & hassle if
> it did not do that?  there has to be another reason, or I missed
something.
>
> it appears from Grumpys posts on the topic that he does not think that
this
> is the best way to skin this cat.  if not what do you think is a better
way?
> I have looked through Ludis site & the diy site & on the
> www.diy-efi/gmecm/faq/ecm_selection.html page it lists the different ECM's
&
> which ones have hac's & so on.  it appears that there is
>
> the 749 for the 4 cyl turbo MAP,(sunbird I think)
> the 749 for the 6 cyl turbo MAF & MAP (GN/TType & Sy/Ty respectively)
> The 749 for the 8 cyl turbo MAP (what the heck is this, this is what I
> want!!!!)
>
> is the last one a boo boo?
>
>
> I guess the question that no one has really answered is, has anyone stuck
> the Sy/Ty code into the 730?  does it work, or are there obstacles to big
to
> overcome?  if that is the case is there a clean way to do this or are the
> two alternatives, buy a FelPro setup or use a FMU?
>
> I would REALLY like to hear from Bruce & John if only a short note.  thank
> you guys!!
>
>
>
>
> Bob Wooten
> r71chevy at earthlink.net
> www.r71camaro.homestead.com
>
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