2 bar ECM again/still (HELP)

[Shannen Durphey]

Grasshopper... ; )

The 749 is definitely used in 3 applications sold in the US.

1) 4 cylinder Sunbird and Grand Am, w/ manual and auto trans.  Early Sunbird turbos
used a different ecm.
2) 6 cylinder Syclone/Typhoon.  Specialty truck.  If you find one in a junk yard,
_Immediately_ notify me.  I'll instruct you on what to do next. 
3) 4 cylinder 2.3L Quad 4 equipped N body cars (Olds Cutlass Calais, Pontiac Grand
Am) with auto trans.

All of these applications are speed density systems.  None are MAF based systems.
The question "... has anyone stuck the Sy/Ty code into the 730?  does it work, or
are there obstacles to big to
 overcome?" has been answered with a resounding "Yes!"

One thread which discusses this is "Turbo Project update. The good, bad and ugly." 
You may not have been on the list in late January, so you may have missed it. 
Here's the first paragraph from the first message in the thread:

> Hello Group,
>      Just an update on my progress to date with my turbo project. Background
> info: 350 chevy motor out of '74 van, two T3 turbos, TPI intake, Syty
> software running on 730, intercoolers added two weeks ago.

HTH.
Shannen


Bob Wooten wrote:
> 
> 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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