730 vs. 747

[Dan Griffin]

I managed to get a 747 to run a single injector tbi 4cyl. by swapping netres
out of a 1226867, tuning it is another matter, there are no other editor
readable 4cyl. bins to compare to that I know of..If tunercat has a
definition file for a 4cyl 730 Id go that route..As far as getting a 747 to
run 4 injectors Id have no clue..
Dan
----- Original Message -----
From: Ron Schroeder <rjs at bnl.gov>
To: <gmecm at diy-efi.org>
Sent: Friday, July 20, 2001 12:21 PM
Subject: 730 vs. 747


> Hi,
>
> I am working on my first GM ECM efi project.  I am trying to fuel inject
an
> inline 4 cyl engine that was never available in fuel injection.  So far I
> have installed and checked out the heated O2 sensor, engine temp., crank,
> VSS and MAP sensors.  The intake manifold, throttle body, 18LB injectors,
> idle valve and TPS are almost done.
>
> I want to use PFI not TBI.  I am trying to decide on the ECM to use.  I
> have mostly narrowed it down to either the '747 or the '730.
>
> I don't think that the '747 was ever used by GM for PFI but I think that
it
> is possable with external drivers.  Has this ever been done?
>
> My other choice is the '730.  Since this one has been used in both TBI and
> PFI applications I would not need to make an external driver.
>
> Which would be a better choice for a daily driver, especially programming
> wise since I am sure that the maps would not very close to any factory
ones.
>
> Thanks in advance for any help.
>
> Ron Schroeder
> WD8CDH
> E. E. S.
> wd8cdh at bnl.gov
> rjs at bnl.gov
> ron at 112motors.com
> 631 344-4561 Day
> 631 286-5677 Nite
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