[Gmecm] Port injector wiring

[Curtis W. Moore]

Opps. Sorry. :( I was actually thinking about the 1227747. You can
disregard my post.

Curtis

--- Robin Handley <Robin at FuryWorld.fsnet.co.uk> wrote:

> Curtis,
> 
> You've worried me! The information that I've been using - a printout
> of
> http:///www.customefis.com/GMEFIDIY.html (which isn't there anymore
> as it is
> now a pay site) says that the 1227730 and 1227727 are port EFI ECMs,
> that
> 'port EFI ECMs fire all 8 injectors once every revolution (usually)',
> and
> that 'port ECMs use saturated, or high impedance injectors'.
> 
> So, I'm still confused as to how to wire up my 4 port injectors
> (which, as
> you guessed, are high impedance Bosch ones).
> 
> Thanks,
> 
> Robin
> 
> ----- Original Message -----
> From: "Curtis W. Moore" <cmoore440 at yahoo.com>
> To: <gmecm at diy-efi.org>
> Sent: 26 April 2006 01:18
> Subject: Re: [Gmecm] Port injector wiring
> 
> 
> > Robin,
> >
> > This is my first post. I've been hanging for awhile just reading.
> I'm
> > am interested in your post, and hope others chime in. I too am
> > interested in using a 1227727 to run a 4 cyl port engine. Here is
> some
> > of the high points as I have learned. Hopefully learned right. :)
> >
> > 1227727 uses low-Z injectors. You will most likely be running
> high-Z. I
> > don't think this will be a problem. See what everyone else says.
> >
> > 1227727 pulses the injectors every other ignition event. That
> should be
> > 4 times for 2 revolutions of the crankshaft. (8-cyl)
> >
> > Factory 8-cyl engines use what I think is called a "split plane"
> > manifold. One injector will feed 2-cyl on left bank, and 2-cyl on
> the
> > right. One pin would not feed one bank, and the other another bank.
> One
> > pin would feed half the engine, and one pin the other half. I would
> > have to see a manifold to tell you exactly what cyl are being fed.
> >
> > I think I will wait for others at this point. This should be enough
> to
> > start out with. If I haven't explained myself very good, I will be
> > happy to elaborate further.
> >
> > Curtis
> 
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> 


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