Re: Off idle transistions

["Dominic Sorresso" <surrexi2@home.com>]

Shannen,

Where do you find the injector constant? I was looking through the tables
using Tunercat and could not find
the designation for that.

Dominic
----- Original Message -----
From: "Shannen Durphey" <shannen@grolen.com>
To: <gmecm@diy-efi.org>
Sent: Tuesday, August 15, 2000 6:48 PM
Subject: Re: Off idle transistions


> Dominic Sorresso wrote:
> <snip>
> > Also, cold start
> > seems to be richer than necessary until it goes into CL.
> >
> > Dominic
> Dominic, I've never seen a crossfire car that didn't run rich in OL
> with the original ecm.  Most are so rich that they will foul one or
> even two plugs.  It would make sense to think
> TC is using the stock calibration as a base for their fuel and spark
> tables.
>
> Regardless, when I converted my pickup xfire to 7747, I found that the
> stock (7747) fuel tables for low MAP were very close, but that I've
> had to add additional fuel to prevent backfire during acceleration,
> when not in pe.  I started with a stock 350 cal, changed the injector
> constant, and went from there.  One other thing I did was collect as
> many manual trans 7747 calibrations that I could,  plugged each one
> into the truck, and picked the one that idled the best.  Something
> about re-inventing the wheel... From there I set the injector constant
> so it matched my engine displacement and injector size, and started
> driving around.  I kept track of bl and integrator #'s, and moved the
> injector value a little bit more to reduce the CL corrections.  After
> that, everything has been done in fuel and spark tables.
>
> At this point I'm wishing that I'd had springs added to the 57 spec
> clutch.  She'll start to slip if I'm not careful.  It was never meant
> to be this way...
> Shannen
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