Re: Off idle transistions

[Shannen Durphey <shannen@grolen.com>]

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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