ECM calibrations for upgraded Xfire

[Dominic Sorresso]

Mike,

I appreciate your comments and Bruce's comments. That's why I signed up for
the list. There are quite a few guys out there that want to have their
Xfires run better. I made the quantum leap with the change of heads/cam and
increasing intake flow rates. I have ordered EMP-10 and eraser so I can make
changes to chip. Some issues I have aren't performance oriented but with
operation of 4+3 trans. If anybody made upgrades for Xfires they made fewer
if you have manual trans since only about 3000 Xfires were built with
manuals. The ECM programming is new territory for me and  have begun reading
the 101 basics. As I said to Bruce, I don't think that the present chip is
very far off especially since I have had the TBI units synchronized and
installed the Ram Air mod. I am looking for different bin files so this is
part of my "education" process. It would help me understand th operation of
the ECM and programming.

Thanks for your help,

Dominic
Dominic J. Sorresso
surrexi2 at home.com
630.837.7956(HO)

----- Original Message -----
From: "Mike Rolica" <mrolica at meridian-mag.com>
To: <gmecm at diy-efi.org>
Sent: Thursday, August 10, 2000 7:13 AM
Subject: RE: ECM calibrations for upgraded Xfire


> Take what bruce says seriously...he knows his crap when it comes to the
> crossfire.....
> Burn your own chip.. there is no quick and easy way to get it right., read
> programing 101 on the site, get familiar with it, and try small changes at
a
> time...
> Mike Rolica
> Plant A,
> Magnesium Products Division
> Strathroy
>
> (519)-245-4040  Ext. 244
>
>
>
> -----Original Message-----
> From: Bruce Plecan [SMTP:nacelp at bright.net]
> Sent: Wednesday, August 09, 2000 11:15 PM
> To: gmecm at diy-efi.org
> Subject: Re: ECM calibrations for upgraded Xfire
>
>
> Nope, was years ago.
> The info available now, makes my early stuff look premitive.
> If you care to spend the time, you can do a great chip for that car.
> Will take more then a chip to get the full performance out of your
> set up.
> You'll need to do 2" butterflies, remove the egr tunnel, increase
> the plenum
> volume, different injectors, to get it's full potential.
> Grumpy
>
>
>
>
> > I have posted using plain text. Do you have a bin file of the one
> u used
> for
> > the 13.7 time?
> > Thanks,
> > Dominic
>
> > From: Bruce Plecan
> > Turn off that awful script / coloring.
> > I've run a 13.7 with a cross fire.
> > Try reading tuning docs (at the FTP), and programming 101.
> > For a combo like that, you'll need to do your own chip, and just
> start
> with
> > a stock one or what ever ya bought from them.
> > Some major (yet non critical) intake porting needs done
> > Grumpy
>
> > From: Dominic Sorresso
> > I am new to your forum but it was strongly suggested by a member
> of the
> > Xfire forum that I join.
> > I recently "upgraded" my 84 Vette Xfire with a Comp Cam hyd roller
> 211/218
> > degree with .488/495 lift at 112 degree lobe separation. I also
> upgraded
> the
> > heads to the new
> > Trick Flow 23 degree aluminum heads. Also have upgraded ECM and
> TBI units
> to
> > Turbo City
> > systems ie 7747 ECM. I also have Extrude Honed manifold. On a 95
> degree
> day,
> > car ran a 14.3 at 99.7mph and pulled 253 hp at 4600rpm/307
> lbft at 4200rpm at
> the
> > rear wheels on chassis dyno. This was with stock configuration
> chip. I am
> > interested in knowing if anyone has a bin file for a combination
> similar
> to
> > this. I don't doubt that knock Sensor was causing  retard of
> timing since
> > power went south after 4600rpm. I have a Needhams EMP-10 burner
> and would
> > be interested in mainly suggested fuel and timing calibrations. I
> believe
> it
> > is running slightly rich especially at cold idle strartup and
> would also
> > like to address dis/engagement of 4+3 OD unit at higher speeds.
>
>
>
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