I have been trying to get some more HP out of my setup. Aside of adding more expensive hardware (coming up this winter BTW), I figure some gains could be achieved by means of software.
In 1994 GM upgraded LT1 engines EPROMS to EEPROMS, thus giving the ECM the ability
to be reprogrammed on the fly.
So, with that in mind, this is what I have playing with lately...
And the data acquisition application...
This is a nifty little application called FreeScan. It allows for real-time monitoring
of ECM parameters and a little modification of some of them.
The main purpose for this is to capture a binary file with this data so it can be sent out to someone with more knowledge in LT1 diagnostics and that can tweak the ECM better and hopefully give the LT1 a few more horsepower.
Some of the most useful screens...
Yeap, those are VDO lookalike gauges!
These parameters get updated several times per second.
You can also check and clear error codes here. This one is one that does not worry me at all.
It is pretty cool to see the way the ECM "Thinks", as is controlling the LT1. This
is specially usefull at WOT. Next is to take this same setup back to the Dyno so I can get a baseline before FieroLT1 gets another 100 extra horsepower worth of new hardware.
This Freeware works for the following GM cars among other non GM ones.
GM 1992-93 Camaro
5.7L MFI LT1 1992 IY CAR
5.7L MFI LT1 1993 IY 1,2F
GM 1994 Camaro - Impala SS - Corvette
5.7L SFI LT1 1994 1,2F
5.7L SFI LT1 1995 1,2F
GM Pontiac 3.2 (also 1991 Z-34 Lumina, 3.4L DOHC, W-Body)
3.4L PFI LQ1 1991 W Car
3.4L PFI LQ1 1992 W Car
3.4L PFI LQ1 1993 W Car
3.1L PFI LH0 1993 1W,2W,3W,4W Car
3.1L PFI LH0 1994 1W Car
GM 1989 Chevrolet Corvette
I wonder if any of this configurations might work for the stock Fiero ECM.
That way someone else can also rip the benefits of at least knowing what is going on
with their engine even if the Fiero ECM cannot be reprogrammed on the fly.
I'll keep you guys posted or visit my web site later on.
------------------
Winston Ojeda
88 Formula LT1
Milwaukee, Wisconsin, USA
http://www.FieroLT1.com
Home of the Fiero LT1
wojeda@FieroLT1.com
But not too much. Might as well give it a whirl. Next question, where to get the right cable?? Do you have to make it yourself, which I don't really have the time or inclination to do unless it's VERY easy, or can it be purchased?
