[Shotimes] Modifying the EEC-IV stock program parameters

[Carl Prochilo]

Ron,  I don't think the issue is really remote control programming.  What
I'm getting out of this discussion is that the stock programming is pretty
darn good.  Mark has the tools necessary to verify this.  The last set of
notes tells me that the program on a BOS SHO is fine for everything except
WOT, and he hasn't figured out a way to lean out the A/F at WOT or he
would be a happy camper.  Basically the EEC-IV never really had much in
the way of improvement.  Sure the LPM feels differently in the midrange,
but that doesn't necessarily equate to more HP or performance.

Not sure I'm ready to invest $500 in diagnostic equipment to prove this. 
But I sure would like to get a "browser" to look inside the computer to
verify all the sensor inputs are providing reasonable data.

About my LPM, the investment was made in 1999 so it's not much of a cost
issue.  The only question I have at this point is, do I want to take
advantage of it to modify some of the other minor parameters (items 3 thru
5) and leave the dynamic response (items 1 and 2) part alone.
-- 
Cheers,
Carl Prochilo
92 Ultra Red Crimson

On Sat, January 8, 2005 5:35 pm, Ron Porter said:
> Carl, "chip tuning via USPS" should have died along with a lot of other
> 20th
> century things like the hula hoop, and time has passed it by. You will get
> ATX folks that swear the chip makes the car run better because the shifts
> are harder, but it doesn't do anything noticeable.
>
> Here is an oft-told story, but from an LPM-chip standpoint. Take two SHOs:
> Mallinson's & my '89. Identical setups with basic BOS, except Don has no
> chip & the calibrated 77mm MAF, I have the 80mm MAF and LPM. We had
> "identical" peak HP of 207 on the dyno. Also (and I believe that Don still
> has a copy of my dyno chart somewhere) IIRC his car had a bit more
> midrange
> torque, and mine had a bit more HP after the 207 peak.
>
> Now, if the LPM tweaking did anything beyond controlling the 80mm MAF, it
> sure wasn't apparent. I suspect that Don's edge in midrange torque might
> have been due to the slightly earlier opening of the secondaries (which
> seems to have been proven to be counterproductive on anything but an
> all-out
> motor). All of the added timing, etc, didn't do squat. Only benefit that I
> saw was the slightly higher idle running the UDPs. At any rate, if the LPM
> had any gains, mine should have shown more versus his car.
>
> These were both good-running '89s, and the power curves matched Vadim's
> BOS
> projections exactly.
>
> As Mark mentioned, when you get to the serious mods (like Josh) and are
> beyond the parameters of the stock EEC, then play with it. Otherwise, I
> wouldn't waste my time or money.
>
> Ron Porter
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
> On Behalf Of Carl Prochilo
> Sent: Saturday, January 08, 2005 12:35 PM
> To: shotimes@autox.team.net
> Subject: [Shotimes] Modifying the EEC-IV stock program parameters
>
>
> (I can hear Ted's voice as he makes the changes to the program settings
> for these.)
>
> Let's do this is list form.
>
> 1)  adding a little spark down low, and some in the middle.
> 2)  Leaning out the WOT fuel to make a little more power up top
> 3)  maybe slightly adjusting the secondary opening
> 4)  maybe bumping up the rev limiter a few hundred rpm
> 5)  Turn on the fans a bit sooner
>
> I have 4) turned off (stock setting), items 3) and 5) active.
>
> Items 1) and 2) are also active and they most are probably the only
> settings of any significance.  I don't run my car at WOT that often (well,
> maybe a little more than I admit), so really item 1) is probably the
> biggest change.  I assume that the spark settings are what cause the LPM
> to require the higher octane fuel.  I also suspect that this change makes
> a significant difference in fuel consumption, but I won't know this for
> sure until I do some more testing.
> --
> Cheers,
> Carl Prochilo
> 92 Ultra Red Crimson
>
> On Fri, January 7, 2005 8:28 pm, Mark Nunnally said:
> Basically, for a stock or bolt-on stage SHO, this is simply adding a
> little
> spark down low, and some in the middle.  Leaning out the WOT fuel to make
> a
> little more power up top, maybe slightly adjusting the secondary opening,
> maybe bumping up the rev limiter a few hundred rpm (sometimes handy for
> open
> track, no power gained but you can carry a gear a little longer before a
> shift) raising the idle maybe if you have UDP's, or cams.  Turn on the
> fans
> a bit sooner, etc.  None of that will make a bunch of power, but can help
> a bit.
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