RE: programmable engine management

["Scott F. Williams" <sfwilliams@home.com>]

I spoke with Electromotive today and they gave me the details about how the
TEC systems work. First off, the system can work on either MAP, throttle
position, or a blend of both. In the latter case, one can set the rpm
breakpoints where the system transitions from one to the other. The amount
of authority that one input has over the other can also be set. The tech
also explained that throttlebodies are commonly controlled with MAP without
a problem.

TEC also makes great use of the O2 sensor for tuning and for steady state
operation (cruise and idle). Like the MAP and TPS, the EGO (exhaust gas
oxygen) function is complete mappable. Sampling time and authority to make
specified amounts of corrections are adjustable.

This is a tweeker's dream! Heh heh.
--
Scott F. Williams
NJ Scirocco nut
Golf GTI 16v rallycar
Mazda 323 GTX turbo assault vehicle

Check out our rally team's website!
http://www.usrallyteam.com

> -----Original Message-----
> From: owner-scirocco-l@scirocco.org
> [mailto:owner-scirocco-l@scirocco.org]On Behalf Of Lauri Pettai
> Sent: Monday, September 17, 2001 2:46 PM
> To: Neal Tovsen; Scott F. Williams; Cheapass Ron; Scirocco-L
> Subject: RE: programmable engine management
>
>
> > So it **only** runs off of the throttle position? I'm not an
> EFI expert, but
> > that doesn't sound much different than a carburator!
>
> Back to basics, but thats it. Only the amount of gasoline is
> given electronically.
>
> > How does it know if it is running rich or lean? How does it accomodate
> > altitude, temp, or humidity changes? Only through the O2 sensor? That's
> > *after* the combustion. Shouldn't it be able to predict and
> adapt the fuel
> > settings, rather than wait for an 02 sensor reading?
>
> You have to tell him what's rich or what's lean. Intake air
> temerature is measured by separate sensor and humidity is
> somehow corrected from the temperature. Height difference
> is not measured. (Only when using MAP configuration).
>
> O2 sensor is in my case used only for monitoring and is
> never used in actual micture setting scheme. I choosed
> a bit bad place for the O2 sesor and it has heating
> problems so it does not give any accurate readings in
> my case so I'm guite happy that it is not the main
> sensor to set micture as I would melt my engine in no
> time with it.
>
> Lauri!
> '84 2.0 16v Scirocco GTX Kamei X1 Bodykit (VIN025736)
> http://www.eabc.edu.ee/~laurts/scirocco
> I finally added something new to my site!
>
>
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