auxiliary fuel control that modifies factory ECM pulse widths

[Jason R. Haines]

Thanks for the links. The Chipstar system looks like it works like the
Dastek Unichip system someone else posted. Both systems take in the factory
sensors and modify the signals to allow tuning the engine management system
(without having to change the factory tuning). The problem is we already
have calibration capability in the factory ECM so we can make many of those
changes already. The bigger problem is that we are already at basically
100+% VE at 5 volts input for the MAP sensor (the engine we are working on
is a speed density system) so you can't fool the computer into adding any
more fuel than it already is. We need something that goes between the ECM
and the injectors and increases the duty cycle based on auxiliary inputs (in
our case a boost or 3 bar MAP input).

I spoke with a Dastek distributor and the Unichip can do what we need but
because we are running a V8 sequential system we would need 8 of their
devices (they claim to use them between the ECM and the injector on single
injector TBI applications).

Jason


> Try this one ,have no experiance with it myself exept reading the info on
the page: http://www.milford.ndirect.co.uk/chipstar.html
> They allso make a lamda sond signal pretender.
> http://www.milford.ndirect.co.uk/lsg.html
>
> Espen
>
> Ira Emus [SMTP:ira at CamaroElectronics.com] skrev 21. mars 2001 19:56:
> > At 01:38 PM 3/21/01 -0500, you wrote:
> > >Does anyone know of any auxiliary fuel control systems that can modify
> > >(increase) the factory ECM commanded pulse width (based on some other
inputs
> > >like rpm and boost, for example). I thought I remember seeing one of
these
> > >in one of the import magazines but I can't seem to find it anymore.
> >
> > Incon sells one, I assume they'll tell you what it is.
> >
> > Ira
> >
>
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