Fuel Delivery and Ignition Question...

[MICROYS Robert]

     I hate to re-iterate, but since the first time I receive no response to 
this question, I'll ask it again...

     I own a 1995 Nissan 200SX SE-R.   It has a 2.0L SR20DE engine in it 
with an OBD-II ECU.  Nissan in its infinite wisdom has put a speed limiter 
in my car which shuts down my engine at an indicated 184km/hr.  The vehicle 
has a pulse generating vehicle speed sensor, which first goes to the gauge 
cluster and is then passed to the ECU (I haven't gotten the 'scope on the 
signal to the ECU yet to find out what it sees)

     What I intend to do is design/create a device which sends a fixed (say 
180km/hr) signal to the ECU after I exceed 180km/hr so that I may bypass 
this cursed functionality.  I know that the ECU uses the vehicle's speed in 
its calculation for these functions and I am wondering what effect passing 
an incorrect speed of 180km/hr when I start to drive faster, say at 
200+km/hr  My question is:  How does this effect the ignition and fuel 
delivery?  Please help!

Rob Microys
rmicroys at shl.com