Silicon Chip had a programmable ignition using a PIC ..... You may want to
look at the article.
The kits are still available, or the code may be of interest to you!
http://www.picnpoke.com/projects/ignition.html
Hope this helps

____________________________________________________________________________
________________________________________________________
          Gareth Bennett      garethb@es.co.nz
          Systems Engineering    (LMR Group)
          Otago/Southland Region
          New Zealand
-----Original Message-----
From: John Pearson <xero@CMC.NET>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Tuesday, 2 May 2000 15:42
Subject: Ignition timing control


>I am thinking of ways to control the ignition timing advance curve of a
>car. I was thinking that I might time the amount of time between cylinder
>firings and divide that number by 360. Then I would know when to fire the
>next cylinder after checking with a lookup table for the programmed curve.
>
>Is there a better or easier way?
>
>Thanks
>
>John
>