Be careful guy's, your getting into some dangerous detonation territory here recommending chages to the timing events without knowing all the details of the application.
You can go here:
http://www.4secondsflat.com/Technica...rburetion.html
and read several articles that will help understand timing events, the Mission Ignition article addresses all ignition systems and should be very helpful in determing where and why your timing events should be set at.
Study the chart I wrote on the bottom of the page, if you have any questions I'll be happy to discuss them with you
Don
503-627-0728