Interesting stuff! Could someone explain the tables and graphs to me please?! I'd love to expand my knowledge in this area. I understand the 1st table with spark advance and how you would need to change that according to rpm and load, but what's the percentage indicator along the opposite axis to the rpm axis? I guessed throttle percentage but then you can't get 250% throttle, can you?

As for the next table down, I'm presuming this would be the fuelling table (by process of illimination as I know the other table is for spark!), but all I undersand of that table is the rpm key along the bottom!!

I'm scratching my head about the graphs too...

THUS, you can tell I've got no experience of mapping or aftermarket management. I'd love to learn though. I understand the principles and I'm good with computers (work in IT for a living at the mo). If someone could explain the pretty pics in the first post then that would be great