Hi all,

I've gone over to COS3 now, however I can't seem to make sense of the difference between High and Low spark maps by looking at other stock GM tunes.

In simplistic terms would I be safe in sorting out my high octane table and then copying that to the low octane table and applying a minus % figure across the board?? if so, would 15% sound a sensible margin?

Any thoughts?

Thanks

Jim