I have been trying to come up with a way to keep ignition timing from running very low, even negative, for a period of time after startup. I've seen it in every Hemi. I know that it is used for catalyst heating, but obviously there are times where this is not relevant. I've tried all types of different changes with no change on a lot of different vehicles. I've asked HP to add some tables to help with this, but so far the tables they have added do not seem to be helping. Anyone have any ideas/thoughts on this?