Thanks guys. what throws me off with tuning the motors is it may be up around 260+ but still be smoking all the way down the straight. I have two C6BB's for my XT8 and I have the same type of situation. Not to mention the other night running my Matrix at 215+ and I put my hand in the exhaust and could still see fuel in there, but it was full of power when I needed it. On a 230ft straight I still had more pulling power when I had to let off to make the turn at this rich setting. I guess it's just how it runs.