I am running a 05 4.8L in my 55 I just switched to a bigger turbo and went ahead and changed stock cam out also. I went and did little driving today and made a couple test hits. But in my test hit for some reason right after it shifts to 2 the timing is dropped way down even into the negative numbers. I thought I had it figured out and noticed I was going over the cylinder airmass 1.20 on the chart and figured that was the problem. So started searching to figure out how to re scale it which I aint figured out. But during my searching everything I read said timing is supposed to follow what is in 1.20 so figured I need some help. Here is my current tune and log showing the negative.