I have an 02 ls1 that I drag race . I logged a few runs and noticed when I am stalling the car at 2100 rpms on the starting line my timings is 42. When I launched the timing dips to 15.5 then comes right back to 26.5 and stays there. The tune is olsd. What is causing this dip? What tables should I be looking at? I can send someone my logs or tune to help me figure this out. Thanks.