I finally found my post on MBWorld when I installed the converter...definitely was AFTER the turbo. I cannot tell you what it how much it will help in our Crossfires when still supercharged. There are however, members with C32's on MBWorld that dropped a full 1/10th of a second in the 60' with the same converter. Remember, 1/10th in the 60' is 2-3/10ths on the big end.