11.8x at 116.xx for a SLK is strong. Believe it or not, your car is 100 lbs heavier than a "Chrysler". Mine weighs 3300 with me in the drivers seat. Grip proved a 3:27 is worth at least .2. I'm looking, patiently, for a cheap one and you should too. I ran stacked one day and one day only. That day I improved from a best of 12.01 to 11.992. (117.xx) But I iced the engine for the first and only time too. So I can't give the credit to the extra boost. I may be wrong but my opinion is a well tuned 178 is equal to running stacked because of the horsepower required to spin the supercharger outside it's efficiency range. Guran says otherwise. Please keep pushing, that's how we all learn and understand how to get the most out of our cars.

Les