I had a Judson on my 190SL years ago. Not the same, of course, but it produced about 10 lbs boost and added significantly to the performance. The car really needed it. I never noticed any significant heat problems and I recall it spun just a little faster than the engine, maybe 10% or so. I wouldn't do it today, however, for 2 main reasons. First, keeping the oil drip just right was a never ending effort and second, the vanes were just too noisey. OK, maybe a 3rd reason: those side drafts with the long intake tube were a whole lot prettier.