I don't run super high output engine in my cars. My new W5 engine will be the most powerful that I've ever had. My TF904's have been bullet proof and deadly consistent. And ET wise I doubt that there's a automatic transmission out there that is quicker or faster. I'm sure that the guys that are running turbo charged and NO2 boosted engines making 2500 or more hp have to run a PG or Turbo 400 based transmission for the upgraded cases. But I don't look at my 904 as being a second class transmission. Because it reacts as fast and runs quicker that any other trans out there. Just MHO.