Loss of Power after New Fan Clutch

If you don't have an intercooler, you don't need a thermoviscous fan, which is what you have, now overdriven with an oversensitive temperature strip. You can get a bunch of that HP back by going electric if your alternator is decent capacity. But hear is a pro tip if you would like to stop the short cycling...either replace your radiator and condenser or have them professionally cleaned. The dirt those fins have accumulated since 2007 has killed the cooling stack air flow efficiency, and the slower moving air across the fan clutch has become hotter over time. When you get rid of the resistance in the fins, you will see less fan engagement. If they replaced your thermostat with the wrong one, that can cause unnecessary engagement also.