I have had the same troubles with over heating, after a good flogging of the car would get pretty hot, hotter than it usually has, investigated more and found a coolant leak, fixed that, tested again, same thing was happeing again, found another coolant leak, finally fixed the last coolant leak, took the car for a drive and it still is getting hot after like 5 minutes of skidding, the only thing I can out it down to is the standard fan, I had to chop about 2 inches off it to clear the cooler pipe, still had stock shroud and aftermarket radiator. Just brought some thermos gonna install them on the weekend and see how that goes with the temps, I'm hoping that this fixes the overheating issues!