My cars running hot on long journeys, a steady 80-90mph cruise sees the temps rising so the fans are on constantly... If i dissconnect the fans the temps seem to come down slightly - i guess at that speed the fans are restricting the airflow over the rad. Also i noticed, the car runs hotter when theres alot of electrical load on, IE lights on and sub cranked up... Maybe the limit of the alternator is effecting the temp/fan sensors signals?

Ive got a Radtec FMIC, Airtec rad and turbo cooler!