Quote:
Originally Posted by Miller88
Could it be cycling because it is hitting the temperature of the fan and the fan has to run to cool the car down?
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Yep. The lack of airflow to the radiator lets the motor heat up quickly and the fan kicks on to cool it down, which happens quickly as well. With no grill block at all, the temp is very stable. If you rely on a fan to cool the motor this much, much of any aerodynamic gains get consumed by the extra resistance of an alternator that is working much harder to run the fan. No free lunch with this mod. Sometime I may experiment to see what size grill opening works right. It is almost like the oem bumper was made by a bunch of engineers or something, who took all of this kind of stuff into consideration when they designed the car...