The fan shroud helps most at idle and low speeds where the air isn't being pressed through the radiator. While at idle or moving slowly it's easier for the fan to pull in surrounding air and recirculate a large amount of the hot air in the engine bay. While in a car that is in excellent condition this may not be a problem on a car whose cooling system is running poorly this could be enough to cause a significant overheating problem and may lead to damage. Actually, there are many cars where the fan shroud is an absolute necessity no matter how good the condition of the car.
Yes, the Supra has a lot of fans.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|