Started about a week ago. It is a high-pitch click that lasts about 1.5 seconds after I start the engine and then it goes away. The click is variable to the engine RPM's. It is definately coming from the engine bay. Any ideas?

Also, the noise my engine makes during regular operation (even before the supercharger went on) is louder than any other s2000 I have been around. It is the same sound as other engines ... just amplified x 2. Any ideas here?