Originally Posted by Chuck33079

Get an OBD scanner or water temp gauge, then. Switch to straight water and water wetter. Then see if the water temps are in line with what you should be seeing. The stock gauge isn't linear, and it's kinda hard to tell exactly how hot it's running. A vented hood would do wonders as well, especially since rain really isn't something you should be too worried about. Given your climate, if you plan on a lot of track time Z1's power steering cooler might need to be on your list as well.

At the end of the day, gears and a better diff would make you faster around the track than swapping out bolt ons.You can switch to TPs or headers, but you'll only pick up ~10whp over the HFCs you have and it's not a cheap move once you factor in labor.