Originally Posted by Mr350Z

To the hood question - I was having overheating issues at first but after adding a new OE front bumper with cut-outs to the left and right of the Nissan hamgurger and also a monster cut-out for the oil cooler, plus a new underbody tray, Greddy radiator airflow thingy and CF Seibon hood with 3 vents on each side, the car runs much more consitent temps now.

I was also worried about what temp level was OK, so I compared to Steve Millen who was running his FORD GT with us and he wasn't getting any higher than 220 hot. He thought 270 was way too high. So I did a little research and the JDM NISMO website actually has a page dedicated to their oil cooler kit, and after having it translated, their kit is supposed to keep engine oil temps at about 270F. So I figure 270 should be OK...so far no issues even at CA Speedway where we regularly hit 150 mph. Smaller, low speed tracks are a little more precarious as your RPMs are always higher and airflow is less. Either way my interior heater is set to max. Also - the position of your oil temp. sensor is important.