Yan, I tested my latest wing design. I drove my car 50 miles. I averaged 75 mph. My temp. went to 195 degrees then the fan came on and my temp settled at 180 degrees. At idle I was about 160. It was 80 degrees outside when this test was done. See pictures of my new design at my web site at:
Toy-Jet.com Reference page 2, titled New Design 2012. Thanks.