I run mine 190 all the time(190 thermostat)
17lb,cap prevents boilover when it gets to 215.
the elect. fans kick in about 200 but sometimes it gets a little hotter. No effects after 3 years. I noticed my wifes car was running 245 and got nervious till I read the owners manual. Northstar engine is designed to run that way.
Did you notice Jeff Gordon this weekend? I know that is a special engine but he ran a bunch of laps at 265 and won the race
