the 180* is optimal for performance. A 160 can cause cylinder wash. An open Tstat would likely be worse. There is a thread on here with links to charts and several good opinions on this subject. It's not particularly about the amount of flow, but when. No thermostat would be worse than a 160. That just can't be good.
It make the best use of any thermostat, your fan settings should be cheanged to compliment which ever one you choose. I was using a 180* drilled during the summer and a 195 during the winter. Now I'm just running a 180 year around.
LOL look at what I found. http://www.grandprixforums.net/f14/w...-get-2240.html
