1 inch vs 1 1/4 tubing in rad

thanks sniper. i already have the water wetter and a 180 degree thermastat. car runs on the highway on 80 to 90 day around 190 to 200 but when you hit a hill or traffic it starts going on over fairly quick. i am not running a shroud though just a perma cool 16 electric fan that flows 2950 cfm. thanks for the imput, all info or personnel experiance is a blessing to me to help with any prob i have. :thumbup: