this is not nesasarily temp $.i have the big Be Cool rad.2 spal fans mez.55 elect pump stock housing.msd 6al and pro billit dist.my fans come on at 205 degs at idle,when they do my rpm,s drop by 400 then when it cools back to 180 and the fans shut off it jumps back up 400 rpm.i have to set my idle at 1500 when the fans come on it idles 1100,ingear 900.