on a hot day it doesn't get about 190 unless I'm driving it pretty hard. I believe the radiator was out of an 305 Iroc camaro. Does a pretty decent job cooling it. The guy I got it off of had it in a Z-28 with a 383 in it. I like that dual fan setup. I don't have them coming on sequentially I have them set up to both be on at the same time. I was pondering getting an electric water pump and running them on some sort of a timer in conjunction with the pump. but that seems like a lot of work and running relays for all that would be a pain