It would be very helpful if you would go back through this thread and answer each of the questions asked, or address the things that have been done vs just answering the last question in the list. For example, Hoss asked
Quote Originally Posted by HOSS429 View Post
when does it overheat ? as you are driving it or as it sits and idles .. it should`nt over heat going down the road even without a fan ..and hotter weather plays a big role
This is a very important point - you should not be overheating going down the open road if you have sufficient cooling area, radiator capacity and coolant flow in your system, along with a good thermostat. Dave pointed out that the diameter of the fan needs to be matched to your radiator fin area - if your radiator is only 16" wide then putting a 19" fan on it is going to require some fancy footwork on the shroud at best, and a better answer might be a higher flow, more efficient 16" fan that fits the application. Jerry has pointed out that cfm ratings can be challenging on electric fans, and that the amp draw is the best indication of what work it is doing - you'll see a cfm vs amps chart with SPAL fans for this reason. You've said that you are going to try a shroud, which I guess means that up to now your fan is mounted behind the radiator but can pull air from the path of least resistance. No offense, but you've got several people trying to help you figure out your problem, but it seems to me that the feedback loop is not working very well. If it's just me I'm sorry, but I feel like we're sort of shooting in the dark here.