I finally got the shroud mounted up and it fits great to the radiator. I dont have any pics yet but will post some on Monday night once I get back home. Its totally sealed with black foam that you would use to mount a camper top to the rear of your truck.
A few questions about theory for cooling.
First during my search and experiments to make my car run cooler I started with a 195* thermostat, then to a 180* then a 160*, then tried no thermostat and with each test once it was on the road would range up to about 200* or less and in traffic it would go up to 220* plus and very quickly I might add. All of these tests were done at between 75*-80* outside temps.
After I installed the 15" 5 blade fan and shroud and I test drove the car Friday afternoon when temps were just about 94* outside and the car ran at 185*-190* while driving on the open road. Once I would stop in traffic it would go to about 210* but when I started moving again would drop back to 185* or 190*. And it wouldnt go up as fast or as high as in previous tests. I have the 160* thermostat in the car now however I am going to change it back to a 195* on Monday and try it again.
Im thinking that with the 160* once the thermostat opens it stays open and the coolant doesnt stay in the radiator long enough to cool therefore the coolant temp continues to go up while the thermostat stays open. Im hoping that the 195* stat will allow the coolant time to cool in the radiator before the thermostat will open and close.
Am I off base on this theory?
Also my fan is all but inside the shroud, maybe a 1/4" is outside. I have no room to bring it back because I am not using a spacer at all. The only way I could get the fan to be partially out would be to cut the shroud down which would mean the shroud that is now about 2.5" deep off radiator would be 2" or less deep. It would also be a ***** to cut it down. How Important is it to have the fan outside the shroud? I can remember many cars in my younger days (mostly GM's) that the fan would be totally inside the shroud but the shroud would be 4-6 deep. Some Monte Carlos would have a long tunnel as part of the shroud. I remember having to replace water pumps on them when I turned wrenches for dad in the late 70's and 80's.
I would like to have another 10*-15* more drop in my running temp. Maybe a 180* thermostat.
I think Im on the right track!
Looking forward to your thoughts.
Rod
