I'm at work, no time to read the whole thread. Shroud should be sealed to the perimeter of the radiator. Shroud should have some depth to it so to pull air from all the fins, being that close you are only using the fins right where the fans are. I'd bet being that close, those fans aren't pulling anywhere near their rated CFM either.
The "ranger" air dam below the radiator will cause a little more pressure in front of the radiator and create a low pressure area behind it (differential) helping draw more air through the radiator.
I think electric fans are for the track in regards to our old cars, & you can't beat a clutch & mechanical fan setup with a proper shroud for the street. Newer cars with better air control are able to use electrics.
The "ranger" air dam below the radiator will cause a little more pressure in front of the radiator and create a low pressure area behind it (differential) helping draw more air through the radiator.
I think electric fans are for the track in regards to our old cars, & you can't beat a clutch & mechanical fan setup with a proper shroud for the street. Newer cars with better air control are able to use electrics.
