Just looking at the pictures that shroud is way too far back and covering most of the fan, not a good way to cool and engine for sure. The shroud needs to be as flush to the radiator as possible, the fan needs to be 3/4" from the radiator, and sticking out of the shroud for maximum effect.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
