Ok, so you are not using any shroud at all, remember it needs one to force the air through the radiator to make a good heat exchange for it to work, if you can force more air through a specific spot (radiator) then you should get what you need, ok if i'm not mistaken you no longer have the factory shroud, you need one to maintain a constant air flow thought the engine, idling or driving the combination of the thermostat and fan clutch is essential to keep any engine cool, if I'm not mistaken you have a Spal fan-pwm to be honest have never used one how do you know when and how much to adjust it while driving, and from what I saw on the pictures I don't think you had enough back spacing on the aluminum fan shroud.