Quote:
Originally Posted by ValidusVentus
shrouding, also a shroud to effectively reduce the gap between the oil cooler and the heat exchanger behind it should help airflow.
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This.
Any gaps will cause the air to duck around the heat exchanger rather than flow straight.
Staying in the lower gear is surely heating things up too, as you noted.
Chuck's suggestion for a dedicated puller fan idea should certainly help.
Also, you can tune radiator fan duty cycles with uprev to come on full blast earlier -- that will definitely help out.