If your aim is assist with the whole slow motorway traffic jam scenario, I would opine that additional airflow through the rad will provide a superior result. Be it higher CFM pullers or a third large center mounted fan. WHile I champion that more coolant flow is always better than less, it may not resolve your issue at lower sppeds and more airflow will.
More than you may want to know at http://www.spacecitypanteras.c...Cooling-JTaphorn.pdf
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