I was thinking heating up the air that goes through the sidepods after it has passed the coolers. This would accelerate the air and allow higher airflow through the sidepod. But as the exhaust manifolds are already placed in the sidepods i recon they allready do this to some degree.
Perhaps an exhaust manifold with passive cooling ribs on it to transfer more heat to the air. Maby thats why Renault disguised their manifolds in carbon shrouds?
But then again you wouldnt want to cool the exhaust too much as it would loose some energy before reaching the turbine.