Isn't ecu tune governing engaging & rpms of fan? (IIRC there was a way to tune them in OFT). If so, i guess without modding any hardware one can get much more from very same rad, w/o any ducts, without any hood/fender vents.
There is nothing tune can do with oil overheating (except cutting power down), so that's the area you should care about/improve upon.
One can improve capability of rad (not bottleneck) via ducting or hood vents .. but what's a point, if ecu tune just will engage fan later/for shorter time interval/at lesser speeds to compensate? :/
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