Is it one of these? https://www.ebay.com/itm/Infiniti-G3...ts=Model%3AG35
If so it is an asymetric fan and will be much more efficient with the correct DOR.
If you go by 'rude' measurement like engine temp, wet finger, sound etc it may well appear to 'work' either way.
If you measure the actual CFM with an anemometer I'll bet 1/2 a can of flat Suffolk it is shifting heaps more cubes one way compared to t'other.
If you are bolting it to the factory fan clutch the the DoR must be correct with the 'F' to the front or you are wasting efficiency
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