trive2: Have you got any further with this? Interestingly enough, it seems the Z4 does not have an AC condenser fan like us. So this one 600w fan is both the engine and ac fan. It would surely be enough cooling for us then coupled with our electric fan up front. Although, in theory, we could eliminate it completely and just run the Z4 fan.
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03 Carbon Black X5 4.4 - Parts Hauler/Daily
02 Carbon Black M3 6MT - Fun Car
456whp/312wtq @ 8psi, No #'s yet at 9psi
4.10 / Headers / ESS VT2-550+