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      02-26-2014, 10:18 PM   #12
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wmandra's Avatar

Drives: 2010 328i, 2014 Z4
Join Date: Jan 2010
Location: NJ, USA

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the N20 Z4 uses the same 600W fan as the N54, so I would think the 850W fan from the 335is would a decent upgrade. Don't know about the N54, but on the N20 the JB4 has a "Max Cooling" mode which essentially runs the water pump and fan at full power all the time.
Driver, Ratchet Head Racing #93 BMW Z4
Club Organizer, Garden State Euros Motorsport Division
2014 Glacier Silver Z4 28i M Sport - See the build thread: