Clutch Fan CFM - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Maeda · 08-15-2004, 06:24 PM

Anyone know what the stock clutch fan puts out CFM wise?

KA clutch fan preferably, although I don't think there's much difference.

chingon · 08-15-2004, 06:49 PM

it's hard to beat a clutch fan w/an electric one. In an fc wich is extremely similar, it puts out around 3500 cfm. I might switch back and ditch the electric.

speedyttz · 08-15-2004, 10:58 PM

Electric fans are good for stop and go traffic or drag racing. If your running your car in road racing conditions the clutch fan is a much better source of cooling. Stock OEM clutch fans can produce nearly 4000 CFM of air. Big gains in the stock unit.

*Jeff240sx* · 08-15-2004, 11:18 PM

You can only measure CFM of a clutch fan at certain rpm points. It's determined by size, blade length, width, pitch, and rpm. Seeing as a cluch fan is variable rpm, they aren't spec'd out like e-fans, which run at constant cfm, so all variables are constant.
Hope it helped. Since you're an art major, I'll re-explain in english if you'd like.
-Jeff

08-15-2004, 06:24 PM	#1
Maeda Nissanaholic! Join Date: Dec 2002 Location: Camp Snake Bite, CA RIP Posts: 2,356 Trader Rating: (0) Rides Gallery: Maeda Feedback Score: 0 reviews	Clutch Fan CFM Anyone know what the stock clutch fan puts out CFM wise? KA clutch fan preferably, although I don't think there's much difference. __________________

08-15-2004, 10:58 PM	#3
speedyttz Join Date: Dec 2003 Location: Jersey Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	Electric fans are good for stop and go traffic or drag racing. If your running your car in road racing conditions the clutch fan is a much better source of cooling. Stock OEM clutch fans can produce nearly 4000 CFM of air. Big gains in the stock unit. __________________

08-15-2004, 11:18 PM	#4
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 38 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	You can only measure CFM of a clutch fan at certain rpm points. It's determined by size, blade length, width, pitch, and rpm. Seeing as a cluch fan is variable rpm, they aren't spec'd out like e-fans, which run at constant cfm, so all variables are constant. Hope it helped. Since you're an art major, I'll re-explain in english if you'd like. -Jeff __________________ Whatup?

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08-15-2004, 06:49 PM	#2
chingon Leaky Injector Join Date: Aug 2004 Location: el paso tx Posts: 113 Trader Rating: (1) Feedback Score: 1 reviews	it's hard to beat a clutch fan w/an electric one. In an fc wich is extremely similar, it puts out around 3500 cfm. I might switch back and ditch the electric.