Re: Clutch fan?
Heavy duty gives you more more air flow. You must use a heavy duty fan if using a heavy duty clutch. A heavy duty clutch lets the fan spin faster.
Standard duty clutch spins fan at around 60-70% of engine speed and most standard duty fans are rated for 4000 RPM, or around 6500 RPM engine speed max.
Heavy duty clutch spins fan 80-90% of engine speed. A heavy duty clutch with a standard duty fan is a recipe for disaster.
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
Last edited by Steiner; Mar 28th, 10 at 12:01 PM.