Originally Posted by
finzup
I added a 3" nozzle on top of the clutch cover(above the drive clutch) so that the blower was adding cold air directly on the belt. I didn't find out untill later that the blower was pressurizing the clutch cover to the extent that unfiltered air was forced from the fresh air plenum into the engine air filter canister (I have a secondary filter on the plenum between the seats).
Any specific radial fan can only produce a volume that is associated with its rpm, air temp, density and system pressure(impedence). Volume is what we need to cool the clutch. Adding the blower increased volumetric capacity. And, yes, velocity increased but only because of the blowers pressure capability.
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