Fan speed

G

Gus

Member
Has anyone calculated the fan RPM for a repro 2 blade aluminium fan? I just measured the crank and fan hub pulleys and came up with about 1:1.4. ie the fan does 1400 RPM at 1000 engine RPM. I am not sure if the fan hub is the same as original.

Gus
 
The V in the aluminum fan is a little narrower than the original steel fan, so the belt rides just a bit higher. I thought the ratio was fan speed 1.5 to crank's 1 turn.
 
Thanks Tom, I agree about the narrow V. My belt rides higher and is flush with the top of the pulley so I measured the ODs of both. 1.4 makes sense given my setup, and 1.5 for the original. Thanks for the confirmation.

Gus
 
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