Thread: factory fan cfm
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Old 10-22-2019, 03:25 PM   #10
V8COOPMAN
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Default Re: factory fan cfm

Quote:
Originally Posted by drolston View Post
Pretty sure the 32 - 38 generator mounted fan was geared up with a smaller diameter pulley than the crank pulley. Have to concede that 42 - 48 are not.

Hmmm...…I'm not so sure about that, either. There's a 1934 Ford document floating-around regarding a change in fan pulley diameter from 4" to 4-5/8" to REDUCE fan speed because of excessive fan noise. You also have to remember that fans don't like excessive speed because they have a tendency to throw blades.....just ask "19Fordy". The two pulleys on this 21-stud appear to be near identical in diameter measurements. DD


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