Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#11
08-28-2007, 09:33 PM
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Re: 1968 z28 fan blade
Darn, and I was still stuck on the reference to hole diameters! ;-)
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#12
08-30-2007, 08:05 PM
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Re: 1968 z28 fan blade
i think air much like water, can cavitate if the blades were all spaced the same, i think the odd spaced blades move more air??
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Rich Straub raiv 69 judge, ra3 70 judge, 71 judge,74 SD trans am,71 cudas, 67 189 Corvette roadster, Quicksilver 68 HURST z-10 396 camaro, 69 HEMIBEE
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#13
08-30-2007, 08:20 PM
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Re: 1968 z28 fan blade
My guess on the spacing would be for reduced vibration or noise levels. The odd spacing would break up beat frequencies caused by the fan turning through still or moving air.
Mike
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#14
08-30-2007, 08:58 PM
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Re: 1968 z28 fan blade
Thanks for the responses. Why do the aftermarket fiberglass and flex fans have equally spaced blades?
James
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1968 Beaumont SD396
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#15
08-30-2007, 10:24 PM
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Re: 1968 z28 fan blade
[ QUOTE ]
My guess on the spacing would be for reduced vibration or noise levels. The odd spacing would break up beat frequencies caused by the fan turning through still or moving air. Mike [/ QUOTE ] Not sure the spacing makes it quieter..the 69-70 BB Nova fans have the same type of staggered setup..they make a lot of noise!!!....most guys took them off back in the day and installed a flex fan. wilma
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro
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#19
09-08-2007, 09:57 PM
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Re: 1968 z28 fan blade
[ QUOTE ]
Hi: What are these fans worth? [/ QUOTE ] I have sold on e-bay the 4 rivet, 5 blade small hole and bolt pattern for 125.00 and the 4 rivet large hole and bolt pattern for 1200-1600.00. 5 rivet I could not give them away. I seen a nos one 5 rivet close for 100.00.
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