Re: 1968 z28 fan blade
 

Darn, and I was still stuck on the reference to hole diameters! ;-)

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?? https://www.yenko.net/ubbthreads/imag...s/confused.gif

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

Re: 1968 z28 fan blade
 

Thanks for the responses. Why do the aftermarket fiberglass and flex fans have equally spaced blades?
James

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

Re: 1968 z28 fan blade
 

The staggered spacing was for noise.
http://www.camaros.org/coolingsystems.shtml

Re: 1968 z28 fan blade
 

Hi: What are these fans worth?

Re: 1968 z28 fan blade
 

5 RIVETS WITH 68 STAMPED IN

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.