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firez
08-27-2007, 11:26 PM
Anyone have a picture of the correct 5 blade 4 rivet fan blade that was factory on a 68 Z
Charley Lillard
08-28-2007, 12:46 AM
Here you go. http://www.yenko.net/attachments/286114-P1010001.JPG
firez
08-28-2007, 02:18 AM
Thanks that is the one that was in the trunk of my z when I bought the car and the engine had a flex fan on it. Nice to know I have the correct one.
3macs1
08-28-2007, 02:36 PM
Check the hole diameter to make sure it is 2 5/8 inches. There is another fan that looks identical to this in 68 also a 4 rivit but has a smaller hole diameter and not correct for the Z.
firez
08-28-2007, 04:05 PM
I will measure it when I get home,never knew that.
Charley Lillard
08-28-2007, 06:00 PM
size...3 1/4" bolt spacing http://www.yenko.net/attachments/286214-P1010006.JPG
427.060
08-28-2007, 08:09 PM
Don't mean to change the subject here but I have always wondered why the spacing on factory fan blades is not even.
James
bigchevydaddy
08-28-2007, 08:46 PM
OK, so who taught Charlie how to use a ruler? Figuring out that measurement involves higher math!
Charley Lillard
08-28-2007, 08:47 PM
LOL...Bigchevydaddy...The ruler was to show distance from bolt centers.
Mr70
08-28-2007, 09:09 PM
Miss South Carolina couldn't have answered that any better.
Such as..
bigchevydaddy
08-28-2007, 09:33 PM
Darn, and I was still stuck on the reference to hole diameters! ;-)
HEMIBEE
08-30-2007, 08:05 PM
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?? http://www.yenko.net/ubbthreads/images/graemlins/confused.gif
Dusk Blue Z
08-30-2007, 08:20 PM
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
427.060
08-30-2007, 08:58 PM
Thanks for the responses. Why do the aftermarket fiberglass and flex fans have equally spaced blades?
James
WILMASBOYL78
08-30-2007, 10:24 PM
[ 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
Kurt S
09-06-2007, 11:57 AM
The staggered spacing was for noise.
http://www.camaros.org/coolingsystems.shtml
BARRY
09-08-2007, 05:59 PM
Hi: What are these fans worth?
BARRY
09-08-2007, 06:44 PM
5 RIVETS WITH 68 STAMPED IN
3macs1
09-08-2007, 09:57 PM
[ 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.