Quote:
Originally Posted by unruhjonny
I don't think there ever was a factory seven blade flex fan;
As I have come to understand, this is how Pontiac V8 fans were:
- 4 blade fixed
- 5 blade flex
- 7 blade fixed; clutched
It is also worth noting that generally speaking the different fans used different spacers.
The four blade pictured above does have a spacer that I generally associate with the flex fans...
I am very glad that I posted here, because this has been a great discussion so far!
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Disagree, have owned 2 of the factory 7 blade variable pitch, ie, flex fans. The factory 7 blade flex fan is just not something that is commonly run across.
4 blade......................19" diam 2 5/16" pitch #97xxxxx (later replacent is 9798940)
5 blade var pitch.........19" diam 2 5/16" pitch #9791346
(first use '67 models, a few made it onto '70 model GTO's before replaced by 480033)
7 blade var pitch.........19" diam 2 1/2" pitch #9796135 (HDC usage, have only found on big cars)
Not even going to get into all the different 7 blade different diam AC fans, too many styles.