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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2009 Posts: 137 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2009 Posts: 137 | The stock fan on my Grumman 292 cools well, the dash gauge moving up maybe 25% from cold. Switched over to an electric fan, a 1400CFM Hayden with an adjustable thermostat control.
The quiet was a relief, I could hear all the creaks and rattles that will be fun to try to eliminate....BUT.... the temp gauge ran right up to about 70%. The fan was set up as a pusher, and is only 100CFM less than their highest flow fan [and 1/2 the cost]. With it installed, there isnt room for mounting an additional electric fan.
Should I look into aftermarket flex fan blades? Installing a thermo clutch will require the radiator to be moved, and a new fan to be purchased. Are the flex fans quieter, with some fuel mpg and performance gains while providing adequate cooling?
Or, a firewall insulation campaign. Seriously guys, this thing is NOISY! | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The flex fans are noisier then the stock fan. 1400 is not enough. I understand they are not as effective as a pusher then as a puller. I run a 2800 CFM Flex-a-lite on my 70 with 350. Seems to work good but is noisy when it comes on.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2009 Posts: 137 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2009 Posts: 137 | I think I will go with firewall insulation. The cost of failure is negligible. | | |
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