Does this thing really push 640 cfm's? that seems extremely high for that style fan.

It seems that every seller, of this style of fan, lie through their teeth about the cfms, and can't seem to get their numbers straight. Also, the 4 and 5 star reviews look more like paid reviewers, than people who actually use the fans. They are built cheap, and usually last from a couple of weeks, to at most, a couple of years. Which honestly, for a 21 dollar fan, you can't complain. I'd recommend either going by the vehicle manufacturer's recommendations or ask a mechanic for a recommendation.

Can this be used with a fan speed controller? (Will it run on a range of 5-12v?)

Yes fan speed controller works great. You can even reverse it.

How much does its CFM drop if it's installed to push air?

no cfm drop ,just turn over fan blade

What are the measurements of the shroud?

Don't know, I returned it because it only pushes air in one direction. The blades weren't straight cut, they were pitched.

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6 Inch Slim 650CFM Radiator Cooling Fans Universal Slim Pull Push 12V 80W Direct Replacement Electric Fan with Mount Kit

6 Inch Slim 650CFM Radiator Cooling Fans Universal Slim Pull Push 12V 80W Direct Replacement Electric Fan with Mount Kit

Product ID: 207169557

Details

Brand
Fekuar
Compatible Devices
Engines
Cooling Method
Air
Material
Metal Plastic
Maximum Rotational Speed
2250 RPM
Noise Level
50 Decibels

⚡80W efficient 12V motor

🌀650 CFM airflow power

📏6-inch ultra-slim profile

214.23 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay cool, stay ahead with the ultimate slim fan upgrade! 🌀

QUIET EFFICIENCY - Operates at a low 50 dB noise level, balancing power with peace.
COMPACT POWERHOUSE - Slim 6-inch design fits tight engine bays without compromise.
DUAL ACTION FLEXIBILITY - Push or pull installation for ultimate cooling versatility.
UNIVERSAL COMPATIBILITY - Fits a wide range of classic and hot rod engines for seamless upgrades.
HIGH PERFORMANCE AIRFLOW - Delivers a robust 650 CFM to keep your engine running cool under pressure.

The 6 Inch Slim 650CFM Radiator Cooling Fan by Fekuar is a high-efficiency, universal electric fan designed for tight engine spaces. Featuring a powerful 650 CFM airflow, 80W 12V motor, and a slim 2.55-inch profile, it supports both push and pull configurations. Compatible with a broad range of classic and hot rod engines, it ensures optimal cooling for your radiator, A/C, and transmission systems while maintaining quiet operation at 50 decibels.

Specifications

ASIN	B087TF2N2S
Air Flow Capacity	650 Cubic Feet Per Minute
Best Sellers Rank	#42,592 in Automotive ( See Top 100 in Automotive ) #43 in Automotive Replacement Engine Fans
Brand	Fekuar
Brand Name	Fekuar
Compatible Devices	Engines
Cooling Method	Air
Customer Reviews	4.5 out of 5 stars 673 Reviews
Item Dimensions L x W x H	8.46"L x 8.07"W x 2.55"H
Item Weight	1 Ounces
Manufacturer	Fekuar
Material Type	Metal, Plastic
Maximum Rotational Speed	2250 RPM
Model	UB0614
Noise Level	50 Decibels
Number of Items	1
Part Number	UB0614
Power Connector Type	3-Pin
Product Dimensions	8.46"L x 8.07"W x 2.55"H
Unit Count	1 Count
Voltage	12 Volts
Wattage	80 watts

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