Hey Hanzi,
Did you read the comments / reveiws after reading the specs.? There are a few thrust figures / set ups. I also have this fan, yet unused. I also have this one, that I'm using in a scratch build. https://www.unitedhobbies.com/UNITED...idProduct=4500 For both of them I bought these motors. https://www.unitedhobbies.com/UNITED...idProduct=4480 I'd be interested in your responses. This will be my first EDF.
What are you using it in?
Good Luck
Al