Need Input

I am trying to see if I have enough intake/outtake for a flowering tent that is size 58x58x79 inches...Setup I am thinking is one intake line for both the tent and 1000w HPS cooled hood light with a 6 in fan @ 400 CFM and 667 Max can fan for exhaust at the top of the tent that exhaust line will connect with the other side of the tent to connect with the outtake of the light and will have one more 6 Inch 150 CFM duct fan to help move thru the ducting fast to the wall do you think that is enough air to have a good cycle going? thanks for the help

Walt;

The following document was posted here a while back, and it will definitely help you. I apologize to the fellow grower who originally posted it for not being able to give due props, but I was probably stoned when I read their post

http://urbangardenmagazine.com/2010/07/planning-your-grow/

-spek

yeah I have read that so if I understand the part about sizing my flower tent is 58x58x79in (4.8x4.8x6.5 FT=149.76 Cubic ft/3=49.92) so if I did that right I need 49 CFM to cycle the air every min? thanks for help!