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Fan CFM Requirements? #1040131 07/25/11 10:07 PM 07/25/11 10:07 PM
Joined: Jan 2003 Posts: 3,831 N.E. Ohio 6bblFLASH OP master
6bblFLASH OP master Joined: Jan 2003 Posts: 3,831 N.E. Ohio	I know there are TON of variables,but what is the rule of thumb for CFM of fans to HP its trying to cool? I.E. 450 HP needs 3,300CFM etc........ May need to get electric fans for my street toy and only want to do it once. 6746786-DSC01066.JPG (62 downloads) 70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!

Re: Fan CFM Requirements? [Re: 6bblFLASH] #1040132 07/25/11 10:18 PM 07/25/11 10:18 PM
Joined: Jun 2004 Posts: 1,672 Virginia HemiStan top fuel
HemiStan top fuel Joined: Jun 2004 Posts: 1,672 Virginia	One of my cars dyno'd at 480 HP at the rear wheels. It has a stock looking copper radiator from US Radiator with a stock shroud and fan. I have driven it about 8,000 miles in the past few years. I have been driving it around in the 100 degree plus heat the last few days for several hours and it has always worked great. Stan

Re: Fan CFM Requirements? [Re: HemiStan] #1040133 07/25/11 10:55 PM 07/25/11 10:55 PM
Joined: Jan 2003 Posts: 3,831 N.E. Ohio 6bblFLASH OP master
6bblFLASH OP master Joined: Jan 2003 Posts: 3,831 N.E. Ohio	That sounds easy enough,but there isn`t room for a stock clutch-fan,only a thin flex-fan. 6746844-DSC01069.JPG (59 downloads) 70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!

Re: Fan CFM Requirements? [Re: 6bblFLASH] #1040134 07/26/11 05:29 PM 07/26/11 05:29 PM
Joined: Jan 2003 Posts: 3,831 N.E. Ohio 6bblFLASH OP master
6bblFLASH OP master Joined: Jan 2003 Posts: 3,831 N.E. Ohio	70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!

Re: Fan CFM Requirements? [Re: 6bblFLASH] #1040135 07/26/11 05:36 PM 07/26/11 05:36 PM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	DEPENDS on the condition of the motor and the quality of the rad .... PLUS whether you use the fan as a puller(best way) or pusher.

Re: Fan CFM Requirements? [Re: BeEtLeJuIcE !] #1040136 07/26/11 07:12 PM 07/26/11 07:12 PM
Joined: Jul 2009 Posts: 249 Sonora, CA 68X426 enthusiast
68X426 enthusiast Joined: Jul 2009 Posts: 249 Sonora, CA	Want to do it once? Then who cares about a formula for CFM? Buy the highest capacity you can fit. As far as I know Zirgo has the highest CFM ratings thru out all the size range. You have to determine whether you can/want to fit 12, 14 or 16 inch. Zirgo has a powerful pusher in each size. http://www.zirgo.com/catalog/ The 12 Scariest Words in the English Language: We are here from the Government and we want to help you. 1968 Plymouth Road Runner, Hemi and much more 1968 Dodge Charger, 318 and not much else 1958 Dodge Pick Up, 383 and loud 1966 Dodge Van, Slant 6 and cool

Re: Fan CFM Requirements? [Re: 68X426] #1040137 07/27/11 12:58 AM 07/27/11 12:58 AM
Joined: Jan 2005 Posts: 3,699 Newport, Mi Evil Spirit master
Evil Spirit master Joined: Jan 2005 Posts: 3,699 Newport, Mi	Quote: Want to do it once? Then who cares about a formula for CFM? Buy the highest capacity you can fit. As far as I know Zirgo has the highest CFM ratings thru out all the size range. You have to determine whether you can/want to fit 12, 14 or 16 inch. Zirgo has a powerful pusher in each size. http://www.zirgo.com/catalog/ And don't forget that you need a charging system to support those fans. Free advice and worth every penny... Factory trained Slinky rewinder.........

Re: Fan CFM Requirements? [Re: HemiStan] #1040138 07/27/11 02:11 AM 07/27/11 02:11 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Would a stock fixed blade fan fit? With a proper shroud they cool better than anything else out there.

Re: Fan CFM Requirements? [Re: DaytonaTurbo] #1040139 07/27/11 08:10 AM 07/27/11 08:10 AM
Joined: Jan 2003 Posts: 3,831 N.E. Ohio 6bblFLASH OP master
6bblFLASH OP master Joined: Jan 2003 Posts: 3,831 N.E. Ohio	Quote: Would a stock fixed blade fan fit? With a proper shroud they cool better than anything else out there. Gonna try one 70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!

Re: Fan CFM Requirements? [Re: 6bblFLASH] #1040140 07/27/11 09:03 AM 07/27/11 09:03 AM
Joined: Dec 2004 Posts: 5,278 San Jose, California D DennisH Vacation
DennisH Vacation D Joined: Dec 2004 Posts: 5,278 San Jose, California	Copper. Thermal. 180 superstat. Green.

Re: Fan CFM Requirements? [Re: DennisH ] #1040141 07/27/11 09:08 AM 07/27/11 09:08 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Copper. Thermal. 180 superstat. Green.

Re: Fan CFM Requirements? [Re: DennisH ] #1040142 07/27/11 11:54 PM 07/27/11 11:54 PM
Joined: Jan 2003 Posts: 3,831 N.E. Ohio 6bblFLASH OP master
6bblFLASH OP master Joined: Jan 2003 Posts: 3,831 N.E. Ohio	Quote: Copper. Thermal. 180 superstat. Green. Ok,I`ll bite. Copper = radiator or penny Thermal = underwear in Ohio 180 Superstat = Keeps score at the ballgame Green = is a color Care to elaborate? Last edited by 6bblFLASH; 07/28/11 08:24 AM. 70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!

Re: Fan CFM Requirements? [Re: 6bblFLASH] #1040143 07/28/11 02:46 PM 07/28/11 02:46 PM
Joined: Jan 2003 Posts: 28,067 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,067 Irving, TX	Quote: Quote: Copper. Thermal. 180 superstat. Green. Ok,I`ll bite. Copper = radiator or penny Thermal = underwear in Ohio 180 Superstat = Keeps score at the ballgame Green = is a color Care to elaborate? That's his standard answer to any cooling system post he sees. I've waiting for him to snap and start posting that on suspension and interior topics too. He firmly believes that a copper/brass radiator with green coolant running through a 180 degree susperstat being blown on by a thermal fan is the solution to ANY heating problem to ANY vehicle in the known universe. Little does he know, that stuff doesn't always cure every problem. It was NOT an option on my hot rod. Once you modify a car you may not be able to use factory parts. We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

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