Electric Fan Choices

KURT GROSS · 01-13-2013, 02:58 PM

Need to puchase an electric fan and would like everyone's opinion on what brands/models are good or bad. Is for a 1970 Nova with stock radiator. Also does running a relay make a big difference? I control it manually through a switch in a Painless wiring panel.

Thanks
Kurt

Bob Gullett · 01-13-2013, 03:36 PM

I just bought one of these. 3000 CFM
http://www.summitracing.com/parts/hfm-zfb16s
http://www.summitracing.com/parts/hfm-zfpl2

Ed Wright · 01-13-2013, 04:09 PM

Kurt, for sure use a relay.

Wade Mahaffey · 01-13-2013, 05:04 PM

Here is what I use, the shroud is the most important component. If you place a fan of the typical style (black plastic screen housing with wire ties thru the radiator type) the fan pulls/cools only the footprint of the fan circle. That is about half of the radiator, you can do the math on it A) find sq. in. of the rad L X H. B) Now find the sq.in. of the round fan: Dia sq X .7854 Example for 16" fan: 16 X 16 X .7854 = 201.06. That normally will show that only about half of the radiator has fan advantage. With a custom built shroud, you will draw air thru 100% of the core and cool in half the time. Normally with an electric water pump, a car running at 200+ can turn the engine off...run the fan and pump...and cool to 160 in 2-3 minutes....now understand that's using the Flex-a-lite 15 inch black majic fan rated @3300 CFMs and a custom shroud.

Wade Mahaffey

chris ok · 01-13-2013, 06:13 PM

Chevy HHR. costs under 100 bucks and comes w a shroud. Easy install on a 68 Chevelle. should be easy on Nova then if its a cross flow. We used painless kit.

Alan Roehrich · 01-13-2013, 06:40 PM

Northern Radiator makes a lot of electric fan and shroud kits, with relays and wiring, as well as various accessories.

01-13-2013, 02:58 PM	#1
KURT GROSS Junior Member Join Date: Feb 2004 Location: Oregon City, Or Posts: 16 Likes: 0 Liked 0 Times in 0 Posts	Electric Fan Choices Need to puchase an electric fan and would like everyone's opinion on what brands/models are good or bad. Is for a 1970 Nova with stock radiator. Also does running a relay make a big difference? I control it manually through a switch in a Painless wiring panel. Thanks Kurt __________________ 2001 Division 6 S/ST Champion 2002 Jegs Allstar 2010 Woodburn Dragstrip S/P Track Champion

01-13-2013, 03:36 PM	#2
Bob Gullett VIP Member Join Date: Mar 2002 Posts: 1,107 Likes: 57 Liked 510 Times in 117 Posts	Re: Electric Fan Choices I just bought one of these. 3000 CFM http://www.summitracing.com/parts/hfm-zfb16s http://www.summitracing.com/parts/hfm-zfpl2 __________________ 68 Chevy11 327 F/S

01-13-2013, 04:09 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Electric Fan Choices Kurt, for sure use a relay. __________________ Ed Wright 4156 SS/JA

01-13-2013, 05:04 PM	#4
Wade Mahaffey Senior Member Join Date: Apr 2007 Posts: 581 Likes: 0 Liked 18 Times in 8 Posts	Re: Electric Fan Choices Here is what I use, the shroud is the most important component. If you place a fan of the typical style (black plastic screen housing with wire ties thru the radiator type) the fan pulls/cools only the footprint of the fan circle. That is about half of the radiator, you can do the math on it A) find sq. in. of the rad L X H. B) Now find the sq.in. of the round fan: Dia sq X .7854 Example for 16" fan: 16 X 16 X .7854 = 201.06. That normally will show that only about half of the radiator has fan advantage. With a custom built shroud, you will draw air thru 100% of the core and cool in half the time. Normally with an electric water pump, a car running at 200+ can turn the engine off...run the fan and pump...and cool to 160 in 2-3 minutes....now understand that's using the Flex-a-lite 15 inch black majic fan rated @3300 CFMs and a custom shroud. Wade Mahaffey

01-13-2013, 06:13 PM	#5
chris ok Senior Member Join Date: Jul 2002 Location: Long Island, New york Posts: 592 Likes: 131 Liked 46 Times in 29 Posts	Re: Electric Fan Choices Chevy HHR. costs under 100 bucks and comes w a shroud. Easy install on a 68 Chevelle. should be easy on Nova then if its a cross flow. We used painless kit.

01-13-2013, 06:40 PM	#6
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,123 Likes: 1,581 Liked 1,874 Times in 422 Posts	Re: Electric Fan Choices Northern Radiator makes a lot of electric fan and shroud kits, with relays and wiring, as well as various accessories. __________________ Alan Roehrich 212A G/S