Electric Fan Size help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

remist17 · 11-18-2010, 09:03 AM

Well I have built a 383 and started it last night. Was going to break in the cam and brought the RPM up to 2000. The 5 paddle fan that I had secured to the water pump broke sending it into the radiator and destroyng the radiator, shroud, crank pully and water pump.

So the rebuild begins! I am going with electric fans now but not sure what size CFM the truck needs. Can someone advise what size fan I need to run and the best place to purchase them from

1987 Chevy R10, 383 stroker, Comp Cam 280H, Vortec heads, Airgap intake with a Holley 4160.

remist17 · 11-18-2010, 05:10 PM

Bump for some help... Looking for the CFM need for a v8 motor and a good fair place to purchase.

swb85 · 11-19-2010, 09:27 AM

I run a cheapie 16" single s-blade fan that I got off ebay and an aluminum shroud. Keeps my 383 cool with the a/c on high in 100F+ ambient temps.

remist17 · 11-19-2010, 09:31 AM

SWB could you advise what make it is? I will try and located something similiar.
Thanks
Any other suggestions?

piecesparts · 11-19-2010, 09:40 AM

I am running a 383 with electric fans. I chose the dual 11" fans that comes from SPAL. I bought mine off of Summit Racing under the "Be Cool" dual fans identifier. The fans are rated at 2850 CFM each and normally I only have to run one, but it is always nice to have another available if needed. I also run this fan setup on my DD (91 Chevy Silverado with a 5.7 liter engine).

swb85 · 11-19-2010, 10:24 AM

Quote:

Originally Posted by remist17

SWB could you advise what make it is? I will try and located something similiar.

I'm not sure what brand it is, I got it from seller "skipwhite" on ebay. It came in a plain white box, but it's been in the truck for over 4 years and 35k+ miles and hasn't skipped a beat.

remist17 · 11-19-2010, 11:32 AM

Quote:

Originally Posted by piecesparts

I am running a 383 with electric fans. I chose the dual 11" fans that comes from SPAL. I bought mine off of Summit Racing under the "Be Cool" dual fans identifier. The fans are rated at 2850 CFM each and normally I only have to run one, but it is always nice to have another available if needed. I also run this fan setup on my DD (91 Chevy Silverado with a 5.7 liter engine).

Well these seem to be less than the ones I have been looking t.
So I guess I dont need the 5000 cfm they are trying to sell me

KQQL IT · 11-19-2010, 03:23 PM

I used a grand cherokee fan in the stock shroud keeps my 406 cool on 100* days

gchemist · 11-19-2010, 10:37 PM

When using electric fans, max is the best. A Mark VIII fan, jeep or Viper fans work the best. Best options include, dual speed or variable (with a speed controller). I rund dual LS1 fans from a 2000 Camaro.

Mark VIII article: http://www.fordmuscle.com/archives/2...cfan/index.php

remist17 · 11-22-2010, 12:45 PM

ok I will try and see what I can find

11-18-2010, 09:03 AM	#1
remist17 Registered User Join Date: Jul 2009 Location: PA Posts: 406	Electric Fan Size help Well I have built a 383 and started it last night. Was going to break in the cam and brought the RPM up to 2000. The 5 paddle fan that I had secured to the water pump broke sending it into the radiator and destroyng the radiator, shroud, crank pully and water pump. So the rebuild begins! I am going with electric fans now but not sure what size CFM the truck needs. Can someone advise what size fan I need to run and the best place to purchase them from 1987 Chevy R10, 383 stroker, Comp Cam 280H, Vortec heads, Airgap intake with a Holley 4160. __________________ 2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops.

11-18-2010, 05:10 PM	#2
remist17 Registered User Join Date: Jul 2009 Location: PA Posts: 406	Re: Electric Fan Size help Bump for some help... Looking for the CFM need for a v8 motor and a good fair place to purchase. __________________ 2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops.

11-19-2010, 09:27 AM	#3
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: Electric Fan Size help I run a cheapie 16" single s-blade fan that I got off ebay and an aluminum shroud. Keeps my 383 cool with the a/c on high in 100F+ ambient temps. __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

11-19-2010, 09:31 AM	#4
remist17 Registered User Join Date: Jul 2009 Location: PA Posts: 406	Re: Electric Fan Size help SWB could you advise what make it is? I will try and located something similiar. Thanks Any other suggestions? __________________ 2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops.

11-19-2010, 09:40 AM	#5
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: Electric Fan Size help I am running a 383 with electric fans. I chose the dual 11" fans that comes from SPAL. I bought mine off of Summit Racing under the "Be Cool" dual fans identifier. The fans are rated at 2850 CFM each and normally I only have to run one, but it is always nice to have another available if needed. I also run this fan setup on my DD (91 Chevy Silverado with a 5.7 liter engine). __________________ Frank

11-19-2010, 03:23 PM	#8
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,316	Re: Electric Fan Size help I used a grand cherokee fan in the stock shroud keeps my 406 cool on 100* days __________________ " That didnt make it any newer " " Dont antique the equipment "

11-19-2010, 10:37 PM	#9
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Electric Fan Size help When using electric fans, max is the best. A Mark VIII fan, jeep or Viper fans work the best. Best options include, dual speed or variable (with a speed controller). I rund dual LS1 fans from a 2000 Camaro. Mark VIII article: http://www.fordmuscle.com/archives/2...cfan/index.php __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

11-22-2010, 12:45 PM	#10
remist17 Registered User Join Date: Jul 2009 Location: PA Posts: 406	Re: Electric Fan Size help ok I will try and see what I can find __________________ 2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops.



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