fan shroud - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jklonowski · 04-10-2009, 08:49 PM

hey i was wondering my truck doesn't have a fan shroud and i just had a 383 stroker with vortec heads built and put in. he told me that if i didn't have a fan shroud it was going to run hot in the summer time. i was wondering if this was true. he said the fan would not be able to draw enough air off the radiator because there is too much of a gap between the two. if this is true can anyone help me out?

Square84 · 04-10-2009, 09:55 PM

yes you do need to run a fan shroud for the cooling system to work properly

**old Rusty C10** · 04-10-2009, 10:03 PM

years back i had a elcamino that wouldnt cool right because the shroud was missing... added a shroud and problem fixed

*78 Chevyrado* · 04-10-2009, 10:11 PM

Think of it like this: you want to drink from a glass of water. If you use a straw (shroud) the water comes right up. But if you use no straw and just suck at the water from above the glass you get no water (airflow). the shroud is the straw the fan uses to get airflow through the radiator.

On some cars though you will be ok with no shroud IF the fan blades are at a distance of one inch or less from the radiator fins, though that way it won't pull air from the outer corners.

3r!c84 · 04-10-2009, 11:08 PM

Quote:

Originally Posted by jklonowski

hey i was wondering my truck doesn't have a fan shroud and i just had a 383 stroker with vortec heads built and put in. he told me that if i didn't have a fan shroud it was going to run hot in the summer time. i was wondering if this was true. he said the fan would not be able to draw enough air off the radiator because there is too much of a gap between the two. if this is true can anyone help me out?

around how much hp is that 383 puting out with them heads?

jklonowski · 04-11-2009, 05:16 AM

thanks guys for the help. does anyone know a website or something that might sell them? and not to sure on the exact horsepower but he told me around 375-400.

Turbo85GMC · 04-11-2009, 01:55 PM

Quote:

Originally Posted by jklonowski

...does anyone know a website or something that might sell them?

I know that LMC sells them. Other people may chime in with other vendors too.

powerdriver 1958 · 04-11-2009, 02:02 PM

just hit your local salvage yard

73chevyman · 04-11-2009, 09:09 PM

78 chevyrado hit the nail on the head never would of thought of it that way but that was good explanation lol

piecesparts · 04-11-2009, 09:21 PM

Have you considered an electric fan setup with their own shrouds?

babyJay · 04-12-2009, 08:46 PM

Quote:

Originally Posted by piecesparts

Have you considered an electric fan setup with their own shrouds?

I was thinking the same thing (althought I havn't done it myself YET). You'll free up several ponies at the same time!

piecesparts · 04-12-2009, 10:54 PM

I have done the electric fans on my 84 truck and also my 91 work truck. The fans are worth some HP and also MPG.

*nekkidhillbilly* · 04-13-2009, 05:42 AM

i vote e fans

camaro fans are great

Manbearpig · 04-13-2009, 05:44 AM

I have no fan shroud or a fan in my K5

babyJay · 04-13-2009, 09:43 AM

Quote:

Originally Posted by Manbearpig

I have no fan shroud or a fan in my K5

04-10-2009, 08:49 PM	#1
jklonowski Registered User Join Date: Feb 2009 Location: franklin kentucky Posts: 70	fan shroud hey i was wondering my truck doesn't have a fan shroud and i just had a 383 stroker with vortec heads built and put in. he told me that if i didn't have a fan shroud it was going to run hot in the summer time. i was wondering if this was true. he said the fan would not be able to draw enough air off the radiator because there is too much of a gap between the two. if this is true can anyone help me out?

04-10-2009, 09:55 PM	#2
Square84 I don't think these pills work Join Date: Apr 2008 Location: burkburnett,Tx Posts: 626	Re: fan shroud yes you do need to run a fan shroud for the cooling system to work properly __________________ SQUARE84 90 SUBURBAN

04-10-2009, 10:03 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,277	Re: fan shroud years back i had a elcamino that wouldnt cool right because the shroud was missing... added a shroud and problem fixed __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

04-10-2009, 10:11 PM	#4
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: fan shroud Think of it like this: you want to drink from a glass of water. If you use a straw (shroud) the water comes right up. But if you use no straw and just suck at the water from above the glass you get no water (airflow). the shroud is the straw the fan uses to get airflow through the radiator. On some cars though you will be ok with no shroud IF the fan blades are at a distance of one inch or less from the radiator fins, though that way it won't pull air from the outer corners.

04-11-2009, 05:16 AM	#6
jklonowski Registered User Join Date: Feb 2009 Location: franklin kentucky Posts: 70	Re: fan shroud thanks guys for the help. does anyone know a website or something that might sell them? and not to sure on the exact horsepower but he told me around 375-400.

04-11-2009, 02:02 PM	#8
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: fan shroud just hit your local salvage yard

04-11-2009, 09:09 PM	#9
73chevyman Registered User Join Date: Nov 2008 Location: Lusby, MD Posts: 563	Re: fan shroud 78 chevyrado hit the nail on the head never would of thought of it that way but that was good explanation lol __________________ http://67-72chevytrucks.com/vboard/group.php?groupid=37 73 C10 Fleetside If it ain't a Chevy it's foreign http://hotridesmag.com/

04-11-2009, 09:21 PM	#10
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: fan shroud Have you considered an electric fan setup with their own shrouds?

04-12-2009, 10:54 PM	#12
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: fan shroud I have done the electric fans on my 84 truck and also my 91 work truck. The fans are worth some HP and also MPG.

04-13-2009, 05:42 AM	#13
nekkidhillbilly Account Suspended Join Date: Apr 2009 Location: hazard, ky Posts: 1,674	Re: fan shroud i vote e fans camaro fans are great

04-13-2009, 05:44 AM	#14
Manbearpig Registered User Join Date: Mar 2009 Location: Midland, Tx Posts: 418	Re: fan shroud I have no fan shroud or a fan in my K5 __________________ 1972 GMC C10



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