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Discussion Starter #1
How deep should the fan be in the shroud? Right at the edge of the shroud or deeper (closer to the radiator)? Which way cools a hot engine best?
Ron

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70 Chevelle SS396, 66 Nova SS, 95 Z28 Convertible. Aces 3081, TC #54 Gold
 

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Several people advised me (while I was shopping for a better cooling) that the fan should be half in and half out of the shroud. I will tell you that I had a stainless shroud made that my fan is completly inside, and the car runs really cool now. Make sure the shroud/fan pulls air through the entire radiator. That is vital.

Not overheating anymore....

Pat
'70 SS396
'99 WS6 30th Ragtop
 

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Ive always read that the fan blades should extend about 3/4" into the shroud.

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70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
55 chevy prostreet
 

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I have heard anywhere from 1 inch to 1/2 inch inside the shroud. About 1/2 or 3/4 of the fan blade should show.

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71 malibu 350/350
 

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On those early cars the fan shroud should cover 75% of the fan.

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Leo Paugh
Maryland Chevelle Club #017
Those who do the world's real work don't usually wear ties.
 

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I've heard a bunch of things from several racers and radiator guys. Most of the advice I got falls into the following summary. Fixed or solid blade type fans should be 2/3 to 3/4 of the way inside the shroud, flex fans should only be 1/3 and up to, but not more than, 1/2 way into the shroud because at higher RPM's the blades flatten out, and if they don't stay outside the shroud partially, they can cause turbulence and let less air yet through the radiator.

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Steve

72 Chevelle SS402/4sp
 

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Discussion Starter #7
Well, from what I've read here it sounds like I need a fan spacer. The fan is even with the edge of the shroud and it runs pretty warm, even in this colder weather.
Anyone know who sells spacers to move the fan into the shroud about an inch?

Ron

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70 Chevelle SS396, 66 Nova SS, 95 Z28 Convertible. Aces 3081, TC #54 Gold



[This message has been edited by ToocoolZ28 (edited 12-27-1999).]
 

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My local Advance Auto has spacers!

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Gotta have a Chevy !In Durham N.C.
Make it look the way you like it, forget what the other guys say! :D
 

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You can get all different length spacers off of other cars in the bone yard, although I doubt that brand new ones can be that expensive.

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Steve

72 Chevelle SS402/4sp
 
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