How does this happen?!
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by BanGnGearS
Yea the blades will still direct the flow in the same direction if the fan is reversed. I think i may just buy a larger electrical fan and run that an then hook up the aux fan in the correct manner to a t-stat switch.
What kind of alt do you have in the car? Most of the SI style alts won't be able to handle a big fan and an aux fan and still keep the battery fully charged. It'll drain and charge a lot more, lowing the life span of the battery considerably.
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Originally Posted by Durango_boy
What kind of alt do you have in the car? Most of the SI style alts won't be able to handle a big fan and an aux fan and still keep the battery fully charged. It'll drain and charge a lot more, lowing the life span of the battery considerably.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Like someone said, ditch the flex fan. Either rely on only electric or put a stock fan/clutch. I'm glad your problem was simple like the wrong fan. Could have been worse and more expensive.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
Originally Posted by Durango_boy
FAN BLADE 101:
The direction of the pitch will not change if the fan is removed and mounted backwards. It'll still blow the exact same way.
The direction of the pitch will not change if the fan is removed and mounted backwards. It'll still blow the exact same way.
each blade on the fan is "cupped" and designed to scoop the air and direct it ithe proper way. If you were to accidently install the fan backwards the fan itself would still be turning the same direction of course as that's dicated by the WP but the cupping and pitch of the blades would be incorrect - how could the pitch stay the same relative to the motor when it would be reversed?
Sure, it would still move some air but I'd have to figure that it would be moving signifigantly less air than if it was installed properly as the cupping and pitch of the blades is reversed.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by BarryK
how?
each blade on the fan is "cupped" and designed to scoop the air and direct it ithe proper way. If you were to accidently install the fan backwards the fan itself would still be turning the same direction of course as that's dicated by the WP but the cupping and pitch of the blades would be incorrect - how could the pitch stay the same relative to the motor when it would be reversed?
Sure, it would still move some air but I'd have to figure that it would be moving signifigantly less air than if it was installed properly as the cupping and pitch of the blades is reversed.
each blade on the fan is "cupped" and designed to scoop the air and direct it ithe proper way. If you were to accidently install the fan backwards the fan itself would still be turning the same direction of course as that's dicated by the WP but the cupping and pitch of the blades would be incorrect - how could the pitch stay the same relative to the motor when it would be reversed?
Sure, it would still move some air but I'd have to figure that it would be moving signifigantly less air than if it was installed properly as the cupping and pitch of the blades is reversed.
The cupping is semantic. Take a normal flat blade fan, and it'll move air the same way no matter how it faces.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
Originally Posted by Durango_boy
The cupping is semantic. Take a normal flat blade fan, and it'll move air the same way no matter how it faces.
Melting Slicks
Joined: Oct 2004
Posts: 2,662
Likes: 8
From: Knoxville Tennessee
Another problem I see in his picture is there is no seal between the top of the rad shroud and the hood, allowing a lot of air to flow across the top of the rad instead of thru it. This happened when the plastic air ducts were removed that supplied fresh air to the carb. Definately replace the flex fan with a GM fan.
Bernie
Bernie
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Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Originally Posted by BerniesVette
Another problem I see in his picture is there is no seal between the top of the rad shroud and the hood, allowing a lot of air to flow across the top of the rad instead of thru it. This happened when the plastic air ducts were removed that supplied fresh air to the carb. Definately replace the flex fan with a GM fan.
Bernie
Bernie
Team Owner
Joined: Aug 2006
Posts: 24,125
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From: Columbia Missouri
Originally Posted by BanGnGearS
I thought about that as well. but being that my electrical fan is mounted on the rad i figured that it wouldn't make too much of a difference? I will get a piece of weather stripping tho just to make it look cleaner..
Make it a VERY thick piece and it will function right and not just look good and clean. You'd be VERY suprised how much air goes over your radiator instead of through it at high speeds.
Thread Starter
Racer
Joined: Feb 2005
Posts: 373
Likes: 1
From: Bayonne NJ
Originally Posted by Durango_boy
Make it a VERY thick piece and it will function right and not just look good and clean. You'd be VERY suprised how much air goes over your radiator instead of through it at high speeds.
Melting Slicks
Joined: Oct 2004
Posts: 2,662
Likes: 8
From: Knoxville Tennessee
As I played with my cooling system a couple years ago I tried electric fans without the shroud, with the shroud, with and without seals. I had to have a shroud and the seals in place before I got the results I wanted. Even with the electric fans pulling air thru the rad, without the seals in place, a lot of air would still go around the rad; and these cars need all the air available forced thru the rad. Just my experience.
Bernie
Bernie
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
When I changed my rad a few years ago I couldn't get the shroud to fit properly and started running without. Not only that, the core support seal above was never on the car when I got it, and it still ran under 200 unless I was really driving hard. I found out that whole time, the clutch was bad too. I didn't know that it spinning after the engine was shut off was a bad thing, and it's done that since I got it too.
