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Old 05-25-2008, 08:31 PM
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Fan Spacer

In my continuous quest to cool my - 60 over- Chevy 350 in my 50 Ford I have concluded I need to move my fan closer to the radiator. Its steel bladed mechanical and about 3.5" away. Will a 2" spacer cause any harm? Such as belt alignment putting too much strain on the water pump bearings? I know I need a shroud too. I have a 14" flex fan
I may run as a pusher--if it comes to it. It cools ok even in our Tx heat going down the road-- but heats up quick in stop and go traffic.
The engine has about 1000 miles and I switched to Mobil 1.
Will the synthetic help any in the temp buildup?

OPINIONS ARE LIKE ....everybody has one.

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Old 05-25-2008, 08:36 PM
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You don't need to move the fan. You just need to build a shroud that will include half the depth of the blades. To answer the other part of your question, you can run the blades pretty close to the core, depending on how much the blades grow at rpm. I have run them at 1".
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Old 05-25-2008, 08:39 PM
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Quote:
Originally Posted by techinspector1
You don't need to move the fan. You just need to build a shroud that will include half the depth of the blades. To answer the other part of your question, you can run the blades pretty close to the core. I have run them at 1".

Yep, what he said! LOL Shroud is the #1 thing to have on the radiator.
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Old 05-25-2008, 08:40 PM
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Here's an article from the wiki that may help.....
http://www.crankshaftcoalition.com/w...cooling_system
Pay particular attention to using a steel OEM 7 blade 18" fan with thermostatically controlled fan clutch. In my opinion, your 14" flex fan is dog doo.
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Old 05-25-2008, 09:49 PM
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I like to run a 16 or 17 inch mechanical fan ... at the least.



Both Summit and Speedway carry a good steel fan like above for around 25 dollars.

Question ...
Are you using the SBC short pump or the SBC long pump ?
If you have the short pump .. the long pump will move the fan closer.


This photo below is of a short SBC wayer pump



This one below is a long style SBC water pump



Look at this photo ... if you can put your finger in between the pump and the timing chain cover ... it is a long style

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Old 05-25-2008, 10:00 PM
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Correct me if I'm wrong, but swapping from a SWP to a LWP requires different brackets and pulleys ... doesn't it?

I believe that it also places the alternator on the opposite side of the engine ... right?

Just a couple of things to ponder if you decide to go that route.
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