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what is a proper cooling fan set up

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I took my stock fan out and used the shroud to put in my summit fan. I say it has twice the ccf without looking. Less amps and more air was the reason i got it.

The stock shroud covers 7/8 of the radiator.

Do i need to fill that gap that the shroud does not cover? The top is good and the bottom. Just the pass side is visible.

The fan is about 4 inches from touching the radiator. It does slightly pull air from the engine bay on the gap side.

So does a shroud need to create a vacuum with the fan or is the fan strong enough that a little slop wont matter?
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Discussion Starter · #3 ·
do you have ac? They tried to say that at idle the gap is not enough for ac.

I will close the gap, sadly its 90 out. Why do things go wrong when its 90 out and not 70 :)
 

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Discussion Starter · #7 ·
Bob Lincoln said:
I think he meant that the airflow was the right direction, but that if the shroud isn't tight against the radiator, some air at the edges is pulled in from the 'engine side' of the radiator instead of flowing through the radiator fins; and that this air is a little hotter. But that effect is really marginal.
yes that. same thing when you put your fan in the window of your house. some air is from outside some air is from the inside that goes through because the fan is not sealed to the window.
I pretty much cut out the stock fan and put the summit fan in its place. Nothing really changed.
I rigged some aluminum on the open side to seal it up. Now the only air comes from the front.
 
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