Quote:
Originally Posted by gqshortynt
My thinking, and feel free to correct me if im wrong. But after reading through leethal's post i can agree. These bigger radiators with more cores, or thicker radiators seem to have a higher density of fins. Therefore as you go thicker you require more air pressure, and a bigger fan to equalize the cooling affect. More cores = more heat but more heat and more fins for the additional cores required more airflow to dissipate that heat. My current radiator is 3 core and 56mm.. So therefore going for a thinner less dense radiator, yes it cools a lower volume of coolant at any given time but its going so more efficiently.
Also on another note exactly how far have people gone sealing around the radiators including in the grill? Im thinking of putting some foam or something similar in between the front panel and the grill either side of the radiator/condensor like whats found in modern vehicles to help channel air. anyone done this? I would love to see some photos or ideas. Cheers!
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In the first part you are correct, it take more air pressure to pass through a 3 core compared to a 2 core radiator. So you do need to make sure that you have a good flow of air. This means the radiators rubbers are in place and you have no massive obstructions in front of the grill.
The benefits of a 3 core radiator are more surface area (more tubes for the water to pass through), but this is only good if you have the air passing through the radiator and not spilling out from around the radiator because the rubbers have been removed or the air been pushed aside because of those Big Bull lights commonly fitted to 4X4.
As part of my testing I used a Anemometer to find out where I was losing air from the front of my Troll. Fitted a fixed fan set RPM at 1500 and measured at all points of the front of Grill.
Found without the rubbers on top as shown in pics from before more air was been drawn through those gaps than through the front of radiator, this may sound good but it's "not" when the bonnet is closed this is covered air is drawn in from the engine bay when stopped and air is spilled out through these gaps when moving. Air like water will flow in the direction of least resistance.
Measured without rubbers 3.2 m/s with rubbers in place 4.2 m/s a fair drop in air speed, and for ****s and giggles I took off the shroud 2.5 m/s a shroud is there for a purpose cooling 101
https://www.flex-a-lite.com/blog/the...roud-position/
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