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Aluminum Radiators
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<blockquote data-quote="Comet" data-source="post: 801543" data-attributes="member: 15944"><p>Well, I missed out on all the drama, but I gotta side with Jason and the alum. rad. The reason is that alum. rad. does in fact cool better. Even brass rad. manufacturers aknowledge that. Studies have proved it, there is really no point arguing the cooling differences. There may be other reasons to not use alum. rad. on a trail rig, but cooling is definetly not one of them. </p><p>The reason is the cooling tubes inside the rad. Copper radiators typically uses 3/8" dia. tubes while the aluminum radiators use 1" tubes . Wider tubes mean more contact area with the fins. Wider tubes require the tubing wall thickness to be increased to prevent the tube from over expanding and ultimately bursting. </p><p>In a brass rad. wide tubes are not practical because the radiators would weigh too much. Aluminum can be designed with a heavier wall thickness with very little effect on weight. Brass rads. overcome smaller tube sizes by adding more cores. But a 4 row core has very little use on a trail rig going 2-3 mph all day. By the time the air hits the 4th row, it is very hot and not doing much to cool the fins, which in turn cool the tubes, which is what making efficient rads. is all about.</p><p>NASCAR and trail rigs are very different, and they do not use alum. just to save weight. Going 200mph for hours on end is very hard on an engine and heat build up can ruin a motor, even at those speeds. As a result, they use what works best to cool a motor-alum. rads.</p><p>I run a Howe rad. and love it. Stays cool all day and after trying everything else to cool my motor down, switching to an alum. rad. was the one thing that helped it get down to where I wanted it consistently. Look for welded rads., not epoxied. Carry JB Weld for trail fixes.</p></blockquote><p></p>
[QUOTE="Comet, post: 801543, member: 15944"] Well, I missed out on all the drama, but I gotta side with Jason and the alum. rad. The reason is that alum. rad. does in fact cool better. Even brass rad. manufacturers aknowledge that. Studies have proved it, there is really no point arguing the cooling differences. There may be other reasons to not use alum. rad. on a trail rig, but cooling is definetly not one of them. The reason is the cooling tubes inside the rad. Copper radiators typically uses 3/8” dia. tubes while the aluminum radiators use 1” tubes . Wider tubes mean more contact area with the fins. Wider tubes require the tubing wall thickness to be increased to prevent the tube from over expanding and ultimately bursting. In a brass rad. wide tubes are not practical because the radiators would weigh too much. Aluminum can be designed with a heavier wall thickness with very little effect on weight. Brass rads. overcome smaller tube sizes by adding more cores. But a 4 row core has very little use on a trail rig going 2-3 mph all day. By the time the air hits the 4th row, it is very hot and not doing much to cool the fins, which in turn cool the tubes, which is what making efficient rads. is all about. NASCAR and trail rigs are very different, and they do not use alum. just to save weight. Going 200mph for hours on end is very hard on an engine and heat build up can ruin a motor, even at those speeds. As a result, they use what works best to cool a motor-alum. rads. I run a Howe rad. and love it. Stays cool all day and after trying everything else to cool my motor down, switching to an alum. rad. was the one thing that helped it get down to where I wanted it consistently. Look for welded rads., not epoxied. Carry JB Weld for trail fixes. [/QUOTE]
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