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Originally Posted by 8-Ball
Not without completely desoldering the rad and taking it apart, at which point, you may as well just make your own.
As I understand it, they don't really perform any better than a heater core. I "believe" their goal was to get the most out of a design which can cope with the high pressures of automotive oil cooling.
8-ball
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I would have to dis-agree 8-ball. Works just the same as a water block. Same principles apply. The rads we use are of poor performance and not efficient at all. There will be laminar flow through those tubes which results in the bulk of the water to never see contact with the copper walls to transfer heat. The water that actually does contact the walls will transfer its heat and then pick up heat from the surrounding water. Then to pass through the loop once again to pick up heat in the water block never to be cooled efficiently. Introduce the turbulators and there will be more water in contact with the copper walls. Increase in heat transfer with the expense of some restriction but not enough to be concerned about. The performance gain will out weigh the restriction. The temperature at which equilibrium will occur will be lower. A rad with a lower C/W will aways perform better.
It's all about getting more water molecules to be in contact with the copper walls before that water leaves the rad. More flow helps but more flow alone isn't going to help much when you have laminar flow within a rad.