![]() As it turns out, the 25-row Series 6 will have about half the pressure drop of the 20-row Series 9, and the 50-row Series 1 will have roughly 1/10th the pressure drop of the Series 9! All three of these coolers have an effective cooling area right around 75 square inches, so their cooling performance is similar.īut the Series 9 will have the most flow restriction (longest rows x fewest rows), and the Series 1 will have the least restriction (shortest rows x most rows). The chart suggests at least three possibilities: Series 9 with 20 rows, Series 6 with 25 rows, or Series 1 with 50 rows. Say we have a high-performance engine putting out about 325 HP. Let's take an example from the Setrab application chart and do just a little math. Even better, adding more rows simultaneously improves flow even further. Fortunately, the last point in the list above suggests a good workaround: We can choose a shorter cooler to regain some of the lost flow, and simply add more rows to regain some of the lost cooling. Longer plates cool better (good), but at the expense of flow (bad). In the list above, the only apparent conflict we have to wrestle with is in plate length. Two coolers with similar cooling area will have similar cooling performance.There is a direct relationship between the number of plates and cooling effect. ![]()
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