[Gooserider]

AA- BillA's testing was limited, and he only did heat dissipation on a few rads, my understanding was that he felt the results would be similar for other rads of the same general design - IOW, the chevette #'s would be good for any automotive HC design.

The big advantage of a single pass core like the 2-342 is that it has approx 1/4 the flow resistance (head pressure drop) that a similarly sized double pass core has. This makes sense if you think about it. In an SP core, all the tubes flow in parallel for just the length of the rad, while a DP core uses just 1/2 the tubes to flow each way. Thus the SP core in effect has twice the effective tube cross section, and 1/2 the length of the DP core, plus it gets rid of the two transitions from the far end tank of a DP core. Bottom line is that an SP core will give more flow volume in any given setup than a DP core, and give more pressure drop across the WB's where it will do the most good.

I once went through the FedCo catalog from LeakyCar.com, and it appears that there are only about 23 SP rads in the book, so the selection is small. There are a few odd sizes, but about 1/2 are approx the size of the 2-342, and it is the only one with the I/O's on the face, the others have the I/O's coming out either the ends or the sides of the tanks which would make them more awkward to mount for most apps.

Gooserider