Hi BillA,
We have been talking about the flow advantage to be found in the use of a heater core that is single pass vs two pass in cores of the same size, total numbers of tubes ect.
Cores 2-342 & 2-199 in this case. Both are 9.5" X 6.125" X 2" but the 2-342 has the inlet on one end and the outlet diagonally across at the other end. While 2-199 is the more often seen dual pass core with the inlet & outlet at the same end.
In a cooling loop if you alternated using the above two rads with the rest of the loop remaining the same the single pass 2-342 should give a higher system flow due to the lower head loss with the single pass rad. But at the same time the flow increase gained in the use of the single pass rad would in part be lost to the resulting higher velocity in the system lines. But also the loss to increased velocity could be minimized by care taken in locating the single pass rad in the loop so as to shorten the total length of lines.
So the idea we were disscussing was if we purchased and shipped to you the two rads in question, would you be interested in running them in your testing rig to find the amount of gain?
I guess what it amounts to in a way is a extension of phaestus's work on improving the flow of a system by care in choice in fittings and this would be care in choice of rads. A way of optimizing a higher flowing system without high cost when setting one up. And without a super pump.
Interested?
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