JoeMac - What heater cores and oil coolers have you compared (ie. size/design/mfg/etc)?
Rotor - Is yours a 16 plate design? I suppose, by simple extrapolation from Big Momma's results, that a 9" heater core might surpass the Serck and other similar oil coolers in raw heat transfer capacity at a given rate of flow; however, the significantly lower head loss of an oil cooler may result in a net system improvement over the heater core. Or perhaps I'm putting too much faith in flow...
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