I have it on good authority that an aluminum radiator is a bit inferior to a standard Morgan Radiator when it come to heat transfer. However; the Alloy radiator is quite a lot lighter and because it is welded rather than soldered is more robust than a standard Morgan Radiator. Plus if built by a very good craftsman (Peter Mulberry) gives very good service. I am using a +8 Morgan Radiator (second owner) given to Me by a friend in Denver that purchased an alloy radiator. This radiator has been faultless. I also purchased a Replica Morgan Radiator which is a copy of a '60's radiator only with upgraded materials and craftsmanship. Also over 50,000 miles and faultless. Not sure where the DHC (,61) radiator came from but with less miles seems OK. Looks to Me it comes down to CRAFTSMANSHIP!
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Seattle
Ah yes......but what Morgan radiator are you referring to? You cannot compare the older radiators to those of more current cars. The Williams alloy radiator which I had fitted to my 3 litre Morgan last year works well in all temperatures. The fan still comes on in heavy traffic in stop start motoring but then this is to be expected with little airflow through the core. I think that there is little to choose between the radiators from Williams or Mulfab, they differ a little in construction and mounting but both are superior to the standard radiator.
