Yeah I can see where u are going with that Scott...sitts with me.
The lead solder joint used on copper-brass radiators reduces the efficiency of the heat transfer, whereas alum tubes and fins are welded, so you have the same material properties.
That doesnt..the area invoved in solder joints are not cooling areas on eith brass or Al radiators.
but alu rads are more thermally efficient at heat transfer than copper/brass types
Thats what the marketing propganda from so called independant studies show...which in most cases is marketing propagada BS...And that copper /bras have afar higher heat co efficient than Al, and with thinner walled brass cores eficiency far greater,
And to that black makes a huge effect to heat transfer (chrome for show, black for track)
I do know modern cars use Al cores because of cost, and if one makes a brass/copper core identical as possible it would be smaller....that is the amount of difference in the price between copper and Al....manucture process of Al radiators is also far cheaper.
The marketting guys once again telling porkies
For the little amount of money a thermostat costs, put the 160 in and see what happens.
Why? did you read my explantion reasons not to above, and if so what is wrong with that logic?