Comparing the exact same size to size the copper and brass will cool better I've had issue with aluminum radaitors cooling good for the first year and then run hotter the next year with no changes I had to have that radaitor back flush every year to keep the motor running under 200 F
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
I've had issue with aluminum radaitors cooling good for the first year and then run hotter the next year with no changes 
I had to have that radaitor back flush every year to keep the motor running under 200 F 
