Pictures are worth a 1,000 words. A large 2 row is more efficient than a 3 or 4 row radiator. It's counter intuitive.
Some light reading starting at post #2
http://www.pirate4x4.com/forum/gener...rass-tech.html
I'm personally using an Engineering Cooling Products 2row here in HOT West Texas and after 12k miles and 3 summers it absolutely does the job. Personally tested behind my ZZ4 in 110 degree weather traveling 75mph with the A/C blasting. Good stuff.
