It is a 3 core aluminum radiator I bought on Amazon years ago. Sitting on the back side is a Spal puller fan (adjustable---thermostatically controlled) and this mounts onto a thick aluminum shroud I bought from Old Air Products. It has 4 corner vents and rubber flaps that drop down when air flow is light. Then the A/C condenser sits in front of the radiator and in front of it is another (smaller) Spal fan which is wired to automatically go on any time the compressor is engaged. The fact the radiator is 3 cores and has smaller gaps between the fins than the original by apx 40% means it needs some help with airflow to make it as efficient as possible...the old (original) radiator/fin design had plenty of airflow, however the fact air passed through faster meant it gave up less heat in the process. Especially in slow moving traffic. That is where you notice the benefit of an engineered fan greatly. And there is with the A/C extra heat being generated. Sort of the same thing as your home central A/C unit and the fin design it uses. The condenser and compressor outside today usually use 3 bladed (some 4) fans which are larger in diameter, spin faster and suck a larger volume of air through fins which are larger but closer together than the old style which you could see through. They do this to maximize the SEER. Most of them use fins which wrap around the refrigerant tubes in a circular fashion so more heat can be thrown off faster. If you go out there in the dead of summer, when the compressor is running you will feel a good amount of heat being thrown off out the top (or side if you happen to have a horizontally oriented system)...all a part of the effort to make it run less frequently.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end