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Less than 90 degrees to airflow reduces efficiency, Turning vanes as found in large air handlers in buildings are required.

When building cars I went to the NAPA store nearby and looked in their picture books for any shape you might have in mind. Then they can look up that picture by part number. I used GM evaps for oil coolers with dash AN-12 male fittings. Submerge all but the top few fins in water and weld away. No fear of damage. Junk yards usually pile them up for scrap from older cars. Ideal for us. U-pick it yards are good because you can check if pressure is still in the system. Probably a good unit.

Never mention "AIR PLANE" when buying things.

Lynn E. Hanover

In a message dated 9/6/2019 11:26:39 AM Eastern Standard Time, flyrotary@lancaironline.net writes:

Finn asks-

"BTW, what happens when you lay down (at a 20 degree) angle a radiator that is designed to be upright?"

I always wondered about that myself. The stock FD (3rd gen) radiator has to be at about a 45 degree angle (?) to the incoming airstream. And it has 2 "supplemental" staged electric fans (no pump fan), one is always on if the AC is on, the fans have different blades and different speeds controlled by ECU and temp sensor. I suppose the fins are canted or perhaps they are best tilted to airflow to create turbulence and help remove some heat..........don't know much about radiator design............

MW

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