Thread: How to calculate radiator size?

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Eric, if there is a calculation, it is beyond me. I usually just leave that up to the manufacturer of the radiator and go with their recommendations.

I would strongly suggest you buy a radiator from one of the major hot rod cooling companies, like Walker, The Brassworks, PRC, or similar. They all have radiators specifically made to fit in a model a or whatever shell, and also have the inlets and outlets in the appropriate places for whatever engine you are running. It makes it so much easier and the end result is a rod that doesn't boil over in July, sitting at a red light.

We have started using PRC and love their products. The welding and workmanship are really impressive, and the price is very good. We also recently bought a Walker for my one Sons T, and it is also a nice product.

Here are a couple of pictures of my other Sons '29 shell, like you have, and this radiator was built to cool his 455 Olds for here in Florida. BTW. their website is: www.prchotrod.com/

Don