Just how rare are these Flatty heads?

There seems to be some of the 21 stud ones around but no 24 stud ones?i understand they were only built for use on 37-38 model 85.Thanks for any info.

 

Their rare or no one ever sells them or runs them .......... iv only seen photos of them ever.

 

Pretty Rare heads. I believe that the Bob McGee roadster ran a set. They look pretty cool all polished. Please note lack of water outlets. They utilized Thermosiphioning similar to the Model T. Thermosiphon (alt. thermosyphon) refers to a method of p***ive heat exchange based on natural convection, which circulates liquid without the necessity of a mechanical pump.

Geoffrey

 

They are high dollar even if nobody would use them. That's the way it is with flathead stuff.

 

The only time I ever heard of them was from my father. He ran a pair of them on a '39 Ford he had back when. Or at least I think that is the car he had them on. I know he had a pair.

 

Huh? There still has to be an outlet for thermosyphon to work. The hot water rises to the top and enters the radiator.
Are you sure those, somewhat, larger holes aren't the outlets?

 

I would think with Thermo Flow being stamped on the head you are right about no water pumps. Those center holes are evidently for the outlets.

Don

 

they do have seperate center outlet water manifolds that attach to the top of the heads.(unfortunately i did not get a set with the heads!)Here is a picture of them.The only difference from these and stock heads is they have no water p***ages in them.They used the stock water pumps

 

They are made of bronze or copper and have no water p***ages. The heads themselves are air cooled. When you install them the stock water pump, radiator etc. stay in place. The cooling water from the block goes directly out of the holes at the top of the block, into the rad, without cooling the head.

The material of the head absorbs the heat and disperses it into the air.

I don't know what good they were supposed to do. Maybe they didn't do anything and that is why they never caught on.

 

How rare is the block that they fit?

 

I ***ume you can use them as a direct replacement for the stock heads.i found a pic of the McGee 32 roadster that ran 21 stud ones.i can not find much on the 24 stud ones?

 

UGH! My favorite heads EVER

 

Could they have been for an industrial application rather than automotive?

-KK

 

No;they were only produced for automotive and marine ford engines in 37-38.The marine ones had different water manifolds. Chris