The Cal-look Lounge

Hello

First of all I would like to thank everyone for this great forum.

I wonder if someone already tried this:

Everyone with experience with high performance aircooled VW's, have had concerns about high head temperatures - right? And most of us have also had a type 4 head in our hands, and wished the type 1 head had similar large cooling surface. But it doesn't.
Then I started to think about disc brakes, and what is normally done in order to improve cooling. By adding holes in the disc, it is possible to improve heat transfer, if it is done properly. This could in theory be transferred the aircooled cylinder head.

For example:

The cooling rib of the type 1 head is approx 2.5 mm thick. If a 2 mm hole is added in a rib, then you have removed a surface area of pi/4*2^2*2 = 6.3 mm^2, from the sides of the rib. But you have gained a cylindrical suface of pi*2*2.5 = 15.7 mm^2. So in total, you have increased the surface area by 15.7 - 6.3 ^= 9.4 mm^2. Lets say 20 small holes is added per cylinder, and the head has 8 ribs per cylinder, then a total of 1500 mm^2 is gained, or 15 cm^2.

I am thinking of adding this to my heads for my 2085 cc engine, but I would like to know if anyone have tried this before?

Best regards

Peter

Don't forget to account for the drop in mass of the head.