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text table of all VHRC recommended fitters is available.

4 Inch Cores

Our 4 inch VHRC core, comapred with its thinner cousins, side view. Our 4 inch VHRC core, comapred with its thinner cousins, side view. Click for a larger image.

Finally, a true 4 inch honeycomb core, now made in Australia by Vintage Honeycomb Radiator Company.

Top down view comparing our new 4 inch VHRC core, with some thinner varieties. Top down view comparing our new 4 inch VHRC core, with some thinner varieties. Click for a larger image.

Up until now, if you lived in the Southern Hemisphere and wanted a 4 inch honeycomb core, you either bought it from the Northern Hemisphere or put up with the “other” way out: double stack 2 x 2 inch cores beside each other!

Face of the 4 inch core showing its lockseams. Face of the 4 inch core showing its lockseams. Click for a larger image.

This is something I have always refused to do because a honeycomb core has a ¼ inch soldered face on each side that does no work. So the working area is always ½ inch less than the total thickness of the core. If you double stack cores to make 4 inches, that just means even more dead weight. You will get only 3 inches of working core, as opposed to 3½ inches from a monolithic 4 inch core.

4 inch core, cut to show inside, side view. 4 inch core, cut to show inside, side view. Click for a larger image.

I had a customer call me from Western Australia wanting a 4 inch core for a 1931 V16 Cadillac. He bought this core from the US in the past, suspecting it actually came from the UK. On testing the cores they found it so badly blocked with solder that it was never fitted.

Large 4 inch Cadilac core dwarfing its Austin 7 cousin. Large 4 inch Cadilac core dwarfing its Austin 7 cousin. Click for a larger image.

I agreed to have my 3½ die set split down the middle to allow for the manufacture of 3½ or 4 inch cores using removable sections. After some testing and modifications the Cadillac is now complete and on its way back to Western Australia.

2 and 4 inch copper lying side by side. 2 and 4 inch copper lying side by side. Click for a larger image.

The first job was to have a slitting gauge made to allow us to slit the 4 inch copper from the 12 inch master roll. This happened and the rest is history. See the slitting machine page.

Wire fasteners. Wire fasteners. Click for a larger image.

I have included photos of the cores from start to finish here.

Diagonal wires in place. Diagonal wires in place. Click for a larger image.
Cut 4 inch core showing its water galleries. Cut 4 inch core showing its water galleries. Click for a larger image.
4 inch core, cut to show inside, top-down view. 4 inch core, cut to show inside, top-down view. Click for a larger image.
Cadilac, Austin 7 and Chevrolet cores after dipping. Cadilac, Austin 7 and Chevrolet cores after dipping. Click for a larger image.

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