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ursus · 09-10-2013, 02:49 PM

At one time I had three of the F3 heads that had been removed from Model-B engines that were used in industrial applications. The engines were all late 1930's Diamond blocks that magnafluxed out with so many cracks that I scrapped them. The F3 heads were all sound, well made, and crack free. The compression chambers looked exactly like that of the C heads and when I CC'd each of them they were identical to the 4.6 to 1 compression of a C head.

09-10-2013, 02:49 PM	#8
ursus Senior Member Join Date: May 2010 Location: Oregon Posts: 1,375	Re: The F3 Head At one time I had three of the F3 heads that had been removed from Model-B engines that were used in industrial applications. The engines were all late 1930's Diamond blocks that magnafluxed out with so many cracks that I scrapped them. The F3 heads were all sound, well made, and crack free. The compression chambers looked exactly like that of the C heads and when I CC'd each of them they were identical to the 4.6 to 1 compression of a C head.