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t-head · 06-13-2010, 11:44 AM

These illustrations show Roofs third model of head that he evidently called the eight valve, without giving it a letter model like the earlier 16-valve heads. I think at a later point it was called the Liberty Head.

It is a more conventional head that appears to be very similar in design to the early Fronty Model T, S & R heads. It has two intake ports on the left hand side and three exhausts on the right along with its very distinctive valve cover.

He also made what he called the Super Racing 8-valve model with what is called extreme high compression. It came with bigger 1 7/8" valves along with larger ports and a high speed camshaft. It was $135 complete with manifolds a single 1 3/4" carb and the camshaft. For $160 it was available with two 1 1/2" side draft carbs.

The forth photo shows a Liberty Head in Bill Smiths wonderful Museum.

06-13-2010, 11:44 AM	#81
t-head Senior Member Join Date: Jun 2010 Location: In my machine shop. Posts: 1,047	Re: Model T Racing Thread These illustrations show Roofs third model of head that he evidently called the eight valve, without giving it a letter model like the earlier 16-valve heads. I think at a later point it was called the Liberty Head. It is a more conventional head that appears to be very similar in design to the early Fronty Model T, S & R heads. It has two intake ports on the left hand side and three exhausts on the right along with its very distinctive valve cover. He also made what he called the Super Racing 8-valve model with what is called extreme high compression. It came with bigger 1 7/8" valves along with larger ports and a high speed camshaft. It was $135 complete with manifolds a single 1 3/4" carb and the camshaft. For $160 it was available with two 1 1/2" side draft carbs. The forth photo shows a Liberty Head in Bill Smiths wonderful Museum. Last edited by t-head; 06-12-2011 at 11:03 AM.