All the rumors were put to rest at the recently completed SEMA Show when TFS pulled the cover off of its Two-Valve cylinder heads. It has been long rumored that they had been working on new castings and they finally admitted it. Al Noe walked us through the new castings at the show and the heads show some great improvements over the stock units. TFS is the company to build a completely new casting for the most popular modular motor. They should be available by Spring 2009.
The company's primary goal was to take a Stage 3, CNC-ported OEM head and build a cast version that was superior in port flow, chamber design, and address many concerns with the factory castings. According to Noe, the mission was accomplished and they incorporated several unique features that have a lot of mod motor enthusiasts smiling. The first thing Noe pointed out was the valve placement. In order for better valves and more efficient port designs, the valves needed to be moved around. The exhaust valve has been flipped to the other side of the camshaft; those who are familiar with Two-Valve heads will recognize this modification. The exhaust valve now sits where the exhaust lash adjuster was placed. By moving the exhaust valve, it allows a larger camshaft to be used in stock short-block applications. We were told that cams up to 0.600 lift can now be utilized! Be sure to note, PI-style cams are required.
The combustion chambers are available in two sizes, 38cc and 44cc. Flow is rumored to be in the 240 cfm range, on a legit mod motor bore too, not a 4.030-inch bore size like some companies use to bump up their results. The cam caps are made from billet and bolt-on to the heads. That means if you damage one of them, the head can be salvaged and a new set of caps can be installed. If that happened on an OEM head, you would have to junk it and that will cost you more money to get a new one. We also dig the fact that TFS drilled and tapped provisions for both Romeo and Windsor style valve covers. That way you don't have to worry about which head to order.
These heads have been flogged for over 6,000 miles on a test mule as well as countless dyno testing. These tests were conducted on final products, not engineering one-off pieces. Final pricing has not been announced, but stay glued to the Blogs section of MM&FF's website for the latest information.