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On 14 Nov 2005 at 17:25, Russ Wolfe wrote: > Mahle is actually making valves with hollow stems and stamped from > metal. They are in the testing stages right now. They have engines that > have gone over 100K miles with them. Probably be in production in a > couple years. The lighter the valve, they higher the rpms for the > engine. Could these be sodium filled? One of they guys I work with has drilled out motorcycle valves, added a bit of sodium, and welded the hole shut. The hole is in the head end; the stem end is hardened. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~