Phil, Valves commonly have a 45 degree face, which seats against a like angle in the combustion chamber / port. Back-cutting the valve means that a 30 degree face is added, tanget to the existing 45 degree face, but not cutting into the 45 degree face. The 30 degree face should be approximately the same length as the 45 degree face or .100 - .125 inch. This "back-cut" gets it's name from the fact that the new face or cut is on the back face of the valve.
phil brookman <p...@ntlworld.com> wrote: not too sure what you mean by back cutting the valves can you explain p Scott Cable Jamestown, ND s2cab...@yahoo.com --------------------------------- Yahoo! Mail Stay connected, organized, and protected. Take the tour
