Posted by Frederick J. Young on April 11, 2002 at 16:42:08:
In Reply to: Question about modifying rotary valves posted by Dave on April 09, 2002 at 14:33:34:
Inertia is what makes large valves slow. Most of the inertia comes from the outer diameter of the valve and hence drilling them out won't help much. I would suggest getting some carbon fiber valves from Finke Co.