Posted by Art H on January 17, 2002 at 23:48:07:
In Reply to: Valve port blisters. posted by Matt Walters on January 17, 2002 at 17:10:00:
Thank you for giving a name to those things. I always wondered why purists ranted and raved about the evils of short-action valves (constricting the air flow) yet ignored the bumps inside conventional pistons, but I never knew what to call them.