The 2511 muffler is especially tough steel, I think I actually used a lil punch & hammer to make a dimple and then use a step-bit for the hole, clean up with a grinder....cannot say that made it look better but it would just be a pain trying to push increasingly-larger bits through that thing! A real drill-press would make short&precise work of it!! Otherwise make sure it's clamped/secured tight and use wd40 to keep the bit from overheating!
As usual, any&all *constructive* criticism is sought, am still trying to seek who's making the hottest/strongest 2511t's to see how they're approaching things, obviously exhaust is the low-hanging-fruit but the entire induction stream up to the carb's bore seems ripe for modification, a close 2nd to the exhaust system IMO.
What size bit did you use to drill the muffler out with?
The 2511 muffler is especially tough steel, I think I actually used a lil punch & hammer to make a dimple and then use a step-bit for the hole, clean up with a grinder....cannot say that made it look better but it would just be a pain trying to push increasingly-larger bits through that thing! A real drill-press would make short&precise work of it!! Otherwise make sure it's clamped/secured tight and use wd40 to keep the bit from overheating!
As usual, any&all *constructive* criticism is sought, am still trying to seek who's making the hottest/strongest 2511t's to see how they're approaching things, obviously exhaust is the low-hanging-fruit but the entire induction stream up to the carb's bore seems ripe for modification, a close 2nd to the exhaust system IMO.