Are some of Lionel's RS chipsets better coded for 4 chuffs per revolution than others?
Specifically, I have a RS 4 generic steam board, that I replaced the sound chip with an "Atlantic" chip that I got from TAS many years ago. It is in a Lionel E6 Atlantic that came factory equipped with a mechanical smoke unit and on chuff per revolution.
When I upgraded the loco to a fan driven smoke unit and 4 chuffs per revolution (GRJ's Chuff Generator & Super Chuffer - very cool), it sounds great at slow speed. After about a scale 25 mph, it tops out at chuff speed, and sounds like beating a steel garbage can.
Is replacing the RS 4 with a RS 5 board an option to improve this? (Or anything else?)
Thanks.