Oh I love the way these things work! I just feel like there might be an issue and I'm not sure what. Maybe without a muffler it's not liking minimal back pressure or something. It's weird, but man will she open up and scream!I hear these electronic pedals "learn" your style or at the very least are like those electronic stereo dials, its not how fast you turn the nob but how long....
BTW I love the hearing the VTEC kick over with the louder exhaust V8/KN similar to yours! I grew up in late 80s early 90s hondas when this was "new" technology, I love it in V8 form