I'm hoping my equally obsessed snowboarding comrades can help me fix this issue. For some reason when I start high speed carve on my heel side, my board begins to bounce and skid and I just slide out (with my as on the ground). Is it my board, the snow, or do I just suck at carving. BTW I never have any issues on toe side.
I had this issue early this year. Got onto a new board that let me REALLY carve hard on my toe side, but I was getting chatter and washing out on my heelside. Here's what worked for me.
1) First and foremost, I had to really exaggerate bending my knees. If you think you've bent them enough, bend them more. I can't stress enough how having your knees as close to 90 degrees as you can get will reduce the chatter. In reality you'll probably get the inside angle to about 120 degrees or so which is great, much better than the nearly straight legs most people ride at!
2) Slow down. I dialed it back just a bit to a still quick pace, dialed everything in without chatter, and then upped the pace again.
3) Keep the weight over the front, you'll naturally move towards the back anyway near the end of the turn, so just focus on putting a lot of pressure on your front leg to really set the edge for the turn.
If you can have somebody tape you or take pics, just looking at them yourself can even help correct a lot!
Sorry to keep posting this pic but here the inside angle is probably about 135 deg or so, and this was after I started working on correcting the chatter. Bend those knees!