I've been snowboarding for about 11 years (average 2 times a week during the season) and I have recently started doing boardercross. The courses seem really icy and its hard for me to hold an edge through the turns. I am really strong at the start and through rollers but once the turns start coming i start to lose speed even when i feel like I am making a good turn. I havnt really tuned my board in like a year but I dont really think that is responsible for the 4 second delay i have on some people down a 40 second course. I am a really advanced boarder but carrying my speed through turns and keeping my edge seems impossible.
Proper form, sharp edges, correct bevel, long effective edge, stiff board and wax; you'll want to make sure you have these. Yes, losing speed in turns while not that much each time will add up over the course. Lost momentum can never be regained and will cause all subsequent actions to happen slower than they would have, if the momentum had been maintained.
Sorry but if you don't think tuning your board is important for competitive racing, then you should give up now. Complaining about loosing on an icy course when you haven't touched your edges in a year!!! haha cmon is this a troll job?
Edges and wax, racing 101.
Wont even start talking about BX techniques, since you failed the 101 course so miserably.