As Kyle explained already, that was a hard question to answer. It could go either way. Sounds like in Kyle's area, open C tends to be a faster class. In our area, production C tends to be a faster class. At the nationals that I went to, it looked like production C was the faster guys. So I would say, if possible, watch both races first and see which guys are slower. If that isn't possible, sign up for one and find out. If you ended up last, you're last. Not the end of the world either way. I'm last often! LOL