The tempest will give the most speed but with the rings out, the exhaust cuts the bow lift and it blows out so much it almost puts you back in the water. I took mine and had it cupped. That made all the difference, it corners without the bow dropping, same top end, and good ruff water ride. 82.7 with a 25 pitch. (1.62 gears, 250XS on a Cougar)