I don't know why you guys say they are too slow for the street?---I mean, if we are driving it like a porsche weaving in and out of those orange cones then yes they are too slow, but we are not. Even on a worse case senario and an emergency change mine is fast enough. I will say they are too slow for the fast desert running, like around 65 and consistantly turning left and right but it's just something you have to plan ahead about.
Back to the ? at hand---The reason it feels slower is because of the ram and your only upgrades are to bore out the output on the pump (I can't remember the size but its on WTO website) and stretch the spring. Real simple and easy to do. If you still feel it is too slow you need to think about a smaller ram. Rule of thumb--The smaller the ram the less turning power it has but the faster it turns--The bigger the ram the more turning power but the slower it turns. when I get stuck between a rock and a hard place the rock will move when I turn the wheel.