I just installed the dyno jet kit, mbrp pipe, and k&n filter. I used the 148 and set the needle on the second notch. Upon running it, there was a big hesitation in the low end, but then it ran smoothly through the rest of the throttle. I am located in Minnesota, approximately 1500 ft. I gave up on it for the night, any suggestions on what I should adjust, so that I don't have to try every thing? thanx. Caz