The higher fps you have the farther you fly when surfing. 100 is fine for most maps though people often go up to 131. Keep in mind anything higher than 100 can cause you to 'glitch', which is when u freeze on a ramp suddenly so you may not want to use it sometimes.
Type
cl_showfps 1 in console to see your fps (
cl_showfps 0 to turn it off)
Also after you turn of vertical sync type all these in console:
fps_modem 0 (if this is set to, say for instance: 60, it sticks my fps at 60)
fps_max 131 (this is generally considered by most as the maximum fps-to-glitch-risk-ratio to use)
developer 1 (this allows your fps to go above 100)
now if you type
developer 0 your max fps will be 99, and all u have to do to get 131 would be to type
developer 1 again
So now if u bind a key or mouse button to cycle between
developer 1 and
developer 0 you can instantly change your fps from 99 to 131 back and forth