How fast can you pedal?

[1piano4joe]

If you were to play a one octave C major scale with just your index finger and wanted to play legato by pedaling then how fast can your foot move?  M.M. = 100 is about as fast as I can play cleanly beating quarter notes. I made this exercise up because sometimes in a single measure of a piece there are several back to back pedal markings in a row and when the tempo is brisk my foot just won't coordinate with my hands. With thumb over, unorthodox scale fingerings and clustering my fingers are starting to fly so what is my poor foot to do? Is there such a thing as "toe over"? Yes, I'm kidding but seriously any tips on pedaling would be greatly appreciated. Also, I usually wear sneakers and find they go gweekgwak which means my heel must be moving. Is there special shoes that pianists wear when performing? I know there is such a thing as organ shoes which taper at the bottom so as not to hit other pedals I guess. Lastly, how quietly can you pedal? Should your pedal mechanism make a lot of noise? Maybe mine needs an adjustment?  When I'm playing pianissimo the pedaling is quite noticeable. I have a Schulze-Pollman upright. Do grands have a quieter pedaling mechanism?  

[49410enrique]

usually if it's very fast pedaling like in quick run, i'll usually flutter/surface pedal, and just let the ear decise how deep and how quick, i think there'd be a ton of work to do full pedaling in very quick passages in the traditional sense, unless a piece specifically called for it (i.e explicit instructions in the score like Percy Granger's music where he spells things out for you exactly how he wants you to do it).