I left my Greenstuff (fronts - stock in rear)on from when I ran Watkins Glen 2 weeks ago and carried a spare set (Greenstuff) with me ready to change.
I didn't wear much at all surpisingly. I still have a couple more track days on them. Mosport only really has 1 really hard braking area (turn 5) and a couple low - medium braking turns (3, 10). I thought I was braking pretty hard (not just limping around). I must have done OK because the instructor recommend me to the advanced group next time I go which was a great ego boost for me.
Yes to the brake ducts replacing the fog lights. My friend had incredible results by adding ducts to his Prelude, so I thought for just a little cost, I would try it out at Mosport. I am not sure what real effect it had because I don't think this track was that hard on brakes. It might be a different story if I ran Shannonville (for the Canadians) or Gingerman (for the Michiganders).
I got some 3" brake tubing and used the fog lamp bracket less the lamps to wire it to and ran the hose through the 2 cutouts in the underside deflector/skid protector (or whatever you want to call it). From there, I wired it to the frame and hooked it around the rear half of the a-arms (I think that is what you call it) using mostly wire. I found it tricky to try to keep it close to the rotor and hub.
I squished the tubing from a round o-shape (original) to more of a flattened o-shape so that it would not rub on the bumps when I drove it to and from the track. This way I would not have to fumble with it before and after the event.
I think the trick really is getting it close enough to the rotor to make it worthwhile.
If it isn't, I would think the cooling air gets blown down stream by the normal turbulent air around the wheel well.
This was my second event with Victoracers. They worked very well. I'm relatively new to R-compound tires so all I can do is tell you how they compare to my S-03s. Incredible grip in the corners!
Hope that helps.
