If your goal is to get your stone hotter than your oven max temp, and you have a gas oven with the burner under the oven floor, place your stone directly on the floor of the oven. This will get your stone hotter, faster, and exceed your oven max temp by as much as 200 degrees or more. If you have an elec oven with an exposed element just above the oven floor, placing your stone as close as poss above the element will also get you higher temps.
Having said that though, having your stone hotter than the top heat (air temp) hitting your pie is actually the reverse of the ideal for some styles, and usually not a good thing. But I have heard of folks doing something like this, then moving their stone under the broiler for the bake.