Use Scrapetorrent to find whatever torrent you're looking for. It shows up search results according to number of seeds.
As for increasing torrent speed using active trackers- dunno if this helps, try this process out.
=> Once the .torrent file is downloaded, head over to BtReannouncer. Upload the previously downloaded torrent file in the upload section. What the site does is find alternative trackers for your torrent meta file. These trackers are then shown along with the original trackers. Select the extra trackers you'd like to add to your new metafile on the screen shown below. Then press the "Reannounce" button.
=>Download the reannounced torrent file on the next screen
=>Now head over to Torrenteditor. This site does the hard work of finding obsolete trackers for you. Upload the reannounced torrent file in the first page and press the edit button. On the next screen, the "tracker verification" would start. Bad trackers are demarcated by a red highlight. Cross off bad-trackers on this step
=> Scroll down and click 'update'. After the good trackers are loaded onto your new torrent file, download the final fruit of your labor by pressing the "Download" button.
Credit goes to http://atunu.blogspot.com/