Hey,
It's possible to set up the Relay trafic bandwidth used : *RelayBandwidthRate* + *RelayBandwidthBurst* in the torrc file ;) https://www.torproject.org/docs/tor-manual.html.en (be careful, it will be used in both sides ! if you put 5MB = 10MB up + down used for relaying tor traffic)
And Transmission daemon can be set up from the web-interface, upload/download speed, too ;)
You will have to know your 100% bandwidth available for both, then you will be able to give what you want to torrent + tor
Thx for adding your relay ;)
ps: sry for this noise 1 month after :s
Dylan Issa :
unless, of course, torrenting is taking up 99% of your bandwidth and the Tor relay can only access 1% of it, naturally