Nursedude

I have a VERY fast DSL connection with Bellsouth.net.....6.3 on you download test here....but I know some people in my zip code are getting the MAX upload which is 512...but they are not as fast as my download...I can't seem to get above 415-430 on my upload? Are there any tweaks for getting faster upload speeds...I certainly don't want to mess around with my Download....it's GREAT! Thanks for any future replies