E-303 cam in an auto

I've heard that you have to upgrade your torque converter to see any kind of a gain from this cam in an auto. I've talked to several people saying that they put the cam in and didn't see any improvments because of the above. is this true? anyone have it in an auto and not have problems? Thanks fo rteh help.
 
If you get the E303, Definately get at least a 3000-rpm stall.

I won't recommend the E303. Get a cam with a 112-114 LSA. The e303 isn't worth the hassle in a auto SN95.