15x7, is my assumption? I would like to know what the wheel is, but I suppose it doesn't really matter. It would be great to know if you actually want to use them for traction or not, but I have to assume by your previous post of "put it in fourth and burn until I'm afraid" means that you just want cheap rubber to burn.
Touchy subject in such a vague question, which is why no one wants to respond. I'd love to see your car do fourth gear burnouts, but I don't want to see you die on the way home in the rain. If all you want to do is burn them, then buy a 50 series tire from CT or Fountain, or wherever sells them the cheapest, in the widest they advise you can run. If your rim is 7" wide, then a 245 is probably about your max, and a 632 should burn those on the primaries at quarter throttle or less. I seriously cringe at the thought of you wanting to do this. An easy $25k in drivetrain to be able to do burnouts is downright silly to me. But I digress, different strokes for different folks.
If you actually want performance and traction, then this conversation is going to go a completely different direction. We are going to need a lot more information if you want to go that way though.
Oh, and we most certainly are going to need to see pictures of this beast before we can offer any more advice. It's the rules.