Insane smoke.
 

When the trucks are spooling up at the line why do some 7.3s take so long to spool? They just pour smoke out how do i acheive that?? You cant run twins can you??

you talking sled pullin or drag racing...anyways no matter what they are running big turbos that are real laggy and then pouring in alot of fuel

drag racing..Whats a big turbo i could run without insane mods.

With stock injectors your not going to gain or get anything useful... Any turbo you are talking about will require a T-4 mounting kit, be it a H2e, S-300, S-400 or a GT series Garrett.

The reason they smoke is lots of fuel, lots of load (brakes) to build boost before leaving the line.