after reading a thread - noob Q

[HSK]

just read a thread and im wondering, is it normal to see black smoke during wot?
i remember watching my friend's dsm race a rsx-s and i can recall seeing some black smoke when he start spooling.

 

[91awd]

Black smoke=fuel maybe running rich but it's nothing to worry about.

 

[GForce]

Yeah, my GSX would even puff some black smoke if I'd just sit there and rev it up to where it'd spool, it ran pig rich.