if i install a meth kit. I know i'll be using it for racing or as if installed would it be spaying at all times meaning racing or just regular driving? And i would need to get it retuned.

 

You can set it up to start spraying at a certain psi, which would mean on the street it will only be used when you hit the set level. You will need to tune for it, otherwise your afr will be way rich.

 

With a properly setup system it should only spray under boost. While under spray it will also raise your boost on roots type sc because the mist will acutally create a beter seal with the liquid going thru. I get extra psi when the alky start to flow. Also alky will stem clean your cylinders, so your plugs should look like new.