With the mods listen in my sig, and running only 7psi of boost, is it safe to take the car all the way to redline? I know with the intake and bigger turbo the engine is seeing more ait but I wasnt sure if I would be running lean or no. Thanks for the help, sorry about asking a dumb-ish question.

 

Put it on a hydro-stat and see if it leans out, or what adjustments need to be made. If you add HP there is no reason at all you can’t still bring it to redline. Have to check you are getting proper fuel that’s all.