i have a sts turbo on my chevy silverado 2005 5.3 v8 i have upgraded injectors headers thats about it right now lol but i was wondering how much boost my motor can handle i have a 10 spring on there right now im at 5-7psi but i want to boost up too 10-15psi... my truck is still slow to me at 5-7psi but i also have 22's on it i dont know if that maybe wieghing me down but just let me know what yall think