I agree with jb, what are u using to control boost, stock or after market? If adjusting the arm doesnt work the old dsm spring mod will help pretension the wga, question I have is why have a 18psi wga on a black?

 

Nah i tried to tell the dude to get a Grimmspeed for controlling the boost,

he is using one of those common Greddy Profec B controllers

We had it on the rollers again over the weekend the intercooler helped but still didnt make much power 271kw @28psi my car made 299.95kw @ 26psi with a GT3037s before it was built