My Guess it's a bleed valve righ, your wastegate has a set pressure point stock t25 is 7or8 depending how new or used. No wastegate signal will cause higher boost and may result in premature wastegate failure you kow because it just pops open fully no creep thats why wastegate have to be replaced or upgraded to external for race applications. Using a boost controller that stop the signal from reaching the wastegate for racing or sporty activity on a use wastegate I wouldn't recommend unless you can afford it. (not saying it can't be done or shouldn't) You can use the pressure pump with a gauge to see what your wastegate will open at that is your stock boost(WG nipple), Pressurize the turbo to find max boost with out the WG signal you can safely open a bleedvalve all the way if the WG open at a safe psi i'd say 12
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