Stupid *** question but I'm a noobie to internal wastgates. There is no possible way to control boost spike other than porting the flapper?

 

i ported and rounded mine out alittle bit, and i dialed in alittle preload on the flaper witch helped some. installing the blitz dsbc helped some too, but i think this is just an inherent problum of that turbo. other than that it's a nice unit. P.S. as i went up on boost (16-18 psi) i found this problum to get more seaver.