So here the problem , I have recently just installed my front mount intercooler along with my greddy bov. The bov does not seem to release the extra boost like it is suppose too . Along with that there's is this fluttering sound coming from the intake/turbo area . I put my head next to the intake and bring the rpms up then release the throttle , then the flutter comes after . I've been reading and searching other forums , some say compression surge and some say change the spring rate of the bov . Has anyone else had this similar problem and have a solution for the fluttering ? The other mods are invidia turbo back , spt intake ,invidia up pipe and open source tune on 17 pounds I don't know if that will help . If someone could please help it would be greatly appreciated .