Stu.wrf450 wrote:I cut the muffler out of my auto sr5 and I get the whistle when I back off the accelerator about 2000rpm!
Jazz wrote:I have asked my work mate what actually makes the whoosh noice on his Nissan Sylvia 180 and he explained to me that the noise that happens is when the air is getting sucked in you get a sucking noise and when it is released it goes through the turbo blades making the noise you hear. As for the blow off valve or waste gate they increase the sound of the air being released
Hope this helps
and he also said putting a better air filter also helps
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