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lol@steve. Hehehe, matey VL's dont have a BOV from factory so the sound ur probably talking about it compressor surge. If u got a stock BOV on ur R33 take the vacuum pipe off the top of it, block it off so the manifold is sucking in unmetereed atmosphere and bobs ur uncle u have a vl sound. But this means ur bov isnt working and compressor surge is occuring. Not recommended but hey if u want the noise go for it!!!1

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yeah the sound is from the compressor surging as its gets spun back by reverse air pressure cos the stock bov is blocked. its just like putting your head behind a desk fan and talking behind it, your voice gets "chopped". this is what happens to your turbo with the bov blocked, air comes in the other way and gets chopped by the blades. its been known to damage the turbo and slow down spool up times. the vl does it as it wasn't released from the factory with a bov so the air just back spins the turbo charger every time u close the throttle

aka "its a bad noise"

it gets amplified with an intercooler as it echo's through the piping too

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a lot of people dont recommend blocking the factory bov. its there for a reason. numerous people have damaged their turbo's from doing this (blocking the stock bov) cos they want the crappy "vl turbo" noise.

it sounds retarded, affects spool up times and shortens the life of your turbo

hope you have some money around to rebuild the turbo if you wanna keep your stock bov blocked and have the silly noise :)

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