I know its just a video but if anyone have any idea what kind of blow off that S14 has please says so, i just cant get enough of that sound!

YouTube - Sickest Sounding 240sx

 

That would be compressor surge my friend

 

+1 on the compressor surge. its a hks ssqv. wit the spring set really hard

 

yea i agree its hks ssqv or if not it also sounds like the SARD R2D2 fast ass car too sounds nice......jus dont like how they dyno the motor its self....old vid but still good

 

actually i belive its a tial they are using with a stiff spring

 

sounds just like my shrouded gt35r with no bov

 

This car was posted on FA by the builders/owners a long while back. It's Sweedish and made 700hp at the crank eventually (that's an engine dyno in the vid). These guys are a bunch of legit engineers.

But yeah, whatever BOV they have is either set really stiff or does not exist. I'm almost certain that they're using a ported shroud, too.

 

+1 with this comment. No BOV and Using a garrett style Compressor housing.