hey, ive heard this noise a fair bit, just wondering if anyone knows what makes it

its like a highpitches whistle on gear change, is it the Blow off valve or wastegate or is it compressor surge or something else...
http://www.youtube.com/watch?v=oUEH-DpmVrc

is

 

yeah its the BOV ricers love them

 

what type of BOV??

i know all dont sound like that, i got a Atmoshpheric one, but i assume its the funnel design, if anyone could tell me what type it is that'd be cool

 

sound like SSQV

 

greddy type s guranteed

 

definitely hks ssq... it shows the bov in the fairing at about 18~19 seconds in the video

 

i was sitting here about to ---- myself watching how fast this thing is then i realized its in kph and not mph but still sick nasty none the less

 

Thanks for clearing that up. Saw it go from 100 to 130 in what seemed about half of a second...

 

ssqv. sounds just like mine.
my brother has a greddy type-s on his stealth and it sounds nothing like that.

 

That's MPH. Most 'busas came factory with a 220 mph speedo, but maxed out in the 180's. If that was KPH, he would only be doing about 120mph @ an indicated 200kph.