coll_52

iTrader: (1)

right was browsing youtube and cam across this clip this supra makes a really distinctive sound am just wondering what type of dump valve is on it its plasterd in hks so was thinking it was mabey running a hks ssqv

but have not got a clue would really love this sound on ma classic


http://www.youtube.com/watch?v=8hvv5qGRbEA

mikescooby

iTrader: (2)

that sound is not produced by a dv, when he lets off the air is going back to the turbo, you get thatwhen running high horse power and having a induction kit on it, i've herd a classic make that noise

coll_52

iTrader: (1)

ah love that sound wish my classic made the same noise so what your saying is ad have to be running a lot of horse power with an induction kit to even come close to that noise ooo well have to make do with my turbo smart and pannel filter

mikescooby

iTrader: (2)

i was wanting that noise aswel, someone here will tell you better than me

Scooby_CL

iTrader: (2)

that's just comp stall... you dont need masses of power just no DV.

to hear the full effect of stalling the turbo you need to run a fmic and open filter, running high boost will create a higher pitch kinda chirp from the turbo but still is easily reproducible on a smaller scale.

bigfarlz

iTrader: (9)

Not good for ur turbo though I've been told, greatly reduces life, and will take longer to spool. Having said that it does sound awesome!

Scooby_CL

iTrader: (2)

Personally with today's modern turbos there isnt any proven damage associated with stalling up the turbo... it 'did' effect older model turbos as the bearings weren't as tough... modern thrust or ball bearing turbos are very forgiving.

also spool can be aided as there is pressure already in the intake pipes, where by releasing the excess through a VTA dv or re-serc the turbo has to spool that back again.

but yes imo does sound pretty neat lol

Abuse

Correct me if I'm wrong but what your hearing is 'wastegate chatter/flutter'. It's the noise of air being dumped by an external wastegate fitted to a big turbo.

Scooby_CL

iTrader: (2)

your right in the fact that such a high powered car is going to run a big external wastgate... but the chatter/flutter isn't created by the wastgate. as said above the noise is created by excess pressure in the charge pipes going back towards the turbo and getting 'chopped' by the compressor blade.

this is a reasonable example... at the end after the flutter you can still here the comp blade rotating against the air as he is off the throttle coming to a stop:
http://www.youtube.com/watch?v=gz1dL_SGKy0

jayallen

iTrader: (31)

My old RA with FMIC, Large K'n'N filter running no DV or recirc with an 18g..

http://www.youtube.com/watch?v=PLPiJ...eature=related

coll_52

iTrader: (1)

awwwwwwww that sounds lovley