Butterfly Valves

1. Semple L-plater Joined: Aug 2007 Posts: 49

   #1 7th November 2007, 22:05

   any1 know where u can buy a butterfly valve exhuast from
2. leeK9 Established Member Joined: Feb 2007 letterkenny,donegal,ireland Posts: 1338 citroen saxo VTS

   #2 7th November 2007, 22:20

   a lot of american cars have them but dont know of any supplier over here
   dont really see the point unless its turbod.
   
   just sounds like a big blow out and will make performace worse
3. OLLYVTS Saxperience Post Whore Joined: Mar 2007 West Sussex . Posts: 5690 Subaru Impreza Wrx

   #3 7th November 2007, 23:14

   What is a butterfly valve exhaust?pics?
4. leeK9 Established Member Joined: Feb 2007 letterkenny,donegal,ireland Posts: 1338 citroen saxo VTS

   #4 7th November 2007, 23:22

   is a pipe that branches off from the exhust and has an electronically opened butterfly valve to let out the gases if on serious boost
   
   video in 2 sec
5. leeK9 Established Member Joined: Feb 2007 letterkenny,donegal,ireland Posts: 1338 citroen saxo VTS

   #5 7th November 2007, 23:25

   http://ie.youtube.com/watch?v=LVlHJSI7_oM
6. leeK9 Established Member Joined: Feb 2007 letterkenny,donegal,ireland Posts: 1338 citroen saxo VTS

   #6 7th November 2007, 23:28

   another demo video
   http://ie.youtube.com/watch?v=Ov-Kk297d34
   
   and this is bassically how it works
   http://ie.youtube.com/watch?v=nVAAErSuSgc
7. stevenet15 Saxperience Forum Bum Joined: Jun 2006 aylesbury buckinghamshire Posts: 4822 Astra Turbo, saxo vts, punto turbo

   #7 7th November 2007, 23:44

   i've been looking for one to fit on my turbo, you can get boost controlled ones in america that open automatically when on boost so there quiet when driving normally
8. Scottp Administrator Joined: Dec 2002 Glasgow United Kingdom (Scotland) Posts: 26097 Chelski Traktor

   #8 7th November 2007, 23:46

   not checked the link but is this not the same idea as an external wastegate and screamer pipe?
9. stevenet15 Saxperience Forum Bum Joined: Jun 2006 aylesbury buckinghamshire Posts: 4822 Astra Turbo, saxo vts, punto turbo

   #9 7th November 2007, 23:48

   Quote:

   Originally Posted by Scott not checked the link but is this not the same idea as an external wastegate and screamer pipe?

   basicly yes but its controlled unlike a screamer pipe its allways on where as this you could open and close it at will, plus its alot eayer to fit then converting my turbo with internal wastegate into a external wastegate
10. OLLYVTS Saxperience Post Whore Joined: Mar 2007 West Sussex . Posts: 5690 Subaru Impreza Wrx

    #10 7th November 2007, 23:49

    Quote:

    Originally Posted by my_vtech_eater another demo video http://ie.youtube.com/watch?v=Ov-Kk297d34 and this is bassically how it works http://ie.youtube.com/watch?v=nVAAErSuSgc

    
    Cheers mate i thought it was something like that.
11. Semple L-plater Joined: Aug 2007 Posts: 49

    #11 8th November 2007, 13:29

    u can get them so they fit to the rev counter, so say u set the valve to open at 2.5/3k rpm. when ur car idles the valve is closed and u get a normal sound, when u go over the 2.5/3k rpm u get the sporty noise.