dump valve

1. Kman Infrequent Poster Joined: Dec 2008 Isle of Wight Posts: 191 Saxo vtr Turbo Saxo vts

   #1 3rd November 2009, 16:32

   my dump valve seems to chatter? (dont no if thats the right word) rather that ttssshh is there a reason for this????
2. Slugshead Established Member Joined: Jan 2009 Cardiff Posts: 1087 1.4 Red Westcoast Mk2 Posi Blue VTS

   #2 3rd November 2009, 16:37

   sure its a dumpvalve rather than wastegate chatter?
3. gixxa Established Member Joined: Feb 2007 manchester Posts: 1704 vtr turbo

   #3 3rd November 2009, 17:49

   wont be dumping the air quickly enuf, so boost is hitting the turbo imprellor.
   
   Mine did this will all piston dump valves so have had to use a diaphragm one
4. sexoturbs Established Member Joined: Jan 2009 luton Posts: 1013 saxo vtr turbo

   #4 3rd November 2009, 17:54

   has it always dont that? or just recently started? check that the pipe from the dumpvalve to the inlet manifold is on properly, isnt blocked and isnt cheap tubing that closes up when its put inder suction
5. Kman Infrequent Poster Joined: Dec 2008 Isle of Wight Posts: 191 Saxo vtr Turbo Saxo vts

   #5 3rd November 2009, 18:54

   nah its just the way it is i only fitted the turbo kit on wednesday and then broke the mushroom cap so only got it running sunday so not long.. ill have to check the vacume pipe.. not keen on the chatter id much prefer the ttssshhhh.
6. miamibluebaby Established Member Joined: May 2009 Ellesmere (Shropshire) Posts: 1044 superchared 106 gti

   #6 3rd November 2009, 19:02

   whats it boosting at? may not be opening properly because the diaphram is rated for higher boost, so just opening and closing very quikcly. most likely its not opening atall and its the air hitting the impellar blades
7. camTcar Frequent Poster Joined: Apr 2009 borders, and washington Posts: 758 mk1 vts and ltd edition corsa

   #7 3rd November 2009, 19:04

   wish my car went tttssssshhhhhh
8. ryanmt Established Member Joined: Oct 2004 Warrington Posts: 1987 AX VTS 57 3.0 TDI A5

   #8 3rd November 2009, 19:41

   Quote:

   Originally Posted by Slugshead sure its a dumpvalve rather than wastegate chatter?

   wastegates dont chatter. The chatter noise is compressor stall
9. gixxa Established Member Joined: Feb 2007 manchester Posts: 1704 vtr turbo

   #9 3rd November 2009, 20:24

   dam this thread, its made me put my old dump valve back on for chatter lol
10. saxohull Infrequent Poster Joined: Sep 2009 Hull Posts: 169 S1 106 Xsi running 148whp

    #10 3rd November 2009, 20:26

    there a waste of money anyway, get a recirc valve on it, youll still hear the tsshh noise if you have a open filter on, plus the benefit of keeping the spool going and preventing stall