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LYNCHSTAR
11-09-2008, 21:31
has anybody ever had a loud shhhhhh sound comming from turbo when spinning up and dont pull properly and it dosent sound like a turbo. its a T25 and it was of a mates car. there are no leaks on boost pipes or any hoses the carb is ok intercooler is ok manifold 1 way return valves are ok fuel pressure ok nobody can solve it any suggestons anyone.:cry:
Ian S
11-09-2008, 21:42
Dump valve diaphragm?
Northerner
11-09-2008, 21:47
Has anything been changed/amended etc?
tomdimma5
11-09-2008, 22:02
wen my wastegate was incorrectly set up it wouldnt boost but made the woshing sound
tobester
11-09-2008, 22:16
is it a rover tomcat turbo with the recirc. valve still in place?
raj
11-09-2008, 22:59
more than likly a dumpvalve diaphram leaking, i heard this happening to matty j's car. its like a constant hissssssss.
LYNCHSTAR
12-09-2008, 15:23
more than likly a dumpvalve diaphram leaking, i heard this happening to matty j's car. its like a constant hissssssss.
i have no dump valve any more ideas man.
LYNCHSTAR
12-09-2008, 15:26
is it a rover tomcat turbo with the recirc. valve still in place?
its a t25 with a ktec t3 actuator had it on rolling road waste gate works ok. my old engine did this problem aswell.
LYNCHSTAR
12-09-2008, 15:27
Dump valve diaphragm?
no dump valve on car.
UNICRONICUS
12-09-2008, 16:04
How long have you had the car? Does it have a cone air filter on it instead of the standard one? Having one of these creates a whooshing sound when the turbo spools up, I used to hate it so I put an OEM air filter setup back on and the sound went away like magic!
http://www.communigate.co.uk/ne/slaggyisland/phpwvGaw3
car.crash
12-09-2008, 16:08
this wont be much help but i had the exact same problem with a tomcat, car sounded like kit from knight rider, made next to no boost, i changed everything and nothing cured it, it looks as though it was the turbo up the spout even though there was no play.
UKG grant
12-09-2008, 16:49
i assume your running a boost guage, if so were from? and what psi is it reading?
LYNCHSTAR
12-09-2008, 18:37
i assume your running a boost guage, if so were from? and what psi is it reading?
i am running a boost gauge from top of plenum i even tried disconecting that to see if there was a leak. but no joy.:sad2: