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.
Dump valve diaphragm?
Has anything been changed/amended etc?
wen my wastegate was incorrectly set up it wouldnt boost but made the woshing sound
is it a rover tomcat turbo with the recirc. valve still in place?
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.Originally Posted by raj
its a t25 with a ktec t3 actuator had it on rolling road waste gate works ok. my old engine did this problem aswell.
no dump valve on car.
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!
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.
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.
Posting Permissions
Reply With Quote