--------------------------------------------------------------------------------

bought a new 91 plate s2 3 weeks back and since ive had it had no end of boost problems . the car has under gone a full rebuild over the last year and when the previous owner put it back together i think he rushed it . the engine is speced as follows piper285t cam , hybrid t3 , -31 actuator , kn , mongoose chipped , and a bloody bleed valve . the problem i have is no matter wot the bleed valve is set to the car will only pull just under half a bar of boost and tails off quickly it also makes wot can only be described as a jet engine noise when boosting ( not sure if this is because of the hybrid as all the s2's i have had in the past have been same sort of spec but on a standard turbo and no bleed valve ) . it also seems to to hiss more than whoosh when the dump valve goes off had loads of turboed cars with bailey twin piston valves on b4 but never one that sounded like that .
my thoughts are that either the actuator is going week or the dump valve is ?
any ideas would be most appreciated guys

 

get the dump valve off.......mine d/v should arive today....mines nearly ready....come on

 

removed dump valve and plugged the hole and the vacum ..... did exactly the same just instead of dumping it maded the waste gate chatter with turbo stall , wot about doing away with the bleed valve there is still an amal valve on the car all wired in with just the 2 hoses off and joined to the bleed valve?

 

Not quite the same but i had a cavalier Turbo diesel that made the very same noise and didnt go very well. we had a look and the hose had come off from the turbo to intercooler.Only very slightly but it sounded just like a jet engine . try looking for leaks or splits etc. If its leaking then you wont be getting very good boost etc

 

if the bleed valve is fully closed ...taking it off isnt going to do much...ummmm

 

split hose somewhere?