Originally Posted by
Caddyshack
The small hose is a vacuum pipe to pull the dump valve open…it must be blocked off.
the chatter noise is the compressor wheel stalling against the built up,pressure when you close the throttle.
you may need a smoke test to rule out any leaks. You will hear turbo whistle though as that is the boost pressure building, they will always do that.
Do you have a boost gauge to check it is creating the required pressure and not venting somewhere like a split intercooler.
ive not checked the boost pressure i need to get a gauge and a t peice. the smoke test would be a good one. the waste gate actuator is set up right with the right base lift. ive got everything blanked of that should be. it does hesitate a bit under acceleration but in general it pulls hard and well. i called autodynamix at newtonabot they said the indution noise is alot louder as i have a big k&n air filter and a 4x4 bonnet. i could fit the std re circ valve it wouldnt make the induction slightly quieter but it would stop the waste gate chatter which i like so everything is how it should be. so there going to source me a std saff air box which will quieten it down just enough. basically im an old fart now. ive made my own stainless three inch exhaust with stainless wool inside its so much quieter than the mongoose but still breaths well. its so much more pleasurable to drive. i have lost a bit of performance but you cant really notice unless you get it in to the rev limiter i dont want to do that anymore