Hi mate, you need to remove your Dump valve from the metal intercooler pipe (you dont want your dump valve here as it is after the turbo) , block that hole up. And put it onto the other hole that you originally blocked up (before the turbo).
That will allow the Dump valve to do what you want it to do, you shouldnt get any chatter and its better for the turbo. Could loose some performance though and could also throw up an engine management light.
Best thing to do is when you can afford it buy an uprated diverter valve like a forge 007p and put that on the car exactly how the standard one was.
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Its all getting confusing now
i did put it on the other hose the one with air filter connected to at first but it didnt make any noise but still had the chatter. i didnt think there would be any pressure built up there anyway as its only an air feed for the turbo.so once the turbo sucks in the air and you let off instead of recirculating like it would with std valve its then pushed back out the turbo which is when you get the chatter.so if i have it where it is its going to relese some out but some is still getting pushed back out.but if i stick std air box/filter back on you can hardly hear the chatter.it drives fine no lights come up or anything so will just keep it like it then as there must be loads people who run there cars with them without any problems.
