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cdti valve dump

Cdti dump valve
#1
Hi guys, correct me if I'm wrong but does the cdti have a dump valve? I hear the whoosh sound when changing 1st, 2nd and 3rd gears and wondered if you could mod it to make it louder?


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#2
I must say I've not heard it on my 2.0 and TBH I don't know if they have a dump valve or not.
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.
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#3
They don't have a dump valve but I believe they have a recirc valve. As for making it louder not sure if you can. A cone filter might do the trick.
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#4
Cone filter on mine you could hear more of a sucking noise, but tbh that was about it, maybe try putting a bigger airbox to turbo pipe and a better cold air feed, should do the trick!
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#5
I tried a cone filter on my cdti and it was horrible sounded like darth vadar, took it off after 1 day

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