Tuning Dump valve for the 20v turbo

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Tuning Dump valve for the 20v turbo


New member
Dec 6, 2005
Any recommendations on which type of valve to use and also if anything else needs to be adjusted if I do fit one? Are there real benefits on fitting one?

Also does anyone know where or how I can hear what it sounds like before fitting, maybe a wav download or something?

I had one on my Delta Evo and it sounded ace, but when I fitted an aftermarket (no box) air filter I didn't like the sound it produced, instead of hearing just a nice clean Phhssst when decelerating I got a phhssst followed by more moving air noises of which I can't explain, sorry. I would like it to be a clean induction noise followed by a clean simple Phhsssstt.

Any advice welcome. Thanks
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What air induction u using?
I have a straight induction pipe which caused my dump valve to change sound. But i have a dv26 and its a very nice atmos dump valve with a clear sound on a normal setup!

Right well mines was completely standard when i got it bar the dv26. Its an atmos DV and is very loud! Lovely sound it makes!!! U checked out www.fiatcoupe.net then onto the forum yet?