hi,
i have audi a4 2000 1.8t and i have put apr chip. i love it. and then i changer diverter valve. i thought i will get that "swoosh" sound but i guess you have to put blow off valve right? is there are any way to make that "swoosh" sound with diverter valve?

 

You'd need a hybrid valve that recirculates some of the air and purges some. Running a full blowoff is not advised - the rich spikes will end up destroying your cats.

 

so basically i cant make it to make any noise with diverter valve?

 

even though if i would put cold air intake it would still not make that "swoosh" noise right?

 

If you're expecting sound similar to Evos, STi's, or even Toyota Supras - you'd be disappointed. After an intake, it would be more audible but it will not make a BOV sound.

 

I have the Forge Splitter and im very satisfied. Even without a cold air intake it was pretty loud.
Edit: and im not even chipped so its around 9 psi.

 

You will hear more of the BPV because the stock air box is designed to reduce the sound coming back out of the intake.


If you want more sound then get a hybrid valve, it will let you set how much air is sent thru the BOV part of the valve. You can get this type of valve from GFB or Forge.

GFB Hybrid. This one you can not adjust how much goes out each side.


GFB FX Stealth


They even seem to have one now that you can control from the cabin.



Forge Splitter(basically a copy of the GFB)