So I drove my car home from work for lunch today and everything was just fine. half an hour later when I'm driving back all of a sudden I have a big problem.

FYI I have had the K&N SRI on it for like two weeks now. Anyhow I'll accelerate and then when I hit the clutch instead of the usual whoooosh sound I hear something like taka-taka-taka-taka-taka-taka. And it's under very low loads as well. It's nothing close to the normal whoosh sound or the panda sneeze that I'm used to hearing from the K&N SRI. Also, I noticed that it's not building boost like it normally does. I'm not too familiar with the BOV setup. What should I take a look at first? Has anyone had similar issues?

Thanks

 

First off we have a bypass valve not a blow off valve. Second off I don't really see how it would make this ticking noise to be honest. The inside of the BPV is rubber.

 

well it almost sounds as if something is flapping as it's letting out the air.

 

Could the rubber part inside the BPV have cracked maybe? Just a guess

 

Like this at 0:20?

FILE0138 - YouTube

 

That sounds similiar, because it flutters like that. I think my issue sounds more rough than that though.

 

I found this explanation of 'turbo flutter' so maybe that's what's going on. Does anyone know if using the forge diverter plate could potentially solve this problem? See below for the explanation.

Turbo Flutter Explained

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Ever wondered why or how you can make your turbo make that 'flutter' sound? It sounds great doesn't it?

The only problem is that this flutter is extremely unhealthy for your turbo. The flutter is caused when the throttle is shut and air caught betweent the free-spinning turbo and the closed throttle (when you have no vent ie blow-off valve).

The consequent back pressure forces the air back through the turbine blades. The more technical term for this is 'cavitation', which places enormous loads on the turbo and can or more than likely WILL lead to premature wear of the turbo bearings and other load-bearing components.

The simple fix is to simply fit a blow-off valve to your current setup or to make sure the blow-off valve you have selected is correctly matched to the output of the turbo and is working correctly (ie not outside its flow capacity).

So whilst it is a great sound and I absolutely love it myself, it pays to try and rid your system of that sound, unless of course you have deep pockets and don't mind forking out for new turbos prematurely.