That flutter that you are hearing is called compressor surge. This is bad for the internals and can lower the longevity of your turbo.

 

Had my mechanic who helped install the cold air intake listen to it. Said the turbo and valve sound just fine. Tried to replicate the flutter and got it a couple times, said that its not compressor surge but the DV. Said everything is fine. Plus I only have 7k on the car still got 43k left on the warranty if anything happens. And the dealer up here is a sponsor of our local club and are cool with mods.

 

johngrizzle please please please upload a video with that frrr sound, i really wanna hear it so im certain we are talking about the same thing here!

 

jonrizzle?

 

I will do it tomorrow for you guys if you want. I have a custom made 2.5 to turbo's 1.75 ss intake. yes 304ss I know it's bad for things and stuff to use metal, please don't tell me.

The noise you are hearing as stated is a form of what most would call "compressor surge". Just because this fact goes unmentioned a lot. I think it's worth noting what real compressor surge is and what it does. Actual compressor surge is caused when your engine can't pass enough demanded air to spool a large turbo and creates a massive blockage (<-- poor adj. its late). This "acutal compressor surge makes things explode." because your essentially pulseing huge air pockets that act as waves of anger against not only the turbo but the engine. Now truthfully I'm not sure if the concern is the fueling nightmare it can cause due to the fact that the air has been metered once it hits the turbo. But do to the pulsing nature of compressor surge is entering the engine un-calculated causing wildly lean, and rich mixtures. Or and my personal belief that the amount of force against the compressor through not only the oscillating surge of air but the excessive vacuum is so great that it rips the ceramic fins apart.... don't know, sorry :(

The "surge" (no proper nomenclature has been esthablished to my knowldge) your after is air backing up against the compressor fins. While it is not good for the turbo, it's not as bad as you might imagine. Turbo's are more stout than people give them credit and typically fail for many other reasons. in support of my argument think Jake Brakes.

Anywho, In your quest for the choo chooo chooo noise that we love there are a few things you can do. For starters increase resonaet frequencys. IE make stuff out of metal. The noises your after are happening, you just can hear them beucase supple plastic is absorbing the audible goodness. True stroy, this is why I have made my intake out of thick metal, because it makes cool noises .... im not joking.

Further, you can increase your bypass valve spring. This spring is actually a key feature. When you let off the throttle the DME commands the BPV to open and the electro mag pulls it open. We can slow this down by adding a stiffer spring to the blow off valve. By doing this the bypass opens slower and keeps pressure in the charge pipes longer and against the compressor fins.

Finally, a tune has made a huge difference. I turned up da boost in the mini. More air means more air being pressed up against the compressor fins, means more amplitude to the resonance, means more choo choo.

ps don't by after market BOV's for your MINI ever . there are lot's of reasons not to do this, but not going to jack the thread.

 

You won't get a CEL with an N18

 

what is a CEL and what is a N18?

 

CEL = Check Engine Light
N18 = the Cooper S 2011 onwards and Cooper JCW 2013 onwards, have the N18 engine

 

what about the minis that are 2008 manufactured? whats their engine called and will the have the CEL light up?

 

2007-2010

N14

A plethora of people with N14's have reported a CEL due to the spacer.

 

Guys i think im totally lost here, i don't have any knowledge regarding technic stuff nor mechanics and after all these posts im sorry to say that i have absolutely no clue what to purchase in order to be able to make that fluttering sound i love. Can someone explain to me in simple words what should my first step be towards that frrrr sound im after? (im hopeless )

 

If you are wanting to buy something just because of the little fluttering sound you love, SAVE YOUR MONEY.

 

Well thanx but why save the money? I think its exactly the same reason why one buys a mini. You don't buy it out of practical reasons or logic, you buy it because you simply love it.

 

I'd ask you to save on the spacer and invest in a Cold Air Intake. CAIs give more of the flutter and works that you may be looking for. Had the forge spacer on my MK6 GTI and it made it sound like a bus every time I lift my foot from the pedal. Then the CAI I installed added the flutter every now and then which was very nice to hear.

 

I have the full Forge BOV not the sandwich or their DV and I get no cel and I get the loud sound, yes is $290.00 but it works better than the stock creepy one atleast at 21psi that I run. no cel at all.

 

You don't want a flutter sound....that's not a good sign. Now if you get a "pssh"...your turbo is good.

You will get the flutter sound if....(1)your tune has been programmed to open and close the DV in rapid succession to hold more boost during a shift.
(2) compressor surge...no bueno for the health of the turbo/potential engine failure.

Sorry if its been asked but what year is your car?

 

its a 2008 R56S model

 

You'll most likely get a CEL if you run the Forge adapter.

If you at least want the 'Pssh' sound, purchase an open intake like the one NM-Eng sells.

That's your best bet to get sound without any funny business happening to your ride.

 

it seems like everyone is saying that forge either makes the adaptor for the psss sound or a diverter valve to replace the stock DV. Forge does make a full blow off valve system that tiny turbo terror mentioned. it replaces the whole stock DV and gives you the blow off valve sound. its 290 on their website. the DV only is 260 and then they have the adaptor that you can put on your stock DV to get the sound for 95.

 

jordan.burks you mixed me up now? From what you stated i don't understand what is needed to purchase in order to hear that sound im looking for?

 

You still haven't bought one yet? This thread was started almost a year ago.

Go buy an HKS SSQV blow off valve or a TurboXS RFL blow off valve. You'll need an adapter as well.not sure if you'll get the flutter due to the fact that you will be running no where near the boost levels of the cars that were making those sounds in the first video you posted.

It really is a quite pointless modification for the money you're looking to spend, especially with the possibility of lost performance and potential CELs.

 

But didn't you hear the sounds from the R56S minis that i posted? What about them and their boost levels?

 

Just go buy one already. You're going to lose performance and have the possibility of getting a CEL.

Every car in every situation is different. The only way you'll know is by buying it and testing it out.

 

Wouldn't you agree in the fact that if there was to be loss in performance why would Forge make such a bov? And that bov ix specifically designed for R56S or the equivalent Peugeot. Even if there was an issue wouldn't Forge either fix it or stop producing it? Am i making sense?

 

Then buy it. A lot of this forum's most knowledgeable people have advised against it. You seem to want someone to just tell you it will be ok. People also buy intakes with no proven performance gain, so why do companies manufacture them? The simple fact of MAKING MONEY. Forge also states that things are for off-road use only and they are not liable for any damages that may come up when you use their parts.