turbo whistling( straight pipe )

vwgolf gttdi pd 130bhp

was thinking about straight pipe my golf pd 130bhp 1.9 but heard that this model does not turbo whistle(cooo when changing gear) when straight piped ?

Curran

Wrong section......but dont do it!

MetzgerMeister

The cooo is not turbo whistle, it's the sound of the air being let out at the blow-off valve.

Curran

MetzgerMeister wrote: »

The cooo is not turbo whistle, it's the sound of the air being let out at the wastegate.

Wastegate-gate....touchy subject!

Curran

^^^^ Awwhh - changing his mind!
You're worse than a woma......

Muckie

MetzgerMeister wrote: »

The cooo is not turbo whistle, it's the sound of the air being let out at the blow-off valve.

A neighbour near me has Diesel VW with a Blow off valve, sound of it reminds

of one of the old Volvo trucks going by, cool but silly.

MetzgerMeister

Curran wrote: »

^^^^ Awwhh - changing his mind!
You're worse than a woma......

I was half asleep when I posted that so f**k you

Curran

MetzgerMeister wrote: »

I was half asleep when I posted that so f**k you

In fairness, it wasnt Detailing related, so I'll let it slide!

Chimaera

That cooing noise marks you down as an idiot to those in the know. Unless you're making several bar of boost and >250 bhp you won't need a blow off valve on a diesel.

The reason they're fitted on petrol engines is because there's a throttle butterfly in the way and if that gets closed all of a sudden after sustained power delivery (like when you let go of the accelerator pedal) there's nowhere for all that boost to go except slam into the butterfly and reflect back into the compressor where it can do real damage. The BOV allows the boost to dissipate and keep everything in order.

A diesel engine doesn't have a butterfly so this isn't such a problem. At stock tuning levels there's enough room in the intake manifold for the boost to go without needing to get rid of it.

You won't get that noise just by fitting a straight pipe either. There's nothing especially wrong with doing this - it makes the turbo louder if you like that sort of thing. You might piss off your neighbours though with the noise. And I've heard from others who've done it that it can be tiresome at cruising speeds on the motorway.

vwgolf gttdi pd 130bhp

Curran wrote: »

Wrong section......but dont do it!

wat section then new to this

Curran

This is the "How to keep your car clean" section!

Best here or here - but be prepared for the heat!

Max Power1

Curran wrote: »

This is the "How to keep your car clean" section!

Best here or here - but be prepared for the heat!

Its a stupid idea. A golf is not even a moderately fast car. Sure, some of the GTI models are quite fast.
But putting a blow off valve noise onto a sub 200hp diesel (fwd at that) small car is just idiotic.

Why would you do such a thing? Do you want to look like an idiot?

vwgolf gttdi pd 130bhp

Max Power1 wrote: »

Its a stupid idea. A golf is not even a moderately fast car. Sure, some of the GTI models are quite fast.
But putting a blow off valve noise onto a sub 200hp diesel (fwd at that) small car is just idiotic.

Why would you do such a thing? Do you want to look like an idiot?

im not the first person to do this and will not be the last !

Muckie

Just because you can, doesn't mean you should.

Tasteful mods, less is more job.

Don't be seen as a "felter".

The VW driver near me even had a Nurburgring sticker on his boot too....:rolleyes:

Max Power1

vwgolf gttdi pd 130bhp wrote: »

im not the first person to do this and will not be the last !

You have two threads in two fora about this

You are still out of your brain if you are seriously interested in this sort of thing.

Here is what you want:

https://www.youtube.com/watch?v=A2TNj3HRb84

Ronnie Beck

A de-cat is a decent mod on a tdi. Your turbo will work better. I would replace it with a silencer if you do any sort of long distance cruising. As for the cooo, it sounds ****. Don't do it. I you really want the unnoticeable performance increase get one that hisses and doesn't make that stupid noise.

thecomedian

I had to YouTube this sound.
It's the funniest and stupidest sound I've heard in awhile.
Why would you want this?

Dartz

Do it.

And put a duck call or whistle or some other daft wind-blown noisemaker on it.

If you're going to fail, own the fail and turn it into win.

dgt

Well that's a lot of flapping in this thread.... The famous coo is from the wastegate closing affecting the turbulence, it's more pronounced in later cars due to the vnt setup (turbulence from the rapid changing of direction and slowing of movement of air). A dump valve in a diesel is stupid!

VNT turbo




A noticeable difference...

VNT coo

https://www.youtube.com/watch?v=cCnRUUXREBQ

https://www.youtube.com/watch?v=CNA0MXu5CpI

Wastegate coo

https://www.youtube.com/watch?v=PZgVZHp0ziA

https://www.youtube.com/watch?v=IxFRBgVqtpg

And why it all started

https://www.youtube.com/watch?v=lr6Gp6pPoco

So next time you hear a coo from a felted car remember it's symbolising a Fiat tractor :pac::pac::pac:

I'll shut up and hide now....

kona

Should have bought an avensis, comes free.

Tea 1000

dgt wrote: »

VNT coo

https://www.youtube.com/watch?v=cCnRUUXREBQ

https://www.youtube.com/watch?v=CNA0MXu5CpI

Wastegate coo

https://www.youtube.com/watch?v=PZgVZHp0ziA

https://www.youtube.com/watch?v=IxFRBgVqtpg

Wow, those all sound hideously shíte.
"Look at me, I've got a shít car and I want everyone to know!"
The Fiat sounds good though!

Mycroft H

Diesels are great

Max Power1

BX 19 wrote: »

Diesels are great

I can see it now, the brand new Fiat Pigeon!

dgt

Max Power1 wrote: »

I can see it now, the brand new Fiat Pigeon!

Ironically Fiat turbo diesels don't coo, they surge/flutter :cool: must get a vid up after to show what I'm sh*te'in on about this time :pac:

Having said that, I'm on a mission to try have a coo-ing idTD for lols :P

Edit: Feck that I'm at a computer

https://www.youtube.com/watch?v=ngS96Ohc7UY

Wonder does it have a digital dash....

vwgolf gttdi pd 130bhp

Max Power1 wrote: »

I can see it now, the brand new Fiat Pigeon!

will u stop fishing for thanks(likes), your only a gob****e

Max Power1

vwgolf gttdi pd 130bhp wrote: »

will u stop fishing for thanks(likes), your only a gob****e

*You're

The only "****e" will be from the pigeon wannabe that you are making.

ofcork

Theres a passat around cork and everytime he changes gear there is the cooing sound from it,couldnt listen to that all day.

Chris_Heilong

Thanks dgt, I never heard diesels do this, I still think pertols have the best sounding valves sounds, none better than the Supra, its fantastic but may sound terrible to the same people complaining about the coo.

skip to 0:38,