Turbo (stall) Noises

Discussion in 'Ford' started by Craig Rogers, May 3, 2012.

  1. Craig Rogers

    Craig Rogers Read Only Funster

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    Hi all,

    MH goes into Ford tomorrow for a Cab service.

    We have the 2.2 with the 140bhp upgrade.

    One thing I've always noticed is that we get Turbo noises. The noise is the "flutter" type noise, most people think the sound is a dump valve but it's actaully turbo stall which is the blades of the turbo being forced to stop when the throttle is closed and the compressed air has nowhere to go. This is what a dump valve is supposed to avoid but most turbo diesels are not fitted with them. Most production petrol cars have them, but usually re-circuluating ones to mask the "Whooooooooosh" noise heard on Chav-tastic-Subarus.

    Anyway, just interesting to know if anyone else with a 2.2 140bhp has the same turbo noises.
     
  2. Geo

    Geo Trader - Funster

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    If your diagnosis is correct
    Everyone with the 2.2 and the 140bhp upgrade.should have it:Sad:
     
  3. Craig Rogers

    Craig Rogers Read Only Funster

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    Yep!

    Like I said, I don't think there's a problem, but whilst it's going in, I thought I'd mention it to Ford to see if it's normal.

    EDIT: Just done some more digging and it could be a result of having the side exit exhaust meaning the noise from the turbo is more apparent. Looking at some posts on the internet about the STi Mondeo (which has a similar setup). When they have been decatting the exhaust they start hearing turbo flutter. Also, there is a flaw in my original post. Diesels don't have a throttle plate historically, however, not sure on the duratorq as it may have one to aid emission control.
     
    Last edited: May 3, 2012
  4. hilldweller

    hilldweller Funster Life Member

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    Whilst on the subject, we have become aware of our Ducato turbo. At about 1800 revs we hear it spin up then it goes inaudible. At least I assume it's the turbo. Everything works fine.
     
  5. aba

    aba

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    yes they do go sort of supersonic as they get over 150000rpm
     
  6. Craig Rogers

    Craig Rogers Read Only Funster

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    Ford found no issues with it and also mentioned the side exit exhaust making it more noticable. :thumb:
     
  7. joner8888

    joner8888 Read Only Funster

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    140 hp---turbo dump whooosh--
    This has to be the way to get the younger generation in to Motorhomes :thumb:
    Just lower it as well --- ----- ---- Drain pipe exhaust :thumb:
     
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  8. Craig Rogers

    Craig Rogers Read Only Funster

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    That's my next mod! :Laughing:

    The way that Ford leaves the side exit exhaust is just wide enough to clear the cab, then Chausson make it wider with the Hab body and they just stick on a straight exhaust pipe to make it wider.

    Great!.....well not so as shown below and this was only 1000 miles into a 2000 mile trip so you can imagine what it looks like now. I'm thinking of replacing it with a pipe that points downward at the end that you normally see with high powered diesel cars.

    [​IMG]
     
  9. spannermanwigan

    spannermanwigan Read Only Funster

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    If my Fiat was chucking out that amount of soot ,I would be asking the main dealer why
    on a Two year old Vehicle.

    regards
    Steve:Eeek:
     
  10. Craig Rogers

    Craig Rogers Read Only Funster

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    Which is what I did today when it went for a service.

    Answer was as mentioned. Firstly the exit of the exhaust is a little silly, second it's 140bhp so you can expect a little more soot, thirdly if the VNT turbo (which is a new modern variable turbo with no wastegate) is spooling for long times (AKA going through the alps) and fourthly an oil change was approaching.

    It's had some tests today to find out what was going on and everything including emissions is bang on. What they did do however is update the firmware on one of the controllers (which I think was the controller for the Turbo) and it's made a big difference. Before, in my opinion, I found the Turbo too agressive and was really coming in sharp which is great for a Subaru Impreza kicking out 300bph. However, since the upgrade, the turbo (although no dip in performance) comes in far more smoothly making it more pleasant to drive.

    All in all, Ford has confirmed that there are no issues and I'll see how sooty gets on.
     

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