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  1. #1
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    Strange howl from my 850R



    Hopefully this works........

    My 850 R howls under boost, anything above 80% throttle. It is really loud.

    Goes like a train, just cant figure out why its doing it.

    Didn't used to do it.

    No loss of boost.

    Baffled.........
    08' V50 D5 R Design
    09' V70 2.0D R Design
    My investment: - 96' 850R estate manual

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    08' V50 D5 R Design
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    Mine does something similar. Think it will be a boost leak somewhere, a small one won't effect performance much. I've got a dump valve on mine and I suspect that's what's making a noise on mine. Your best bet would be to use a boost pressure adapter so you can charge the pipework with an airline whilst listening for leaks.

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    I've inspected from the turbo to the top of the intercooler. The reducer pipe on top of the turbo has seperated internally and I thought I'd found the culprit. Got a replacement and its still exactly the same...

    I would suspect that if there was a little leak it would seep a bit of oil.

    I wonder if the intercooler is where the problem lies.....

    Will have to get underneath sometime soon to look further. I have a homemade RIP kit on it so most things are in tip top condition.

    I want to hear the T5 sing, not some load howl that drowns out everything!!
    08' V50 D5 R Design
    09' V70 2.0D R Design
    My investment: - 96' 850R estate manual

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    Had a similar noise when i fitted an 18T to my `97 T5 It was the turbo howling

    It was due to too much boost but i liked the pull so left it as was.

    When the boost and power reduced the noise stopped.

    Because you have made your own RIP kit you have to watch the boost. You may be pulling far more than required for the same power?


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    I have a boost gauge. She only max's out 11/12 psi.

    She does have a rica ecu fitted. Maybe I should try the original back in it and see if it sorts itself out. Least I would know either way.
    08' V50 D5 R Design
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    My investment: - 96' 850R estate manual

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    I had the equivalent remap HML 310 i believe it was and it was designed for the 18T.

    The noise is airflow though the turbo as i had also modified my air filter quite drastically as you have also modified your airflow.

    The more boost you have the more air is required also and quickly.

    You may probably find if you return your airflow back to standard the noise will go.

    Doesn`t your Rica overide the std. ECU boost figure ?

    What boost guage do you have as a 30psi one does not read properly they are not calibrated accurately. They seem to idle so low and therefore the boost is equivalently lower?......I ended up with a digital boost guage which was really accurate.


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  8. #8
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    Quote Originally Posted by Timo. View Post

    Goes like a train, just cant figure out why its doing it.

    Didn't used to do it.

    No loss of boost.

    Baffled.........
    Hold on a minute. Timo said and I quote, "It didn't used to do it". Now I assume by that you mean, you haven't changed anything, now all of a sudden it's making the noise?

    So, If you refit your OE airbox, stock ECU or whatever, you're not diagnosing the problem, you're simply masking it!

    That's the same as turning a blind eye to a bald tyre! Just because you choose not to look at the bald tyre, doesn't mean it'll suddenly gain tread. Eventually, it'll cause you to either get a puncture, have an accident or you'll get a fine and 3 points OR in your case, masking the symptoms will just mean the issue will remain until something seizes or goes bang!

    I think that Keith is right in some respects that the fault lies with the Turbo but not for good reasons.

    I've heard similar noises on turbos on BMs and Peugeots (they like eating turbos) and it sounds like the impeller shaft may have too much play in the bearings, causing the turbine blades to foul the body of the turbo under extreme high boost. When it does this you get the high pitched whining noise your experiencing. If you continue to replicate the symptoms, this could result in catastrophic turbo failure and your engine ingesting the small metal fragments. You won't need to be doing much more than 3000 rpm for that to happen.

    Can I ask, what grade engine oil do you use?
    Last edited by LeeT5; Sunday 4th November 2018 at 03:27.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: TTV SMF + 07 Clutch :: WG 5.0 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV + yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: Brembo Dot 5.1 :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: VolvoTech CFE OBD-V1 :: See garage for full mod list

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    When I say it didn't used to do it, I cant remember if it changed after replacing the original ECU with the RICA one. The car has been on/off the road numerous times in storage over the past five years, usually for the winter.

    Surely putting the original ECU back in (if its a high boost issue) will point towards that being the culprit.

    I still have some investigative work with the remaining boost pipes and intercooler.

    Its not a high pitched noise and doesn't sound like something bad is happening.

    I have a cheap analogue boost gauge so as stated likely not the most accurate but its always been on so I know what the standard ECU would boost to.

    Using semi synthetic 5w40 as the manual suggests. ECP stuff.

    T.
    08' V50 D5 R Design
    09' V70 2.0D R Design
    My investment: - 96' 850R estate manual

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    If you have ever heard a turbo vane touching the sides you would know without doubt what the noise is ....it is a terrible screech.

    The sound you are hearing is just the sound of the air being thrust through a narrowed opening from a large one at certain pressure you will get a howl.

    Just think about the Vulcan bomber in flight when at a certain airspeed it opens the throttle and you get the famous Vulcan Howl......same but different.

    Or what about the Brabham V16 race car... it is all the speed of air going through different shapes at a different force.

    I would put my money on your home made RIP kit?


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  11. #11
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    Quote Originally Posted by 960kg View Post
    If you have ever heard a turbo vane touching the sides you would know without doubt what the noise is ....it is a terrible screech.

    The sound you are hearing is just the sound of the air being thrust through a narrowed opening from a large one at certain pressure you will get a howl.

    Just think about the Vulcan bomber in flight when at a certain airspeed it opens the throttle and you get the famous Vulcan Howl......same but different.

    Or what about the Brabham V16 race car... it is all the speed of air going through different shapes at a different force.

    I would put my money on your home made RIP kit?
    Love the Vulcan..........

    Gonna try the standard ECU back in when I'm off at the end of the week and take from there. I think I'm being over picky with the car.

    Thanks

    T.
    08' V50 D5 R Design
    09' V70 2.0D R Design
    My investment: - 96' 850R estate manual

  12. #12
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    Quote Originally Posted by Timo. View Post
    Love the Vulcan..........

    Gonna try the standard ECU back in when I'm off at the end of the week and take from there. I think I'm being over picky with the car.

    Thanks

    T.
    If you just fit the standard ECU then clearly boost will be reduced (stock) so your not going to replicate the symptoms. What will that achieve? The leak, if it is one, will still be there.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: TTV SMF + 07 Clutch :: WG 5.0 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV + yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: Brembo Dot 5.1 :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: VolvoTech CFE OBD-V1 :: See garage for full mod list


 

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