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Thread: 850 T5 deletes

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    850 T5 deletes

    Hi guys, whilst im still fixing the Volvo I saw a massive carbon canister. I thought ill remove that, tidy a bit of pipework up, then I thought the ECU might throw a wobbly.
    What Deletes are there I can do to this car, what does it actually need.
    I would de-cat
    Carbon canister
    boost solenoid (to simplify)
    EGR (if it has one)
    Mark

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    Oh and simplify the breather system to atmosphere.
    Would doing any of this have negative effects on the running of the car?
    Thanks
    Mark

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    The standard system is very efficient and not a common failing point so better left alone

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    Well this car is 20 years old now, and I can already see hoses perishing, my breather recirc has a nice big leak. So much so that its can smoke on cranking.
    Id just like to tidy and simplify the pipes and squeeze as much efficiency out of it as possible without compromising the electronic side.

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    a 19t just isn't laggy enough
    p fandango's Avatar
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    I binned the carbon canistor years ago & had no issues, if you remove the bcs it'll throw a cell light

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    Still more fettling needed,
    will it never end?
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    There's no EGR to worry about on U.K. spec cars.

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    PCV kits cost £100 and that's genuine, plus £10 worth of silicone hose for the boost pipes and job done. Why bodge it would you can do the job properly and know it will actually work afterwards.

    There's no good reason to remove the BCS, MBC's make for very jerky power delivery and the use of one could end up wrecking your engine. A new one costs £60-70.

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    Thanks guys.
    No EGR, that's good.
    I will remove the carbon canister then, that frees up some pipework.
    PVC I would like to remove to stop spent gasses getting into the turbo. The cleaner the air the better. Also its going to eliminate pipework and connections.
    Ive just had a look on google, does it go into an oil swirl pot first?

    Theres a lot of pipework with the BCS aswell that id like to make sense of, it seems like it doesn't need it. At the moment, does it give the power gradually. Are you saying that fitting a MBC that boost will just thump in with no gradient?
    Mark

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    a 19t just isn't laggy enough
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    Quote Originally Posted by Sparkysparks View Post
    Thanks guys.
    No EGR, that's good.
    I will remove the carbon canister then, that frees up some pipework.
    PVC I would like to remove to stop spent gasses getting into the turbo. The cleaner the air the better. Also its going to eliminate pipework and connections.
    Ive just had a look on google, does it go into an oil swirl pot first?

    Theres a lot of pipework with the BCS aswell that id like to make sense of, it seems like it doesn't need it. At the moment, does it give the power gradually. Are you saying that fitting a MBC that boost will just thump in with no gradient?
    Mark
    The wiring for the pcv valve is purely for the heating element so can be binned without putting a light on. I've removed the pcv tank as well & have everything breathing to a catch tank, which then goes to atmosphere

    As for the mbc, I love them & how aggressive they are. You can use an electric boost controller which would replace most of the pipe work, but as said if you remove the bcs altogether you'll get a warning light on (best unplumb it, but leave it wiring in)

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    There's always going to be different opinions on this, personally I believe MBC's are bad news, what you get is uncontrolled boost and you loose a safety system that is designed to protect the engine.

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    Ok, ill block the drain hole into the block, and vent the rocker cover and block breathers to atmosphere under the car then block the holes in the intake hose.

    Ill leave the boost controller plugged in but capped and use a MBC for full power. This will take a lot of pipework out and leve me with 2 small pipes.
    hat about a decat. I havnt been under the car yet, but I assume being Volvo it will have more than 1 o2 sensor, can I just put them in the decat pipework?

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    "There's always going to be different opinions on this, personally I believe MBC's are bad news, what you get is uncontrolled boost and you loose a safety system that is designed to protect the engine."

    If its locked off at a nice level though it should be fine. You would lose a safety system, but that solenoid looks like it'll just restrict at a certain level.

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    Quote Originally Posted by Sparkysparks View Post
    Ok, ill block the drain hole into the block, and vent the rocker cover and block breathers to atmosphere under the car then block the holes in the intake hose.

    Ill leave the boost controller plugged in but capped and use a MBC for full power. This will take a lot of pipework out and leve me with 2 small pipes.
    hat about a decat. I havnt been under the car yet, but I assume being Volvo it will have more than 1 o2 sensor, can I just put them in the decat pipework?
    I would plumb the block and head breather pipes in to a catch tank otherwise you will be forever cleaning oil off of the engine. Also venting crankcase vapour to atmosphere is a MOT failure.

    Just to remind you what mbc stands for

    M - may
    B - bend
    C - conrods

    If you want to make good boost get it mapped !!!!!

    850's only have 1 O2 sensor and it is before the cat so running a decat doesn't coz a problem just at MOT times as without a cat it's a MOT failure.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Haha, I keep seeing posts about bending conrods. Im starting to worry now.

    Cat will be on for the MOT, as will the PVC system. I didn't realise it was an MOT failure. Ive done that to all my cars and never had issues at MOT time.
    I will be routing pipework for them down under the car though.
    Its got a Rica tune, I know its not a full remap but im unsure of the boost implications of it, whether it makes better use of the fuelling at the same boost or whether it upps the boost aswell.

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    Quote Originally Posted by Sparkysparks View Post
    Haha, I keep seeing posts about bending conrods. Im starting to worry now.
    I ran one for years with no issues, as long as your sensible you'll be fine. You will have to be careful using one with a rica as the map will have removed the maf/boost limit

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    Sensible with boost. Haha. So realistically how much boost is a safe limit with the mods that I have? Is 1.5 bar achievable?

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    its not a question of how much boost but when its delivered thats why your better off with a map

  20. #18
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    Still more fettling needed,
    will it never end?
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    The first thing to do would be fit a proper boost guage that actually tells you how much boost you're making, makes it easier to monitor it.

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    This is going to end in tears


    T35, 556Nm/410lbft & 361BHP/317WHP

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    Ofcourse. I wont do anything till I have a boost gauge.
    The thing is. Its a turbo car. I want full power when boost hits otherwise I dont see the point.
    I understand it can break things. I'll have to do these things gradually


 

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