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  1. #1
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    335d turbocharger specs?

    Does anyone know the specifications of the small and large turbos on the 335d? I'm looking for the compressor and turbine wheel diameters and shaft diameters, as well as the A/R of the turbine housings. Also, are these journal or ball bearing units?

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    I don't think anyone knows. It sure would be nice though and what would be even nicer is if we could upgrade them...
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    The large turbo seems similar in size to a turbo with a 58mm-60mm compressor wheel. Does anyone know the brand? I thought they were Borg Warner, but I'm not sure.

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    1 out of 1 members liked this post. Reputation: Yes | No
    I just found a reference to the turbo as being a k26-2871. If that's anything like a Garrett GT2871, it has a 53.1mm inducer (71mm exducer) compressor wheel. Not nearly as big as I had hoped. The 335d engine doesn't rev very high, so maybe it's sufficient for all but the extreme cases.

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    Click here to enlarge Originally Posted by Black Metal Click here to enlarge
    I just found a reference to the turbo as being a k26-2871. If that's anything like a Garrett GT2871, it has a 53.1mm inducer (71mm exducer) compressor wheel. Not nearly as big as I had hoped. The 335d engine doesn't rev very high, so maybe it's sufficient for all but the extreme cases.
    The K26 comes in ball bearing and non-ball bearing configurations and has been used a lot of cars apparently. Wish we could definitively know the specs as used in the 335d.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    if you plan to swap the internals ther is already a company doing that. That can save you the work for research and testing.

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    Click here to enlarge Originally Posted by cisi Click here to enlarge
    if you plan to swap the internals ther is already a company doing that. That can save you the work for research and testing.
    Who is it?
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    duh! dont know george!

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    I'm pretty sure the 335d uses a twin turbo sequential setup with two different sized turbos. This is unlike the twin setup in the n54 which uses two parallel turbos of the same size.
    Eppur si muove.

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    Does the small turbo add any flow at high rpm, or is it bypassed at some load point?

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    Click here to enlarge Originally Posted by Black Metal Click here to enlarge
    Does the small turbo add any flow at high rpm, or is it bypassed at some load point?
    No idea, I have an N54.
    Eppur si muove.

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    Click here to enlarge Originally Posted by cisi Click here to enlarge
    if you plan to swap the internals ther is already a company doing that. That can save you the work for research and testing.
    Yes! Do you know the name of the company?

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    bypassed
    it is a true two turbo set up.

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    1 out of 1 members liked this post. Reputation: Yes | No
    if you search high and low you can find the specs from borg warner on the turbos. Borg warner K26 and KP39.

    There is info on the k26 at this link, not sure if it will get you everything you need or not turbodaves.com/uploads/BWTS_2013.pdf

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    1 out of 1 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by Black Metal Click here to enlarge
    Yes! Do you know the name of the company?
    www.hpturbo.pt

    Click here to enlarge

    My turbos are from them and i'm very happy with it. They are ratted to +3bar which is more than enough to break the 500hp mark. Click here to enlarge
    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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    Seems like there are several options in Europe, but none in North America. Makes sense, I bet the US has about 1% of the number of diesels that Europe has.

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    Click here to enlarge Originally Posted by Tiago Click here to enlarge
    www.hpturbo.pt

    Click here to enlarge

    My turbos are from them and i'm very happy with it. They are ratted to +3bar which is more than enough to break the 500hp mark. Click here to enlarge
    What did the set cost? I didn't see any prices on the website.

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    No magic here. They are Borg / KKK K26 for the bigger turbo. It can easily be upgraded, highly doubt it is BB. Would like to take a look at one. The US market is small, but I assume the Euro market would be pretty large.

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    Click here to enlarge Originally Posted by Black Metal Click here to enlarge
    What did the set cost? I didn't see any prices on the website.
    I believe that it is €1500 + core. The upgrade wheels compressor come from a US manufacturer company...
    Sent them a email. Ask for Nuno and tell him that i sent you. He is a very nice guy.
    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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    Click here to enlarge Originally Posted by VargasTurboTech Click here to enlarge
    No magic here. They are Borg / KKK K26 for the bigger turbo. It can easily be upgraded, highly doubt it is BB. Would like to take a look at one. The US market is small, but I assume the Euro market would be pretty large.
    US market need to get into the european diesel world. I got a 162.5% hp increase over stock with just exhaust, ic, hybrid turbos and tune. All the rest remain stock and even at my stage, the stock fuel system has more room for more boost.
    My results was achieved on a MAHA LPS 3000 and higher gear. On a dynojet the number would be alot higher. I'm runing this stage for about one year, 15000 miles and several top speed runs +190mph...
    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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    1 out of 1 members liked this post. Reputation: Yes | No
    Another car using the same hybrid turbos from www.HPTurbo.pt

    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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    Thats wicked awesome!! Click here to enlarge

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    So their hybrid turbos are just a stage 1 style with a bigger compressor or they just throw a billet compressor in the same size as stock?

  25. #25
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    Bigger compressor.
    BMW E61 535d: 442hp and 625lbs-ft + some good stuff Click here to enlarge
    BMW E46 M3: ESS VT2-550 Supercharger Kit + lots of good stuff Click here to enlarge

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