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Thread: Turbocharger

  1. #26
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    Have you looked into building a manifold using the stock manifolds, cutting off below the merge, plum in a t3 flange, or relocating the ac over to the left side? It’s a lot of work with so much against this, but, the other alternative is a rear mount. This is another option, has had great success, and can work without moving anything in the motor. I was contemplating putting one in place of the rear muffler, I happen to find a donor 535 car that I’m working to put in place of the n52.

  2. #27
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    I have a set of cut off stock manifolds. Not really right position of merge outlet.
    Relocate A/C compressor, at that point, just take it off. Great for a track car.
    Rear mount has their own set of issues and problems.

    Top mount would be easier, but still need to fabricate the exhaust manifold. Could use N54 top mount exhaust manifold.

    A simple log style exhaust manifold would be easier, but need both banks separate for the O2 sensors.
    Would work if Turbo was between cylinders 3 and 4, separate banks, but that places the turbo too far forward.
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
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  3. #28
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    So for the TUNE-

    -Use S65 injectors
    -tune for turbo
    -MAF delete, use EURO temp sensor
    -forward Cat delete
    -MILVs
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  4. #29
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    On the question of the ESS centrifugal supercharger Stage 2 kit and power and boost curve.
    Here is their dyno graph.
    Boost curve is rpm/1000 - 1.5 = boost

    Sure it is very proportional to rpm and linear, but a turbo boost curve would be way more favorable and make 5-7 psi at the lower rpm levels.

    And every psi of boost adds about +14*F. Add that to ambient + actual intake air temp and it is around 200*F.
    No intercooling!! This is way too high.
    Turbo, even with stock N54 IC, will be low 100*F.
    Attached Images Attached Images  
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  5. #30
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    So far here's the collection of parts I've gathered.
    The SCH 40 and SCH 10 are dimensional the same. That's weird. Both are SS304.
    The SCH 40 are dull looking.
    The SCH 10 are more shinny and surface is textured, like anil'ed.

    Click here to enlarge
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  6. #31
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    So far here's the collection of parts I've gathered.
    The SCH 40 and SCH 10 are dimensional the same. That's weird. Both are SS304.
    The SCH 40 are dull looking.
    The SCH 10 are more shinny and surface is textured, like anil'ed.

    Click here to enlarge
    SCH 10 should be thinner walled with same OD but bigger ID than SCH 40. Basically you are just getting a much heavier pipe with SCH 40, IMO it obviously would works great but is also quite a bit overkill if wanting to minimize fab efforts. SCH 10 is nearly 3mm wall thickness which is very robust, SCH 40 nearly 4mm which is extremely heavy. For any sort of production work we'd 100% recommend using only SCH 10, but if a one-off job the SCH 40 would be fine as well.

    PS. If anyone else wants to stock up on a bunch of these Weld El's for cheap, let us know as we have a bunch of it taking up space.

  7. #32
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    Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
    SCH 10 should be thinner walled with same OD but bigger ID than SCH 40. Basically you are just getting a much heavier pipe with SCH 40, IMO it obviously would works great but is also quite a bit overkill if wanting to minimize fab efforts. SCH 10 is nearly 3mm wall thickness which is very robust, SCH 40 nearly 4mm which is extremely heavy. For any sort of production work we'd 100% recommend using only SCH 10, but if a one-off job the SCH 40 would be fine as well.

    PS. If anyone else wants to stock up on a bunch of these Weld El's for cheap, let us know as we have a bunch of it taking up space.
    Thanks.

    What size and how many do you have? El's and Tee's? Bulk discount?
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  8. #33
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Yeah the centrifugal supercharger has a poor boost curve.
    It basically follows the rpm. RPM/1000 -1 = boost.
    So 1psi at 2000 and 5psi at 6000 and compared to a turbo, it sucks up 25-30hp to spin. It maxes about 6psi and no intercooler solution besides WMI. And $$$$.
    I wouldn't call it poor. It has advantages. Easier on the driveline and easy to tune for.

    Plus, tons of power up top.

  9. #34
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    It can be acceptable in a 6M, but for an auto which shifts early, I rarely go over 4000, and only occasionally go over 5000.
    Big difference between 6M and Auto on the used power band.

    And at the same 6psi, the turbo will always make more power due to no parasitic loss of turning the centrifugal SC and more importantly being intercooled.
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  10. #35
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    Spa has the cast manifold with provisions for the waste gate, have you looked into this. Although it’s questionable if the mounting holes will line up, as it looks like it’s primary purpose is for the n54, but claim it’s universal among the n engines.

  11. #36
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    That's like what I really wanted to use but it places the turbo near the middle. The compressor housing and inlet will not clear the A/C compressor and coolant tube.
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  12. #37
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    SPA N54 Single Turbo exhaust manifold, bottom mount.
    See where the turbo would be centered mounted and would interfere with the coolant pipe and A/C compressor.
    If it was bottom rear mount, it would be ideal.
    Attached Images Attached Images  
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  13. #38
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    I was going to link it,lol. I don’t know how, and what’s allowed anymore. I know on the e60, the mount is forward unlike the e90, I was looking into doing the same thing, but there is so many cons in a e60. The n54 is build completed before install. I was surprised how close the N55s manifold was, and that the oem pipe is utilized. Did you consider using all this and just relocated the ac?

  14. #39
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    2 out of 2 members liked this post. Yes Reputation No
    Finally got all the pieces I need. Sizes are all over the place from description. Had to buy a mix and measure myself to get what I want.
    Basically building a stepped log exhaust turbo manifold.

    First cylinder/elbow is 42mm OD/1.42" ID
    Then T 45mm OD/1.50" ID
    Then T 48mm OD/1.61" ID
    Then elbow 57mm OD/ 1.96mm
    Final T to turbo flange 57mm OD/1.96" ID

    Separate bank 1 and bank 2.
    O2 sensors will go in each bank and have same downstream O2 sensors.

    Now to cut and trim pieces and weld it up.

    Click here to enlarge

    Click here to enlarge
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  15. #40
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    I cut the SS pieces with my 14" chop saw as best as I could eyeballing it.
    Ignore my 'welding' tape, but this is the
    'N52 Turbo Exhaust Manifold'.
    I'll spot weld it and install on my test engine on the stand and see what needs to be tweaked.

    Bottom view-
    Click here to enlarge

    Top view-
    Click here to enlarge
    MILVS- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVS.com
    Coming soon: +1mm lift Exhaust cam for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  16. #41
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    Any updates/progress?
    Three sets of brand new 991.2 3.0 headers for sale: Kline, Fabspeed, and Vektor Ceramic Coated

    IPD plenum for Porsche 991.2 3.0 for sale: $650

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