Close

Results 1 to 25 of 25

Thread: Turbocharger

  1. #1
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5


    3 out of 3 members liked this post. Yes Reputation No

    Turbocharger

    So I have a N52 on the stand and was thinking about another mod.

    My original hope was that a stock N55 turbofold and turbocharger would fit. Bolt pattern is the same. Problem is the turbo is in the middle and would hit the A/C compressor, block the block coolant line and the compressor hits the mounting block for the a/c when a/c is removed. I got it bolted on with a 1" spacer. Stock catted downpipe fit.
    Basically a fail, but damn they are cheap and plentiful.

    If you had a track only car and lose the a/c and cut off the a/c mounting block off the block and was able to snake in the coolant line, the N55 turbofold and turbocharger would fit and work.

    Click here to enlarge

    Click here to enlarge

    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 N52 and N55

  2. #2
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    So next idea is a cheap eBay T3 turbo, $100, and a tubular log manifold. I got a cheap manifold off eBay for e46, $50, to mock up and get better idea for fit. A couple of holes lined up to mount the manifold.

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    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 N52 and N55

  3. #3
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    The N52 top upstream O2 sensors each have to read all the cylinders of each bank. So fabricated exhaust manifold has to be 2- 3into1 feeding the turbo flange. It will have to be raised from pictures mock up to clear the motor mount. Still have to mount the WG actuator on the turbo, 90* outlet welded on, downpipe to stock exhaust location, will lose the upstream cat.
    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 N52 and N55

  4. #4
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    Yeah I know, 'buy a used N54/55'. Cheap, proven power, blah blah blah.
    That's not the point of this. Anyone can buy a used car, few can build a turbocharged N52.

    Only looking for low boost 6-10psi. This will still add 50% more power.
    Stock N52 makes 230hp/190rwhp. With a few mods 275hp/230rwhp. Turbocharged adding 50% nets 350hp/300+rwhp. That is the goal. Reliable power.

    Not building a HP queen but it will surprise, impress, keep up or a stock N54/55 owner.

    Keeping up or even beating a stock N54/55 owner in 'just a 328' is priceless.
    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 N52 and N55

  5. #5
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    I could easier make a top mount turbo but I like the hidden, stealth appearing bottom mount turbo.
    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 N52 and N55

  6. #6
    Join Date
    May 2011
    Posts
    822
    Rep Points
    462.3
    Mentioned
    4 Post(s)
    Rep Power
    5


    Yes Reputation No
    So N52 have oil jets cooling the bottom of the pistons?

    BMW uses dual scroll single turbo for a reason.

  7. #7
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    Oil jets, IDK if the N52 does or doesn't. At 6-8 pounds of boost does it really matter.

    Dual scroll, they supposedly spools faster. Great on a big turbo. Again does it really matter at my target power projections.
    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 N52 and N55

  8. #8
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    Mounted turbo further forward on mounting holes. Barely too far. Really need exhaust inlet under cylinder #5.

    Also placed coolant pipe in place.

    And need to locate turbo about 2-3" higher.

    Ordered some SS elbows and tees to mock up a tubular exhaust manifold.

    Click here to enlarge

    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 N52 and N55

  9. #9
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    On the N52, the O2 sensors must read from all 3 cylinders of bank 1 or 2. If you place the O2 sensor in just one pipe then it only senses 1 cylinder of a bank, the ecu will know this and throw a CEL.

    BMW and the ecu must be very fast and smart. I'm sure by measuring all 3 cylinder in a bank, it can tell how each cylinder is working. It can richen 1 cylinder and measure the O2 reading to see if it changes. It can do this for each cylinder in a few rotations/ms.
    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 N52 and N55

  10. #10
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    138,074
    Rep Points
    41,202.3
    Mentioned
    2428 Post(s)
    Rep Power
    413


    Yes Reputation No
    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Yeah I know, 'buy a used N54/55'. Cheap, proven power, blah blah blah.
    That's not the point of this. Anyone can buy a used car, few can build a turbocharged N52.
    Respect.

    So no AC solution eh?

  11. #11
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    138,074
    Rep Points
    41,202.3
    Mentioned
    2428 Post(s)
    Rep Power
    413


    Yes Reputation No
    This project is the cool kind of thing you like to see guys on the forum do.

    There is more to this than chasing dynos.

    Love this thread.

  12. #12
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    So no AC solution eh?
    Rear mounting the turbo instead of center mounting like the N55 Turbofold will allow for the AC compressor to remain in place and functional. Yay!!
    The AC compressor resides in front of the block coolant pipe. I'll have to dig out the used AC compressor I got and mount it on the block.
    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 N52 and N55

  13. #13
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    So when my favorite design tool CAD (Cardboard Aided Design) doesn't work, I used my next favorite design tool, PAD or PPAD (Pipe or Plastic Pipe Aided Design).

    After a quick trip to Lowe's and picking up some pieces, about an hour of fitting, cutting and grinding, I built my prototype 'N52 rear bottom mount Turbo tubular exhaust manifold'.

    1.5" primary tubes with each bank feeding into stepped up 1.75" tubing. Outlet will have a T3 flange.

    O2 sensor locations are marked on top of manifold.

    A shout out and thanks to RB for their exhaust manifold flange.

    Now waiting on the SS 304 butt weld pieces to arrive. The 90* elbows are a nice smooth bend, not Sharp like the plastic pieces. And then tac weld them all together and test fit and then to my welder/fabrcator for final build.

    Click here to enlarge

    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 N52 and N55

  14. #14
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    2 out of 2 members liked this post. Yes Reputation No
    Here is a couple of pictures I found that show the AC compressor and the engine coolant pipe.

    You can see how they will in the way of a mid mounted, between cylinders 3 and 4, turbine like the N55 and how the compressor housing would interfere with the coolant pipe and AC compressor.

    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 N52 and N55

  15. #15
    Join Date
    Mar 2011
    Location
    FR
    Posts
    143
    Rep Points
    310.5
    Mentioned
    0 Post(s)
    Rep Power
    4


    Yes Reputation No
    following Click here to enlarge would be a nice addition to my ride but RHD will get me caught.

  16. #16
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    So I got my SS cast elbows and Tees.
    It is always hard to know exactly what their measurements are without actually having them in your hand.
    I bought 42mm OD and 48mm OD pieces.

    The 42mm OD are actually (34mm)1.37-1.45"(1 3/8") ID and the 48mm are (41.5mm)1.61-1.65"(1 5/8") ID.

    I really wanted 1.5" ID for the runners.
    The Turbo manifold will basically be a log style, 2 separate, 3into1 for each bank. Only the end, 1st, will be 1 cylinder worth of exhaust gas and then will collect 2nd cylinder and then 3rd. So I will use the bigger 1 5/8" ID pieces for the log manifold. I could use the 1 3/8" ID for the 1st cylinder and then 'step up' to 1 5/8" for the 2nd and 3rd cylinder, but I like symmetry and I doubt the 1st short 90* 1 3/8' vs 1 5/8" will make any difference.

    Each bank, 3into1, will then flow into 57mm OD(?ID, 1 3/4", just ordered) pieces and then into the turbo.
    So there will be a 'step up' in the tubing size for each bank.
    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 N52 and N55

  17. #17
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    I found and ordered some more SS pieces. I found 45mm OD parts which should be about 1 1/2" ID.

    So now I have 42mm(1 3/8" ID), 45mm OD (1 1/2" ID), 48mm(1 5/8" ID) and 57mm(?1 7/8'-2.0" ID).

    Taken from another thread-
    Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
    Good question. The manifold runners are right about the size of OEM, ~34.25mm. There is absolutely no reason to increase the size of primary runners, an overly large manifold runner (mismatched to the cylinder head port) only helps create a slug for a turbo in response. Or in short there is no restriction in the runners of the manifolds of the N54 engine, so run for the hills if your vendor of choice is trying to sell you on N54 manifold runners being a restriction point (NOTE: The collector size alongside manifold to housing matching is another story altogether).
    type of vendor). Having a full CNC shop certainly has its perks.
    Rob
    34.25mm is just a shade under 1 3/8" for each runner.

    So for each bank, log manifold 3into1, I could start with 1 3/8", into 1 1/2", into 1 5/8", into 1 7/8" to turbo.
    With each added cylinder, the tubing size would 'step up' to help with the additional exhaust flow from the next cylinder in sequence.
    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 N52 and N55

  18. #18
    Join Date
    Jul 2012
    Location
    Boston, MA
    Posts
    3,167
    Rep Points
    2,414.3
    Mentioned
    74 Post(s)
    Rep Power
    25


    Yes Reputation No
    oh neat sub'd.

    I am going to guess this will still cost more than the delta between a 328 and a 335i and the N54 tune only will walk it but this is very cool.

    Be great if the N52 guys had an affordable turbo they could upgrade to. The SC solution is weak sauce.

  19. #19
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    1 out of 1 members liked this post. Yes Reputation No
    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 $$$$.

    Turbo is much cheaper, better boost curve, 5-8psi from 2000rpm, add S65 injectors, tune, N54 FMIC, piping done. No parasidic power zapping.
    Install might be a bit more involved than the supercharger, but basically a 'header install' and without having to pay and install headers like on the supercharger kit
    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 N52 and N55

  20. #20
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge

    Taken from another thread-
    34.25mm is just a shade under 1 3/8" for each runner.

    So for each bank, log manifold 3into1, I could start with 1 3/8", into 1 1/2", into 1 5/8", into 1 7/8" to turbo.
    With each added cylinder, the tubing size would 'step up' to help with the additional exhaust flow from the next cylinder in sequence.
    Or do I make each bank log manifold and start with 1 1/2 into 1 5/8 into 1 3/4 or 7/8 and then into 2 inches and into the turbo?

    I need to measure the stock N52 exhaust manifold. I want to make each bank log free flowing but not too big as to lose velocity.
    I will also measure the runners in the N55 Turbofold as stock that has about the same power or close to the power I am hoping for.

    Pictures next week.
    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 N52 and N55

  21. #21
    Join Date
    Jun 2010
    Location
    St. Louis, MO USA
    Posts
    1,635
    Rep Points
    3,355.0
    Mentioned
    44 Post(s)
    Rep Power
    34


    Yes Reputation No
    For years now, on custom built applications using our head flanges for N54 anyway, we typically recommend the Schedule 10 1.25" Weld Els. Although a bit bigger than OEM at about 36mm, these are about the closest you can find to a perfect fit IMO while retaining a lot of strength due to wall thickness.

  22. #22
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    Ah, that partially explains things.
    I have been collecting Schedule 40 Weld Els and Tees. They have and thicker wall and different ID.

    The Sch 10 1.25 Els with 36mm ID is just over 1.41/1 3/8 inches.

    So I guess build it with the Sch40 that I have. As short as the runners will be, I doubt if less that 1 inch of tubing either 1.375 or 1.41 or even 1.50 will make much difference.


    I am using your N54 head flange. Great piece.
    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 N52 and N55

  23. #23
    Join Date
    Jun 2010
    Location
    St. Louis, MO USA
    Posts
    1,635
    Rep Points
    3,355.0
    Mentioned
    44 Post(s)
    Rep Power
    34


    Yes Reputation No
    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Ah, that partially explains things.
    I have been collecting Schedule 40 Weld Els and Tees. They have and thicker wall and different ID.

    The Sch 10 1.25 Els with 36mm ID is just over 1.41/1 3/8 inches.

    So I guess build it with the Sch40 that I have. As short as the runners will be, I doubt if less that 1 inch of tubing either 1.375 or 1.41 or even 1.50 will make much difference.


    I am using your N54 head flange. Great piece.
    Yeah the schedule 40 is a bit overkill. Nothing wrong with it, just very thick walls, and thus harder to work with. For this application Schedule 10 seems to fit the bill nicely.

    Rob

  24. #24
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    Thanks for the tips.

    First SS log manifold build. Learning lots. This first one will be a learning curve. Heavy, overbuilt, strong.
    Next time I will look for Sch10 pieces.

    Ebay has relatively cheap Sch40 SS Els and Tees and easy ordering.
    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 N52 and N55

  25. #25
    Join Date
    Jun 2015
    Location
    www.BimmerMILVs.com
    Posts
    265
    Rep Points
    423.3
    Mentioned
    7 Post(s)
    Rep Power
    5



    Yes Reputation No
    Just adding a pic from AA with headers to show the area Im working with.


    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 N52 and N55

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •