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    N52: Just adding a pic from AA with headers to show...

    Just adding a pic from AA with headers to show the area Im working with.


    https://www.BoostAddict.com/images/imported/2019/06/Pic1-1.jpeg?v=1469731064
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    N52: Thanks for the tips. First SS log manifold...

    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...
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    N52: Ah, that partially explains things. I have...

    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...
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    N52: Or do I make each bank log manifold and start...

    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...
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    N52: Yeah the centrifugal supercharger has a poor...

    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....
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    N52: I found and ordered some more SS pieces. I found...

    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).
    ...
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    N52: So I got my SS cast elbows and Tees. It is...

    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...
  8. N54: What is the diameter of the port runners?

    What is the diameter of the port runners?
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    N52: Here is a couple of pictures I found that show...

    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...
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    N52: So when my favorite design tool CAD (Cardboard...

    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...
  11. Hopefully a LHD version for US market. High...

    Hopefully a LHD version for US market.

    High quality gel coat can come in multiple colors. White looks awesome, but Yellow, Red, Blue, Green, etc. Gel Coat has come a long ways, just look at the...
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    N52: Rear mounting the turbo instead of center...

    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...
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    N52: On the N52, the O2 sensors must read from all 3...

    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...
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    N52: Mounted turbo further forward on mounting holes....

    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.
    ...
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    N52: Oil jets, IDK if the N52 does or doesn't. At 6-8...

    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...
  16. N55: I so look forward to this plan and results.

    I so look forward to this plan and results.
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    N52: I could easier make a top mount turbo but I like...

    I could easier make a top mount turbo but I like the hidden, stealth appearing bottom mount turbo.
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    N52: Yeah I know, 'buy a used N54/55'. Cheap, proven...

    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...
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    N52: The N52 top upstream O2 sensors each have to read...

    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...
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    N52: So next idea is a cheap eBay T3 turbo, $100, and...

    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...
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    N52: 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...
  22. WOW, ESS is making their own Supercharger head...

    WOW, ESS is making their own Supercharger head unit. I guess they are tired of pay the 'Vortech Tax'.
  23. N54: Like this- To illustrate how it could work. ...

    Like this-
    To illustrate how it could work.
    Interesting concept
    Small gears, reliability?
    ...
  24. N54: (https://upload.wikimedia.org/wikipedia/commons/th...

  25. N54: Nicely done. No RPM on graph but we know that...

    Nicely done.
    No RPM on graph but we know that the curves cross over at 5250 RPM.
    I like when the TQ and HP peaks are nearly the same, that makes for a very streetable engine and power curve.
    I'm...
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