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Type: Posts; User: CobraMarty

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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...
  3. 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...
  8. 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...
  14. 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'.
  15. N54: Like this- To illustrate how it could work. ...

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

  17. 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...
  18. N55: He's chasing a WOT accel sputtering issue after...

    He's chasing a WOT accel sputtering issue after install. ?plugs? gap?
    Maybe dyno after? IDK
  19. N55: Feedback on S55 MILVs install. "Overall the...

    Feedback on S55 MILVs install.

    "Overall the car feels more 'torquier' everywhere in RPM driving around town".
    Has sputtering on WOT acceleration, Have new NGK plugs to install.

    No tune after...
  20. Twin Screw Whipple vs. Twisted Rotor Roots TVS.

    Twin Screw Whipple vs. Twisted Rotor Roots TVS.
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    N54: Nice. So this is with stock head, stock...

    Nice.

    So this is with stock head, stock valves, stock cams and upgraded valve springs.

    What was the boost on 91 octane/598whp and 'more boost' on 109 octane/712whp?
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    General: Valve lift For other aftermarket available N54...

    Valve lift For other aftermarket available N54 cams-
    N54 CAT 239/263 stock- 211* @ 0.020 9.7mm valve lift
    N54 CAT 267/266- 216* @ 0.020 10.0mm valve lift
    N54 CAT 274/270- 220* @ 0.020 10.25mm...
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    General: And should add 2* duration. Cam lift 0.230" x...

    And should add 2* duration.

    Cam lift 0.230" x Rocker ratio 1.66 x 25.4mm/in
    stock - 0.230" x 1.66 x 25.4mm/in = 9.6977mm exhaust valve lift
    modified +0.19" cam lift - 0.249" x 1.66 x 25.4mm/in =...
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    General: Got the 4 cams back from their vacation out west...

    Got the 4 cams back from their vacation out west getting measured.
    Now to package up the used N52 and new 'Russian' N52 cams and send them to the cam grinder.

    So due to piston to valve clearance...
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    General: According to Schrick, their N54 low lift cam,...

    According to Schrick, their N54 low lift cam, 10.5mm lift, will work with stock pistons.

    According to ABRhouston, the Schrich N54 high lift cam, 11.0mm lift, requires pistons to be flycut.

    So...
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