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    1. 01-04-2017 03:39 PM #1
      Howsit guys

      Just did a turbo conversion on my 3.2 vr6, thought i'd add some random info / observations for anyone that is interested.

      Setup:

      3.2 vr6 24v bmj
      9:1 cr / forged pistons and rods
      Chinese gt3582r, with a big twin scroll kkk 1.0 A/R exhaust housing, rebuilt and balanced. Running 0.5 bar boost.
      76mm DP and exhaust with 63mm stock resonator box chilling in the middle (havent had time to replace it yet) Lips sealed
      Ebay cast exhaust manifold
      38mm external wastegate
      bosch 044 fuel pump,rising rate adjustable fpr and surge tank (with return line)
      Stock 280cc injectors @ 4bar]
      Stock intake manifold
      Stock MAF
      DCPR8 spark plugs
      100% methonal injection for some extra safety for now.
      External EGT gauge.
      Everything else still stock, including stock ecu tune.

      Okay, starting from the beginning.....

      I basically bolted on a turbo kit that i made, all the above specs but with stock motor and stock c/r. Ran 0.5bar, car pulled insanely hard, ran around 14 degrees advance, 12.5 afr. Would have easily eaten a stock A45 AMG. Grin
      I was impatient, waited to long for head spacer plate to arrive, hence why i drove the car, excitement got the better of me lol Long story short, ended up cracking a piston on cylinder 1. No surprise there.

      I have since put in wossner pistons and forged rods.

      Did the first 500km break in, in stock NA mode.

      The car is now boosting again, exact same setup as before but with lower compression ratio.
      The drivability of the car is fine, besides for part throttle boosting obviously, thats sometimes a bit jerky.
      The logs are rather interesting too.

      Car makes 0.5 bar boost just under 4k rpm in 3rd, barely any boost in 1st gear, but when its in boost it breathes so nicely Grin So im really happy with the turbo choice!
      The car is running between 18 and 24 degrees advance with low timing pull with 100% methonal injection.
      Hits maf limit on stock maf @ 0.5bar, just above 290 g/s.
      So far only running on the LAMFA map, requesting 0.899 lambda and its meeting the requested fueling under load. Part throttle fueling obviously crap. Injection timing sitting around 14 ms.
      EGT's hit 920 degrees celcius with a 5th gear pull to redline.

      Running the car without methonal injection is a different story. (in high gear mainly, >= 4th gear)
      EGT's still dont go above 920 degrees, but it obviously starts requesting other fueling strategies, and dumping fuel.
      Timing advance is hard to say as it jumps around a lot, i would say around 18 degrees but with scary 8.5 pull.

      Busy building the intake manifold now, as soon as its done i will pop the 550cc injectors in and begin the mapping.
      Will try give as much info as i can regarding mistakes and observations and tips for anyone that might need it.

      Loving the car, pulls really hard!!! Grin
      Will be doing a base dyno asap!

      Anyways vids below:

      Stock motor, without wmi.
      https://www.youtube.com/watch?v=twyCjSYNutU

      Built motor, 100% methonal injection... 0 to 170 km/h
      https://www.youtube.com/watch?v=cDoyOHwmAq0

      Built motor, 100% methonal injection...4th gear
      https://www.youtube.com/watch?v=4q2GzJk6UpA

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    3. Junior Member gerronj's Avatar
      Join Date
      Dec 14th, 2016
      Location
      woodbridge, va
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      25
      Cars
      MK2 Jetta GLI 86' 930T 337 GTI 06' GTI B5 S4
      01-17-2017 02:04 PM #2
      Car pulls very nice!
      I have completed 2 of these particular builds in the past. Let me know if you need anything (spare parts, advice, or any trouble you run into with tuning the car.) cheers


      Sent from my iPhone using Tapatalk
      Young Eurospeed

    4. Semi-n00b
      Join Date
      Feb 23rd, 2017
      Location
      Windhoek, Namibia
      Posts
      17
      Cars
      2005 VW Golf iv R32
      03-17-2017 01:18 PM #3
      Nice build
      Car 🚗 pulls like a train

      Sent from my D6603 using Tapatalk

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    6. Member V-dubbulyuh's Avatar
      Join Date
      Nov 13th, 2005
      Posts
      4,911
      Cars
      Mk3 VRT, Mk4 VRT, Mk4 VRT, A3 VR QT, B6 3.6 4Motion, B5 1.8BT, B5 Avant QT VRT
      04-08-2017 10:38 AM #4
      Show some engine bay/build pics.

      Actually impressed it's doing so well on stock fuel management.
      "OP sounds like a MKIV guy"

    7. 01-11-2019 12:32 PM #5
      just starting to look into option to put urbo on 2006 A3 3.2 Quattro DSG.
      Does the stock ecu (not sure what make/model) allow for boost control?

    8. Member V-dubbulyuh's Avatar
      Join Date
      Nov 13th, 2005
      Posts
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      Cars
      Mk3 VRT, Mk4 VRT, Mk4 VRT, A3 VR QT, B6 3.6 4Motion, B5 1.8BT, B5 Avant QT VRT
      01-11-2019 01:13 PM #6
      Currently no, think stock NA car, no map sensor & N75/similar. Expectation is mechanically control boost.
      "OP sounds like a MKIV guy"

    9. n00b
      Join Date
      Mar 23rd, 2019
      Location
      Finland
      Posts
      3
      Cars
      Porsche Cayenne 3.2 VR6 x 2
      03-23-2019 11:02 AM #7
      So, it looks like you can go pretty stock if 0.5 bar is enough. I'm doing similar project and i'm interested to know how did you resolve O2 sensor issue? I mean, did you just connect them to same pipe or do you have some other setup? Wouldn't that cause severe fuel trim drifting?

      I mean, Audi too has bank1 and bank2 separated and two catalytic converters, right? Porsche has 4 O2 sensors, two for each bank, two of them being wideband.

    10. 04-17-2019 05:40 PM #8
      Quote Originally Posted by larppaxyz View Post
      So, it looks like you can go pretty stock if 0.5 bar is enough. I'm doing similar project and i'm interested to know how did you resolve O2 sensor issue? I mean, did you just connect them to same pipe or do you have some other setup? Wouldn't that cause severe fuel trim drifting?

      I mean, Audi too has bank1 and bank2 separated and two catalytic converters, right? Porsche has 4 O2 sensors, two for each bank, two of them being wideband.
      both lambda must be like this one at cyl1 other cyl6

      https://ibb.co/7QXTWq9

    11. n00b
      Join Date
      Mar 23rd, 2019
      Location
      Finland
      Posts
      3
      Cars
      Porsche Cayenne 3.2 VR6 x 2
      05-11-2019 03:34 AM #9
      Quote Originally Posted by MOOMO View Post
      both lambda must be like this one at cyl1 other cyl6

      https://ibb.co/7QXTWq9
      Interesting. I actually already fitted them like they are on HPA manifold. What is the difference? My fuel trims seem just fine now. Does it have something to do with cold and hot cylinders?

      http://uli.ulicode.fi/cayenne_exhaust.jpg

      And if anyone is interested. I currently have stock everything (ECU, engine etc, intake) expect for turbo exhaust manifold and straight downpipe (secondary cat still installed). I pushed around 300g/s of air thru engine at 0.7bar. 0.5-0.6bar feels fine. Pistons didn't melt yet atleast. Tried 50% ethanol, didn't work, very jerky so i'm running 98 octane. Oh and did some tricks with vacuum hoses too, looks like boost really messes up variable intake system.
      Last edited by larppaxyz; 05-11-2019 at 03:43 AM.

    12. 05-21-2019 11:53 AM #10
      Oh my, this makes me want to strap a windmill to my exhaust

    13. n00b
      Join Date
      Mar 23rd, 2019
      Location
      Finland
      Posts
      3
      Cars
      Porsche Cayenne 3.2 VR6 x 2
      05-22-2019 01:25 PM #11
      Update : I melted my piston(s).

      After some hard pulls (WOT from 50km/h -> 130km/h), it started to push exhaust from oil cap, but is not burning oil.

      Must be because 1. Had lazy o2 sensor on bank 2 (i could see it from data) 2. knock sensor on that same bank didn't work properly 3. It was pushing 0.7bars.
      Reasons 1 and 2 basically removed all protection for lean condition...

      Game over. Lessons learned : 1. Make sure engine is in top tick before fitting turbo 2. compression must be lowered 3. ethanol should be used.

      https://youtu.be/qPbmMaGpyrA its in finnish but has english subtitles.

      Turbo kit is for sale! ..
      Last edited by larppaxyz; 05-22-2019 at 03:26 PM.

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