FB16 DIT - Boost Pressure - UK

Discussion in 'Subaru Levorg Engine' started by ScottyLevorg, Jun 2016.

?

Typical Max Boost levels between 3500rpm and 5500rpm

  1. 0.7

    1 vote(s)
    9.1%
  2. 0.8

    6 vote(s)
    54.5%
  3. 0.9

    2 vote(s)
    18.2%
  4. 1.0

    2 vote(s)
    18.2%
  5. 1.1 !!!!!

    0 vote(s)
    0.0%
  1. ScottyLevorg

    ScottyLevorg New Member

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    Hi Folks,

    I've got a 2015 Levorg 1.6 GT , i've noticed that my car only boosts to 0.7 or 0.8 Bar boost, I'm totally convinced the vehicle I test drove boosted to 1.0 Bar - does anyone who owns a Levorg with the 1.6 Engine know what their maximum boost level is?

    I've searched online and can't find any info.....

    My car has just cover 9000 miles and is about to go in for it's first service at the dealer.

    Thanks in advance for any comments

    Scott
     
  2. John Martin

    John Martin New Member

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    I get between 0.7 to 0.8
     
  3. ScottyLevorg

    ScottyLevorg New Member

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    Hi John,

    Yeah 12500 miles in and it looks like 0.8 Bar is all its going to do - looking at other 1.6 Turbo's on the market thats on the low side of what is possible - i'm guessing the engine is tuned for longevity and economy rather than performance - the tuners i've spoken to swear blind that they could remap a standard car to 200hp - i'm guessing that would mean upping the boost - having killed a few Subaru's that way in the past i'm reluctant to do it, especially under warranty!

    Anyone considering modifying their 1.6GT for a bit more performance?
     
  4. nipponcruiser

    nipponcruiser New Member

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    As far as I know, the 1.6 got the low torque variant of the CVT, so more power out of the engine could be dangerous. I rather would like some modification of the TCU, to get rid of the useless virtual gears in auto mode and for more smooth operations (mine acts quite rough sometimes).
     
    ozkan bicer likes this.
  5. Matic

    Matic New Member

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    Hi guys,

    I have heard from a subaru specialist in the netherlands (believe me, the guy is known for his mapping, also in the pro driving world) that mapping the levorg 1.6 is safe at 200hp and 290nm :)

    As soon as the engine warranty is over, ill be going for it i think
     
  6. nicodache

    nicodache Member

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    well, at the same time, the australian 2.0l apparently makes 265hp and 350nm.

    talking about output per liter, we get
    132hp and 175NM for 2l vs 106hp and 156NM for 1.6l.

    so definitely, mapping that fb16dit higher is doable without too much risk, and the figures you indicated seem fairly conservative :)
     
  7. Matic

    Matic New Member

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    For the motor yes, for the transmission, no.
    The 2.0 has a far better gearbox/transmission than the 1.6. Tests (in japan for example where they drive the levorg for about 3 years i think now) say that the number i have givven are safe, higher leads to breaking parts like the transmission-box.

    Cheers,
    Mike
     
  8. moojy

    moojy New Member

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    Have used the inline tuning box from tdi-tuning in UK on a 1.6). Gives you adjustable bhp from 199-213. No ecu remap needed.
     
  9. manumissio

    manumissio New Member

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    Hi Moojy
    what's your experience? Does the turbopressure go up? Is there more power/torque at lower revolutions? Stays the CVT in balance? Etc.
     
  10. ozkan bicer

    ozkan bicer Active Member

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    I have been using the TDI Tuning box for a couple of months now and it is still 0.8 max turbo pressure. I suspect the electronic measurement is not correct.
     
  11. moojy

    moojy New Member

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    I certainly feel more power and torque at lower revolutions. The CVT seems fine with this. Max boost pressure I have seen is 0.6.
    tbh, the boost and performance of the car is not it's problem imho. It is a very good engine and a good transmission. I have only just switched to automatic from a beautiful manual Impreza GB270. The challenge with the Levorg seem to be the odd configuration decisions Subaru always make. Everthing is a compromise when setting up a car, but Subaru's compromises seem to me to be pandering to no-one in particular:
    1. The transmission is just "sleepy", makes all the wrong gear change decisions. This is a software problem as far as I can see, not a hardware one, it is perfectly capable of making fast switches just doesnt want to. Adding the tdi-tuning box makes pulling out a little less scary cos at least you get some pull now; but the CVT does it's best to smother that if possible, but more torque/power from the box def helps. All of that without turbopressure readings being increased on my car - tbh I am not that fussed in what the pressure of the turbo is, (most turbos run around 6-8 psi anyway so 0.6 bar is about right), as long as I get the power and torque don't care how it does it.
    2. The suspension is just weird - crashy at front and wallowy at back. Subaru just doesnt understand suspension in my experience (owned 6 subarus over 15 years). The GB270 was tuned by Prodrive. Absolutely fabulous. Firm without being crashy. Pliant enough to swallow bumps and just stick to the road. Wish Subaru would ask Prodrive to help them with suspension for UK roads and not try to do it themselves, they haven't a clue.
    3. Biggest problem with the Levorg by far - the numb and artificial feeling steering. Heavy self-centering when you don't want it to be (would have bought a German Audi Panzer if I wanted that - what happened to the lovely light Japanese touch?). And fails to centre when you do want it to - has to be coaxed back into a straight line after cornering. Combined with a total lack of feedback, makes the handling really tedious. Basiclaly the steering needs to be guided all the time; the car has sharp handling and remarkable pace but it so hampered by being a reluctant cornerer. Again you get the feeling there is a fab machine under there that Subaru is trying to smother. This is the part I most want to fix. Whether on the twisties or on the motorway that steering is tiresome to drive. The GB270 was absolute bliss compared - I could drive for 10 hours continuous without feeling tired. This thing makes me want to get out after an hour.

    Some TDI tuning stats attached for the box. I can def recommend it.
    On "level" motorway driving I get around 40-42 mpg with it fitted while still getting 200bhp at the lowest setting. Now just wish I could sort the above problems.... :-(
     

    Attached Files:

  12. wd-levorg

    wd-levorg New Member

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    Hi Matic,

    As I am from belgium, do you have the name of this Subaru specialist in the Netherlands ?

    Regards,

    Wim
     
  13. wd-levorg

    wd-levorg New Member

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    Hi Mike,

    I think it is not only a transmission matter. The 1.6 DIT engine has a relatively small twin-scroll turbo, which is conceived in the first place for fast response, not for high(er) boost pressure levels. Higher boost levels may jeopardize the endurance of this twin-scroll turbo. Brett Middleton from our well-known MRT performance in Australia seems to confirm this.

    Regards,
    Wim
     

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