Tune.

Discussion in 'Subaru Levorg Modifcations' started by Lenny, Jun 29, 2018.

  1. Lenny

    Lenny New Member

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    Has anyone had their Levorg tuned yet? If so how was it air/fuel or a bit more boost as well. If so what boost are you running and what numbers is it putting out? Also what is considered safe for the CVT if you're not into crazy launches from the lights?
     
  2. Scottyd

    Scottyd New Member

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    Good question as I noticed on a web site for wheel specs [link here] they list the Japan Domestic Market model with a power output of 221kw for the 2018 model where the Australian model is only 197kw.
     
  3. Lenny

    Lenny New Member

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    Apparently MRT list their output figures for the XA and XB upgrades (both CVT safe) on their website but I haven't been able to find them.
     
  4. Scottyd

    Scottyd New Member

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    I looked at MRT before I bought my Levorg as I was considering the XT Forester and getting it chipped to up the power. Might take my Levorg to them in a year or two anyway.
     
  5. Oz B-Spec

    Oz B-Spec Member

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    My understanding is that around 200kw at the wheels is the limit of the CVT. I remember reading somewhere that with a transmission cooler, the CVT "could possibly" take more.
     
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  6. Scottyd

    Scottyd New Member

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    Ah so there is room for a bit more power? Or do Subaru quote power figures from the wheels?
     
  7. Dee

    Dee Member

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    A few members and ex-members have had a tune and no issues so far with an exhaust upgrade, with about 20-25kw gain from memory.
     
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  8. Oz B-Spec

    Oz B-Spec Member

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    Subie quote 197KW engine, so allowing for 30% loss from the engine to wheels, then the factory @ the wheels would be around 140KW (give or take). I believe full exhaust with highflow cat, cold air intake, and more boost should see near enough to 200RWKW.
     
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  9. nicodache

    nicodache Member

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    I thought it was 200cv, not 200kw. That only makes at 36% difference :D
     
  10. iad

    iad New Member

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    I have written about it elsewhere, but to sum up - I have had a tune done, then have since added an Invidia J pipe along with a second dyno tune.
    The gain from stock is at least +27kw at the wheels. And it is now is a completely different car to drive since that was done.

    What I am going to do next is get an additional CVT transmission fluid cooler installed. I understand that reduces the risk of transmission failure with modified motors.
     
  11. SkyBeam

    SkyBeam Member

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    Interesting that here people talk about max kW the CVT can take. As of my understanding the CVT has a maximum torque (Nm) it can handle. Obviously the 1.6l model puts out a max. of 250Nm and I think I read the limit is at about 300Nm without chain slip.
    The maximum Torque it can handle is mainly limited by the hydraulic pressure applied to the pulleys. I think I have seen a video from MRT where they tried to increase the pressure to allow the CVT to take more toque.

    So if the CVT takes a peak of roughly 300Nm it might be safe to put on about 280Nm and this isn't much more than the factory. The 1.6l VM4 model is making 250Nm from 1800 to 4800rpm. Basically the torque curve looks pretty flat. So if you want to increase power you either need to expand the rpm area or to increase torque. As we know torque cannot be safely increased by much. Also providing 250Nm earlier than 1800rpm is not easy to achieve on a 1.6l engine. Nor does it often make sense to rev the engine > 5000rpm. So the engine is pretty much tuned to the maximum this CVT can handle in daily driver conditions.

    The 2.0l model seems to have s different CVT which is designed to deal with 350Nm. Unfortunately this model is not available in my country. But this CVT might be able to deal with 400-450Nm of torque. Still I believe the CVT is potentially the limiting factor here for any kind of "safe" tune.

    Adding extended cooling to the CVT transmission fluid might help preventing overheating the CVT if high power is applied during long period (race conditions) but is likely unnecessary for daily drivers just doing a launch-control start every now and then. Even my 1.6l deals with that perfectly (and yes, interestingly even the 1.6l baby-Levorg has a built-in CVT launch-control).


    So bottom line is - as sad as it sounds - the limiting factor for our Levorgs is the CVT without much room to get around it. I was wondering whether one could fit the 2.0l VMG CVT into the 1.6l VM4 model and tune the 1.6l. But it sounds quite silly to me unless you want to show off pulling > 350Nm with your small 1.6l. Moreover it would likely require a bunch of drivetrain modifications too as the physical size of the CVT seems to be different. In general the 2.0l seems to be the better choice and even consuming less gas while providing more power.
     
  12. Oz B-Spec

    Oz B-Spec Member

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    I'd love to see a manual conversion as well. I would assume that the WRX box would bolt up to the Levorg FA motor, however, I'm not sure on the CVT vs Manual box dimensional difference.
     
  13. Lenny

    Lenny New Member

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    I think 200kw at the wheels in a Levorg with the right set up would be a whole lot of fun. I've got friends with WRX's running those numbers and they get along nicely.
     
  14. Oz B-Spec

    Oz B-Spec Member

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    Definitely would be a fun car at 200RWKW.
     
  15. subidriver

    subidriver New Member

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