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    • Independent A90/MKV Toyota Supra B58 Dynojet graph shows big torque hit down low - 348 rwhp, 389 rwtq

      Good to see the Supra being tested outside of magazine hands as you never know who might get a 'cooked' press file or not. MotorTrend showed 427 lb-ft of torque at the wheels on a Dynojet in SAE which is quite a bit more than you see here for the new Supra.


      Dynos do vary (Dynojets tend to be consistent though) and the numbers are in different correction factors. STD tends to read higher but this graph shows higher RWHP than MotorTrend's test yet lower RWTQ:


      Did MotorTrend get a ringer? Maybe but it is clear the Supra is tuned for a big torque hit down low. The B58 actually does a decent job holding power up top despite the turbo quickly running out of steam as evidenced by the torque curve dropping hard.

      Power does drop past 5500 rpm though so these are not exactly top end monsters.


      This article was originally published in forum thread: Independent A90/MKV Toyota Supra B58 Dynojet graph shows big torque hit down low - 348 rwhp, 389 wtq started by Sticky View original post
      Comments 16 Comments
      1. threetirtyfive's Avatar
        threetirtyfive -
        "whp"
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by threetirtyfive Click here to enlarge
        "whp"
        ?
      1. Eleventeen's Avatar
        Eleventeen -
        The turbo could be running out of steam, but most likely the tune is just tapering boost downward in the upper RPM. I wish we had a boost curve plotted, but nice to see a real world dyno, regardless.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        The turbo could be running out of steam, but most likely the tune is just tapering boost downward in the upper RPM. I wish we had a boost curve plotted, but nice to see a real world dyno, regardless.
        Who would tune it like that? The turbo can't hold that torque peak.
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by Sticky2 Click here to enlarge
        Who would tune it like that? The turbo can't hold that torque peak.
        The factory would. They commonly taper boost in upper RPM’s. For example, the S55 is tuned like this from the factory. A lot of people don’t realize it, but the stock turbos on that engine are capable of holding 22+ PSI all the way up to the rev limiter. However, you wouldn’t think it looking at the factory tune. Different engine, but it is a clear example of how BMW does things (likely for engine / turbo longevity).
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        The factory would. They commonly taper boost in upper RPM’s. For example, the S55 is tuned like this from the factory. A lot of people don’t realize it, but the stock turbos on that engine are capable of holding 22+ PSI all the way up to the rev limiter. However, you wouldn’t think it looking at the factory tune. Different engine, but it is a clear example of how BMW does things (likely for engine / turbo longevity).
        The s55 curve doesn't drop like this. Toyota obviously gave it more low end at the expense of top end based on other B58's.
      1. crapinternet's Avatar
        crapinternet -
        it's got an itsy bitsy teenie weenie exhaust housing.

        I wonder if it will have crank hub issues like the s55

        I wonder how gimped the rods are and what the other failure points of the engine will be.
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by crapinternet Click here to enlarge
        it's got an itsy bitsy teenie weenie exhaust housing.

        I wonder if it will have crank hub issues like the s55

        I wonder how gimped the rods are and what the other failure points of the engine will be.
        The B58 has a completely different crank hub design. The timing chain and sprockets are at the back of the engine, so the crank hub will not affect timing. Hopefully, that will be a more reliable setup.
      1. kbaldi29's Avatar
        kbaldi29 -
        The guys at Real Street are full of everything needed to come up with solid results, if I have to guess, this is how the car behaves from factory, for sure would expect their next post about this car to be something relevant and from a source you can trust
      1. infliktyd135i's Avatar
        infliktyd135i -
        54 whp. From a "titan pro tune" what software are they using anyway? Is it Cobb?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by infliktyd135i Click here to enlarge
        From a "titan pro tune" what software are they using anyway? Is it Cobb?
        I don't think Cobb even announced anything for the platform, did they?
      1. threetirtyfive's Avatar
        threetirtyfive -
        Click here to enlarge Originally Posted by threetirtyfive Click here to enlarge
        "whp"
        I'm just commenting that everything quoted the other side of the pond is in 'WHEEL' horsepower but on an extremely accurate dyno in Europe- Dyno Dynamics, they make 350-370HP. If it really made 348WHP then the flywheel power would be about 417 and this simply is not the case for the stock car.
      1. infliktyd135i's Avatar
        infliktyd135i -
        Idk. I've been out of the car tuning loop for a few years now. That's why I'm asking lol. But is BMS getting a supra shop car? Anyone know?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by infliktyd135i Click here to enlarge
        But is BMS getting a supra shop car? Anyone know?
        @Payam@BMS @Terry@BMS
      1. Payam@BMS's Avatar
        Payam@BMS -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Yes, should be here any day now from what I recall.
      1. infliktyd135i's Avatar
        infliktyd135i -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        Yes, should be here any day now from what I recall.
        Great news! All the hate this car is getting from the mk4 fanbois is making me want to buy one even more lol.