Featured A90 Supra MKV on the dyno

Discussion in 'General Supra Topics' started by Goose, Jul 23, 2019.

  1. OP
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    Goose

    Goose Well-Known Member

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    I did another dyno test on a Superflow dyno. We did 5th gear and 6th gear, and the differences were negligible. They were within 2 whp and 2lb/ft of each other. I used Performance Factory, up in Concord. They also read the boost at 16psi

    20190802_112459.jpg
     
  2. Rotaryrunner

    Rotaryrunner Well-Known Member

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    297hp at the crank? o_O
     
  3. OP
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    Goose

    Goose Well-Known Member

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    AWD dyno with all the rollers going. It's about the same as the Dyno Dynamics showed. When I toss her on a Dynojet, she'll show the high numbers that everyone else is seeing.

    The DD they played with correction a bit I discovered. Normal, was about dead on with what toyota claimed.
     
  4. OP
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    Goose

    Goose Well-Known Member

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    I work later in the day on Thurs, so I'm going to see about some dyno time in the AM on a Dynojet
     
  5. BRX

    BRX Well-Known Member

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    Then we can roll that as a fluke :dunno:

    Was the wideband hooked up on your car? 15-14:1 is way too lean for the amount of boost it's pushing even if it was direct injection.
     
  6. OP
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    Goose

    Goose Well-Known Member

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    Yeah, it was.

    Edit: this is why I'm tossing it on different dynos. It's interesting to me to see how they all rate the same car (despite other variables, like temp and humidity)
     
  7. AHP

    AHP Well-Known Member

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    You're conflating a few different concepts here that I am not going to attempt to untangle for you in this thread. You have words off of a screen, I have real world experience/data with multiple cars on multiple dyno types; none of which are directly influenced by gear ratio in the ways you've attempted to describe. Conversely, the higher the numerical ratio the lower the dyno reads (because physics - inertial losses) although true engine output is not affected. There are some dyno programs that allow you to compensate for these losses, hence why they can be exploited to inflate the numbers.
     
  8. BRX

    BRX Well-Known Member

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    Even though the drop in AFR looks dramatic in your graph it's not that big of a change. However it does correspond to when the ECU reaches peak boost or some kind of power limiter and it clearly shows the car has more in it than it's allowing.

    I hope it's a calibration issue on that dynos wideband. Have you checked what's the AFR at idle? If your readings are correct then maybe someone who has tuned B58s could chime in on how lean these engines run.
     
  9. OP
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    Goose

    Goose Well-Known Member

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    We didn't. When I get on the Dynojet, I'll ask if they can run a wideband, and see what it says.
     
  10. OP
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    Goose

    Goose Well-Known Member

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    Dynojet. AF on the bottom

    IMG_20190805_141054_957.jpg
     
  11. BRX

    BRX Well-Known Member

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    Can't see the AFR axis. However I think you're the second +400tq stock MKV.
     
  12. OP
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    Goose

    Goose Well-Known Member

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    Oh damn. Lemme see here...

    Here's the shop's facebook post.

    FB_IMG_1565029235413.jpg
     
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  13. kona61

    kona61 Well-Known Member

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    15 under boost is pretty darn lean.
     
  14. BRX

    BRX Well-Known Member

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    That explains the high MPG rating lol. I guess that's a good thing meaning it has a high tolerance to knock/detonation. Running it rich at 11-12 AFR should allow for a lot more boost and timing.
     
  15. OP
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    Goose

    Goose Well-Known Member

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    This car is going to be stupid fast once we get some good tunes into it.
     

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