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    • Dyno Spectrum sets new McLaren M840T power output record - 1139 rwhp

      This is an absurd amount of power on the factory M840T McLaren 720S 4.0 liter twin turbo motor. Dyno Spectrum set a new output record on the platform with an 1139 rear wheel horsepower pull on a Dynocom dynamometer.


      Yes, Dynocoms have a reputation of reading high but nobody is close to this output:


      How are they doing it? Nitrous. Perhaps @dyno spectrum can let us know how much nitrous exactly.

      Keep in mind this is a stock bottom end M840T which means this engine is quite stout surviving big boost plus a torque hit from another power adder.

      We will eventually see the 720S make this kind of power boost only but for now this is the overall output record.

      This article was originally published in forum thread: Dyno Spectrum sets new McLaren M840T power output record - 1139 rwhp started by Sticky View original post
      Comments 11 Comments
      1. Stevenh's Avatar
        Stevenh -
        I see Colorado plates and a correction factor being used.... From my personal experience, those correction factors throw things all of whack when you bring altitude and turbos into the equation. My car was baselined on a dynocom at 5,280ft elevation and made 437whp raw... once the correction factor was added in that number became 525whp and there is no way my car made that much power. Wasn't this the same group that claimed the stock turbo 1/4 mile record and only admitted there was some nitrous in the equation after we questioned them?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Wasn't this the same group that claimed the stock turbo 1/4 mile record and only admitted there was some nitrous in the equation after we questioned them?
        I don't think they claimed a record but nitrous was revealed afterward, yes.
      1. Vlps's Avatar
        Vlps -
        wonder how much in can take before it blows. stock huracan engine can take 1400 whp for a very short amount of time before failure (gosha turbo tech), fails after a year of use at 1120 whp (boostitforward)
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Vlps Click here to enlarge
        fails after a year of use at 1120 whp (boostitforward)
        What failed at 1120?
      1. Vlps's Avatar
        Vlps -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        What failed at 1120?
        his stock huracan engine failed at 1120 whp aftter a year of pulls
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Vlps Click here to enlarge
        his stock huracan engine failed at 1120 whp aftter a year of pulls
        That's impressive. Grab an R8 or Huracan and you can run ~1000 whp without touching the motor.
      1. Vlps's Avatar
        Vlps -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        That's impressive. Grab an R8 or Huracan and you can run ~1000 whp without touching the motor.
        yeah 800 daily setting, 1000 race setting will last a few years at least. pretty impressive for a platform designed to run on half of that, ~480-490 stock
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Vlps Click here to enlarge
        pretty impressive for a platform designed to run on half of that, ~480-490 stock
        Audi knew people would boost the motor. Plus motors built for extended 9k rpm runs need strong internals as revs can hurt just as much if nore more than torque hits.
      1. Mitch@Dyno Spectrum's Avatar
        Mitch@Dyno Spectrum -
        No one knows the limits, but I mean we have pushed this car pretty hard. We took it back out and trapped 157 but track prep was pure $#@! so we couldnt 60ft to save our lives. Need a better prepped track and I think the car can get the 8 at high elevation which is impressive.

        -Mitch
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Mitch@Dyno Spectrum Click here to enlarge
        We took it back out and trapped 157 but track prep was pure $#@! so we couldnt 60ft to save our lives. Need a better prepped track and I think the car can get the 8 at high elevation which is impressive.
        I think that's the new fastest record too. May I see the slip please?
      1. Mitch@Dyno Spectrum's Avatar
        Mitch@Dyno Spectrum -
        Yeah. The et was not great since there was no traction especially when the nitrous actually hit.

        Attachment 58803