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    • McLaren 720S topping 900 rwhp on the factory M840T turbos with methanol injection and Dyno Spectrum tuning - Stock, pump+meth, race+meth dynos

      Dyno Spectrum is extracting more power from the factory McLaren 720S M840T turbocharger than, well, anyone else. Just take a look at this example hitting 905 rear wheel horsepower with race gas and methanol injection.


      Let's take a look at the graphs at various stages of tuning and fuel.

      Race + meth:


      Overlay pump gas 836 rwhp, pump + meth 874 rwhp, race gas + meth 905 rwhp:


      All overlaid with factory tune:


      Another 200 whp over stock with race gas and meth on the factory turbos is simply astonishing.

      What a beast!

      This article was originally published in forum thread: McLaren 720S topping 900 rwhp on the factory M840T turbos with methanol injection and Dyno Spectrum tuning - Stock, pump+meth, race+meth dynos started by Sticky View original post
      Comments 11 Comments
      1. kbaldi29's Avatar
        kbaldi29 -
        Love the results, for sure they are good at what they do... SAE correction Click here to enlarge doesnt get any more fair than that...

        I wont deny the curve on top looks extreme and the sudden drop right around 8k is not just highly uncommon for a stock turbo car, but it reassembles the very distinguished nitrous shot abnormal shape, I wonder if they forgot to include this into the mods used to produce this power, or this if just a incorrect assumption from my end!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by kbaldi29 Click here to enlarge
        but it reassembles the very distinguished nitrous shot abnormal shape, I wonder if they forgot to include this into the mods used to produce this power, or this if just a incorrect assumption from my end!
        I definitely hope this isn't one where the nitrous wasn't disclosed. The torque curve does take an interesting jump.

        Also @kbaldi29 where are all those graphs I asked for especially the McLaren ones Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        This is another car tuned at 6000+ elevation so just wanted to point that out. Maybe @Mitch@Dyno Spectrum can shed some light.
      1. kbaldi29's Avatar
        kbaldi29 -
        Im sorry for disturbing the waters unnecessarily if it wasnt used on this vehicle, but I am really was curious about the shape of the graph.

        As far as the graphs @Sticky, I am pulling my hair out with a few things, as soon as I get over this humps will get on top of all of it, my apologies for the wait.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by kbaldi29 Click here to enlarge
        I am pulling my hair out with a few things, as soon as I get over this humps will get on top of all of it, my apologies for the wait.
        No problem. I'm not only curious as to the results but want to write some articles on the tuning.

        Click here to enlarge Originally Posted by kbaldi29 Click here to enlarge
        Im sorry for disturbing the waters unnecessarily if it wasnt used on this vehicle, but I am really was curious about the shape of the graph.
        Honestly, I think your question is very fair.
      1. Bowser330's Avatar
        Bowser330 -
        Couldn’t ending the dynonrun by letting off the accelerator produce that drop at 8000 you speak of?

        also it looks like the real difference between the tuner graphs starts at 6000 and that could be mitch’s tuning for timing adjustment or additional boost for the additional octane available.

        A 40hp bump from pump to pump+meth and a 30hp bump from pump+meth to race+meth seems very doable with timing adjustment from an experienced tuner.

        it would have to be a pretty small shot at 6000rpm to bump it up so little, 25 shot?
      1. subaru335i's Avatar
        subaru335i -
        Just the double hump in the torque and power graph is definitely odd.
        Looks like either twin sequential turbos or nitrous graphs.
      1. Vlps's Avatar
        Vlps -
        nothing looks abnormal on that graph
      1. Sticky's Avatar
        Sticky -
        There are a couple questions on a couple graphs from Dyno Spectrum so let's see if @Mitch@Dyno Spectrum can clear this all up for us
      1. Mitch@Dyno Spectrum's Avatar
        Mitch@Dyno Spectrum -
        There is no nitrous on this car. The hump is just from us trying to keep torque down, down low. We add more timing to the top end as that is where the car is living when doing pulls.

        The drop is just from getting off throttle. This car is at 4000ish feet not 6000 as these cars were in Canada.

        Let us know if you have any other questions sorry for the delay we have been on the road.

        Mitch
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        There are a couple questions on a couple graphs from Dyno Spectrum so let's see if @Mitch@Dyno Spectrum can clear this all up for us
        You need to learn to trust me more Click here to enlarge