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    • Why wait for an M8? Gintani already tunes the heavily underrated 2019 BMW G14 M850i xDrive N63TU3 - +82 awhp

      Waiting on the G14 M8? Well, the N63TU3 4.4 liter V8 under the hood of the G14 M850i xDrive is no slouch itself. Considering the M8 is going to be an easy $150k+ car out the door the M850i in that context is a value.


      Especially when you unlock the potential in the motor. BMW rates it at 523 horsepower and 553 lb-ft of torque stock. Gintani's Mustang baseline shows 460 all wheel horsepower and 515 lb-ft of all wheel torque proving BMW is sandbagging output quite a bit.

      An F10 M5 will baseline ~450-480 wheel horsepower on a Mustang dyno. With a tune, you'll see ~540 whp.

      That is the level out output Gintani is getting out of the M850i with just a Stage 1 ECU dyno tune on 91 octane pump gas:


      The power curve up top especially is much stronger but all of these modern BMW twin turbo V8's are torque monsters down low. You wouldn't want to line up with this car at a stoplight.

      Based on F10 M5 dyno results the M850i is making a little less peak horsepower stock but more torque. Considering this is sent to all four wheels through an automatic, the M850i is easily a 600+ crank horsepower car in stock form.

      This article was originally published in forum thread: Why wait for an M8? Gintani already tunes the heavily underrated 2019 BMW G14 M850i xDrive N63TU3 - +82 awhp started by Sticky View original post
      Comments 1 Comment
      1. nbrigdan's Avatar
        nbrigdan -
        I just finished the most recent GT episode which had this car beating the new Bentley Continental GT W12 in a drag race in the wet. I had to look this article up to understand why, what a beast of a motor.