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    • Dynojet dyno numbers for the underrated 2015 BMW F80 M3 - BMS tests the BMW S55 turbo inline-6 stock and with a Stage I tune

      Well that was fast! Burger Tuning took delivery of their brand new F80 M3 (100 miles on it when tested) recently. As they typically do with a new test car, it headed straight over to a Dynojet to get some baseline figures. The car is underrated as expected and almost customary with the new BMW M turbo era. BMW went even more conservative with the horsepower and torque ratings than they did in the F10 M5 as the S55 in the F80 M3 despite its 425 horsepower rating shows 427 horsepower to the wheels.


      BMW is basically rating the motor at the wheels what it is showing at the crank. They are playing the German horsepower war conservatively and keeping numbers low for the sake of competition and delivering them where they matter, at the tire. That way they do not get caught up in a power shootout on paper which Mercedes loves to do.

      The peak torque figure exceeds the peak horsepower figure which is interesting as the quoted torque figure is less than the quoted horsepower figure at 406 lb-ft of torque. The torque curve itself is not BMW M's best work but it is certainly flatter through the curve than the N54 and N55. It drops off toward redline as expected but it holds past 7000 rpm enough for the HP curve to not take a big dive. This is the best looking curve of a turbocharged M motor to this point.

      What about the tuned numbers? They take the M3 up to 479 wheel horsepower and 484 lb-ft of wheel torque. Roughly 52 wheel horsepower gained with a mild tune early on. This tune will develop but off the showroom floor if you want another 50 horsepower at the wheels you can get it on pump gas right now without anything else needed. This is just a guess but BimmerBoost would argue that it looks like ~500 whp for tuned S55 motors on pump gas will be the norm with basic supporting mods.

      BMW disappointed people with their crank horsepower ratings but did the smart thing overall. Why quote some big number when they know Mercedes and Audi both have a bit of displacement on them?

      BimmerBoost would also at this time like to point out its guess from last year as to the power output of the new M3 and the S55 inline-6:

      The only bright side BimmerBoost can see is that the new M3 may be severely underrated just like the F10 M5. Let's assume this is the case and apply what we have all seen with the F10 M5 to the new M3. That would mean 417 wheel horsepower for the new M3 despite its appallingly low crank rating. That would also mean an increase of 67 wheel horsepower over the E92 M3 which is a hell of a lot better than 30 horsepower at the crank.

      Not a bad guess, eh?








      This article was originally published in forum thread: 2015 M3 Dyno! started by Terry@BMS View original post
      Comments 93 Comments
      1. lulz_m3's Avatar
        lulz_m3 -
        480 already! Damn, you don't waste any time.
      1. rooringhusky's Avatar
        rooringhusky -
        Like a boss! Tune within 2 days, Terry your a machine Click here to enlarge

        Heres to hoping BMS has this market on lockdown!
      1. mjmarovi's Avatar
        mjmarovi -
        Good stuff Terry, the car looks great too!
      1. lulz_m3's Avatar
        lulz_m3 -
        Its crazy how lean they are running that engine into the power band.
      1. ChuckD05's Avatar
        ChuckD05 -
        lmfao T you do not waste any time...

        Seems about right honestly... This will beat 9/10 335s on the road stock which is better than I thought would be the case... and with your basic tune WITH stock cats be about even with the upgraded twin cars... Thats good to me.... RB power levels are good for 75% of the people who will buy this car with just having to plug in a few wires.
      1. ChuckD05's Avatar
        ChuckD05 -
        but its funny hearing the reviews say how blazingly fast this car is. And all this only 2 days with the car LOL

        Question though : What gear is closest to 1:1 ? You usually post 4th gear dynos on the n54 right? What did it dyno in 4th?

        also interesting how rich you ran her up top as well to gain power.
      1. bobS's Avatar
        bobS -
        What does a RB car do on this dyno? Jacked her up to 24 psi huh? hmmm.... I wonder how much room these stockers really have in themClick here to enlarge

        Props for getting this thing right on the dyno and tuning it!
      1. Terry@BMS's Avatar
        Terry@BMS -
        For DCT cars normally 5th as 4th is very short.

        Up next some e85 tuning.... Click here to enlarge
      1. ChuckD05's Avatar
        ChuckD05 -
        An rb car in a customers hands with an e85 off the shelf flash with e85 / 93 mix or meth or a mix of both at 19-20 psi with everything aligned will make 480-500ish depending on boost/map/conditions of weather and equip... more boost in mid range will bump that number up but you start really rolling the dice with longevity or reliability that's even considerably reasonable at 23-24 psi mid-range 20 at redline IMO obviously. But that will make from what I have seen 520-540 @bobS
      1. bobS's Avatar
        bobS -
        If I recall correctly, 5th gear on the e92 m3 dct is 1:1
      1. Group.america's Avatar
        Group.america -
        Great effort (already)... brilliant
      1. bobS's Avatar
        bobS -
        Click here to enlarge Originally Posted by ChuckD05 Click here to enlarge
        An rb car in a customers hands with an e85 off the shelf flash with e85 / 93 mix or meth or a mix of both at 19-20 psi with everything aligned will make 480-500ish depending on boost/map/conditions of weather and equip... more boost in mid range will bump that number up but you start really rolling the dice with longevity or reliability that's even considerably reasonable at 23-24 psi mid-range 20 at redline IMO obviously. But that will make from what I have seen 520-540 @bobS
        I hear you...i was wondering on this dyno since we all know dyno numbers can really vary...
      1. ChuckD05's Avatar
        ChuckD05 -
        Click here to enlarge Originally Posted by Group.america Click here to enlarge
        Great effort (already)... brilliant

        oohhh thattsss briilliiaannntntttttttt , oh the crosssss, Gooooooaaaaaalllllll...
      1. ChuckD05's Avatar
        ChuckD05 -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        I hear you...i was wondering on this dyno since we all know dyno numbers can really vary...
        T usually makes 500ish +, on that exact dyno, he just tuned an e85 blend car to 510 which is about what you would expect on that dyno i believe, Ando from BMW had the nicest curve ive seen with 500+ almost throughout the entire powerband on that dyno , i believe between 520-530 but they with what i pressume crapped out because he went to a small single not so long after i caught wind of the car "smoking" a little... other cars have made more but nothing you would do every day like this car will do on 93 octane with stock cats Click here to enlarge

        In no way am i knocking RBs because they are bad ass, i have them, dynoed 486 on a dynojet with a dying lpfp pump, insanely bizarre trim issues, causing overall a very unhappy car before i took them off just because of one smoking... but i felt i had to dyno it before i pulled them and was shocked with that power. RBs when it ran best got me an 11.3@126.7 which shows great power but this M3 would prob do that within a week through stock parts, T may expect more but to me thats outstanding!
      1. Boostmachines's Avatar
        Boostmachines -
        Very impressive! Looks like I'll be sub'ing to this thread and see where it goes. Might just have to order that Sakhir Orange M3 after all...
      1. fastgti69's Avatar
        fastgti69 -
        Awesome Terry! 480whp on just a beta tune is amazing. 550whp on racegas looks very promising!!
      1. mjmarovi's Avatar
        mjmarovi -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        Awesome Terry! 480whp on just a beta tune is amazing. 550whp on racegas looks very promising!!
        That would be huge.


        Anyone know what size the stock turbos are? It is a compound turbo setup correct? Maybe ~52mm turbo and a ~58mm turbo? With small turbine sides and ~.6x A/R for quick spool?
      1. ChuckD05's Avatar
        ChuckD05 -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        Awesome Terry! 480whp on just a beta tune is amazing. 550whp on racegas looks very promising!!
        i just said that before to a co worker, thats def realistic to achieve which would be awesome
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by mjmarovi Click here to enlarge
        That would be huge.


        Anyone know what size the stock turbos are? It is a compound turbo setup correct? Maybe ~52mm turbo and a ~58mm turbo? With small turbine sides and ~.6x A/R for quick spool?
        Wayyyyyy off. Basically RB turbos from the factory.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        Awesome Terry! 480whp on just a beta tune is amazing. 550whp on racegas looks very promising!!
        I don't see it unless Terry is able to jack the timing way up. Keep in mind that back end flash is not an option here. Maybe he could give Wedge a call....