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  1. #26
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    Between the turbos & air/water intercooling, the S63 is gonna hate repeated pulls. There's no way the OEM cooling system will be able to overcompensate for rising IATs/coolant temps once this car starts getting mods beyond simple tunes.


    At least with air/air you can count on passive airflow & meth for immediate IAT reduction.
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  2. #27
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    Put a E46 M3 NA or E39 M5 or a E36 M3 Euro on dyno and see how much power drops off after 5 dyno runs on a summer day.

    Not less than F10 M5. I owned a dyno Dynamics for 6 years and power drops dramatically on the above mentioned cars as well.

  3. #28
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    OMFG THE M5 HAS WATER TO AIR INTERCOOLERRR!!!

  4. #29
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    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Put a E46 M3 NA or E39 M5 or a E36 M3 Euro on dyno and see how much power drops off after 5 dyno runs on a summer day.

    Not less than F10 M5. I owned a dyno Dynamics for 6 years and power drops dramatically on the above mentioned cars as well.
    Power will drop on all cars. But not to this level and an NA motor won't generated the same heat. Also once heat soaked you aren't dealing with bringing a water/air IC back up to temp.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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  5. #30
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    i can confirm this, my 130i never suffered this way on a dyno.

  6. #31
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    Click here to enlarge Originally Posted by cisi Click here to enlarge
    i can confirm this, my 130i never suffered this way on a dyno.
    It's a smaller motor and 130i means you had the N52 I guess?

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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  7. #32
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    yes, you can get near to 320 crank hp investing some serious money. I would like to see if the new 4 cyl. turbo (tuned to 300 hp) does not suffer from heat on the dyno like the N52 did. Quiet impossible in my opinion.

  8. #33
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    Click here to enlarge Originally Posted by cisi Click here to enlarge
    I would like to see if the new 4 cyl. turbo (tuned to 300 hp) does not suffer from heat on the dyno like the N52 did. Quiet impossible in my opinion.
    The N20 will put out more heat than the N52, no way around it.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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  9. #34
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    Click here to enlarge Originally Posted by KB Click here to enlarge
    I wonder if this is how BMW get the HP figures for their new turbo motors. Maybe they measure the HP after some heat soak and this is why we think they underate the engines but in reality they are what they say they are. We always see dynos with cool engines and try to make the conditions so we get the highest reading. What do you guys think?
    Absolutely 100% correct. Well done.

  10. #35
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    Thanks for all of your comments.

    You can clearly see the first cold run is not to be taken seriously at all. At this point the charge coolers do an excellent job at removing heat but cannot really do it for long.

    If any of you have ever spent a few thousand miles in an F10 M5 like we have and you have a sensitive tuning butt dyno you will have noticed very much the drop off in performance doing continuous runs on the road. The first pull is always spectacular followed by good performance for a while and then it starts dropping off.

    This is not actually that bad if you take away the first run.

    If you think this is bad then you need to experience forced induction without any FMIC or Charge Cooler! Now that is horrendous!

  11. #36
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    Click here to enlarge Originally Posted by evolve Click here to enlarge
    You can clearly see the first cold run is not to be taken seriously at all. At this point the charge coolers do an excellent job at removing heat but cannot really do it for long.
    Enough for a single pull or pass...

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