Finally dyno'd my C200 with TMC Tuning Box
2010 C200 CGI, TMC Tuning Box, Modified BMS Intake, Straight pipe from the cat back to a single muffler, Sun Auto Voltage Stabilizer + Grounding Kit, Shell Ultra 5w40 oil, Shell V-Power Nitro gas (I think it's 98 ron grade).
We had to run the car in sport mode even in dyno mode as "C" caused the car to shift at 5xxx rpm's, in "s" mode the car was able to rev to about 6500 rpms.
Tq curves at top and hp curves under.
Red figures are when we were calibrating the dyno and car
Green is the TMC box on "0" setting which is suppose to be like stock. Only reason we did this is because TMC didn't include the bypass plug for the harness for when you unplug the box.
Pink is on the TMC preset of "6"
Blue is on setting of "7"
I ended up keeping the setting at "6" after seeing the tq curve on "7" which frightened me, also note that the hp on the "0" setting is greater but the tq comes later which is why I opted to lose a few hp in return for an earlier tq curve.
There is a video but after reviewing it saw no point in posting it as it doesn't show anything worth watching. Just the car on the dyno. The data is more relevant.
Here is the advertised gains from TMC
http://www.tmcmotorsport.com/TuningB...px?s=903385247
Original Tuned Gains
KW 135 169 + 34
BHP 183 230 + 47
NM 270 311 + 41
Factoring in drivetrain loss from the auto tranny (0.20), my hp figures are lower than advertised.

Last edited by Knightmare69; Apr 24, 2013 at 02:36 AM.
But, 230hp is quite a bit of improvement for c200. Keep it up!
I'd say you have a big problem with TMC.
by 20% efficiency loos with the automatic, I can see that for the 5 speed, but not the 7 speed, as TC slip is limited.
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I'd say you have a big problem with TMC.
by 20% efficiency loos with the automatic, I can see that for the 5 speed, but not the 7 speed, as TC slip is limited.
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As for the tq curve, the upgraded setting allows for the tq to come on earlier as well as increase from the stock figures no? "6" (pink) peaks at 240 lbs/tq.
OEM specs for 2010 C200
http://www.parts-specs.com/Mercedes-...r-sedan-056830
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Basically, your dyno run is messed up at lower end torque, and shows no hp gain.
Finally, you can not compare oem values with a dyno run. Only with and without runs on the same dyno are compareable.
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Last edited by kevink2; Apr 25, 2013 at 05:05 PM.
The chassis dyno run has transmission and other losses, and tries to measure power at the wheels. Only an engine dyno, at near standard conditions, will measure hp & tq to be compared with oem rated values.
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*edit- looking at it some more, though the bhp is off what they advertised, my tq figures are actually higher if my conversion is correct. 240 ft lbs=325 nm(?) If this is correct then I'm making more than their advertised 311nm.
Ah ok, you were talking bout an engine dyno.
Last edited by Knightmare69; Apr 27, 2013 at 02:11 AM.

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1) you can see the boost/torqure climb was the same a oem.
2) there was little/no gain in peak hp, so they tried to slide that by with hp gains where the torque gains were, but not peak values.
It's believable, based on reviews by owners.
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I have noticed in your first picture in the "cell condition window" that the "mechanical efficiency" is 70.00. I'm not sure exactly what that refers to, but could it be that you are calculating with a 30% drivetrain loss?
The results with the box on the "0" setting also might not be identical as bypassing/running without the tuning box. So your delta might hopefully be better then the graphs indicate. Could you get a reference run with the box bypassed? Have TMC bin able to give you some satisfactory support?
Best regards from Sweden
The last conversation I had with TMC (thanks for reminding me to post this) was that they dyno in the winter and autumn months with cooler air and run 102 octane race fuel plus 3 air conditioned cooler fans at the front. They also explain that they run cars completely stock (which mine is not so to speak, running BMS intake at the time and straight pipe from the stock downpipe to custom rear muffler (I've since gone back to stock box with K&N drop in and waiting on my Eisenmann rear muffler)).
Having said that, in the end TMC noted that not all dyno's are the same nor dyno environments. Also, the air in Hong Kong is usually humid aside from the heat, it is possible that did affect my results. Yes, the data may show that I didn't get the advertised gains but the car performs more powerfully than stock. In the end it does what I need it to do as it's still just a piggyback box but it's one of the better ones out there (in my opinion from my research) than others.
I eventually did get the bypass plug but arranging another dyno appointment has not been high on my list as just getting this session was a headache (few places with dyno's in Hong Kong so they tend to monopolize it with their favored clientele which I am not).
Yes, according to my research this one of few piggybacks that monitors/controls boost pressure, throttle body, cam shaft and inlet manifold pressure.
Did you notice any change in fuel consumption or acceleration with TMC?
Yes, acceleration has changed, both in sport and comfort mode.


