Eurocharged ECU/TCU DYNO on 06 CLK55 AMG
The thing that's got me scratching my head are the Dyno numbers. Both pulls on a DYNOJET. Pre-tune was 288.71 whp @ 318.96 tq. Post-tune was only 290.17 whp @ 326.08 tq. These seem a bit low to me.
As far as I know original OEM filters...etc.
So are the numbers within parameters, or should I be looking for something that might be causing the numbers to be off?
Much appreciated...

i did not think extracting a few extra HP would really change the driving experience enough to justify the cost, even with the gains that the tuners claim they can deliver




The 208/209 have exhaust restriction in the manifolds and cats. Many have installed aftermarket or home made headers to correct this phenomena.
Once the exhaust is open and free flowing, noticeable reductions in torque are observed while horsepower increases. One can tune the stock injector map to a certain extent for recovery of torque.
Misleading values can be attributed to shop temp, car temp and dyno operator.
Every hot rod or race car I put on the pavement always needed something else by my standards. Once you start opening up the engine there is no stopping.!!!
It is fun but expensive.
All the Best, Gator
You are correct. Those number are correct; however, you must have ran the dyno soon after the tune. Remember, the dyne reset the ECU. Though it is tuned it still needs to adjust. I would re dyno it in 30 days.
I am putting my 04 clk55 on the dyno friday.. Currently Secondary Cat/Resonator Delete.
I then will do plugs, drop in green filters, and a tune by OE Tuning.
I will post the results.
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I am skeptical of NA tunes...generally they net very little HP...20-30hp at the wheels is pretty dramatic for a NA tune.
The Best of Mercedes & AMG




Kleemann header on W209 need some cutting not direct fit.
I am interested in the exhaust issue though. I did not realize it was that restrictive.
Headers and a more free flowing exhaust are really that much of an improvement?
A great deal of times its not worth looking at top hp vs top hp as you could see 30whp under the curve.





