Quote:
Originally Posted by AMS Performance
263-269 is normal for W208 CLK55 AMG Dyno dynamics, those are healthy numbers. Adjusted for 22% loss you are right at 337HP & 389TQ. So you are down 5HP stock but up 13tq. Whats the mileage on the car? Perhaps a good tuneup may help (spark plugs & wires as well as new primary O2 sensors). Do you have a copy of your air/fuel ratios? I have a feeling your ECU may be pulling timing, perhaps fouled plugs or dirty fuel system. Also what was weather like?
Try running 1 can of seafoam in the gas tank to clean up the fuel system, that should get most of the gunk out and regain those few lost HP.
Nice work, glad you chose the DD dyno, should make for some accurate dyno comparisons in the future.
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I have some of the service records on the car.
Currently the car has 38,000 miles.
Spark Plugs were changed at 31,000. As well as the fuel system was checked and a new fuel filter and belts at the same time. However, it still has the original air filters, in it as their sevice interval is 60k. I plan on swaping these out for K&N's.
I don't have a copy of the afr's but if I remember right, it was sitting around 12 or so.
The weather was 88F and 43 percent humidity.