A 2005 Mercedes-Benz CLK55 AMG with a 50-shot of nitrous hits the dyno to test the real world improvements.
MBWorld member Nurburgringer recently added a nitrous system to his 2005 Mercedes-Benz CLK55 and he hit the dyno to find out how much power he gained at the wheels with a “50-shot”. For those unfamiliar with nitrous oxide, a setup is typically measured by how much power it adds, so a 50-shot should add somewhere in the area of 50 horsepower. In some vehicles, the engine takes to the laughing gas a little better and picks up more than 50hp and in others, it adds a little less.
To see just how much of an impact the 50-shot makes on a 2005 AMG CLK55, the OP headed to the Eurocharged dyno for a couple hard pulls. Not surprisingly, the 50-shot added about 50 wheel horsepower in the bottled Benz and he documented the whole process in a thread in the W208/W209 section of the forum.
Nurburgringer’s AMG
The 2005 Mercedes-Benz CLK55 AMG owned by Nurburgringer has been to the dyno a handful of times. When he hit the rollers stock, the car laid down 300 wheel horsepower, which is about 20% down from the official power rating of 362 horsepower at the crankshaft. With an automatic transmission, a drivetrain loss factor of 20% is pretty reasonable, so 300rwhp is a solid figure for the stock Benz.
Next, he added headers to his CLK55, tuning the engine to make more power with the better exhaust flow while also tuning the transmission to make better use of the extra power. After the headers and tune, this 2005 AMG made 326 horsepower at the wheels, picking up 25whp from the headers and the tune.
Hitting the Bottle
After that, Nurburgringer wanted to add a bunch more power, so he added a 50-shot setup from Nitrous Express to his Mercedes-Benz and hit the dyno. With the 50-shot, the CLK55 sent 374 horsepower to the rear wheels, up 48whp from the headers/tune dyno run. It should be noted that the nitrous system also added 54lb-ft of rear-wheel torque, jumping from 329 to 383.
Unfortunately, there is no video of the bottled dyno run, but the video below offers a look at this car during the header/tune dyno run, so you can hear the 2005 Mercedes-Benz CLK55 AMG roar, courtesy of the YouTube channel of kedelbach.
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