kb24forlife24

Hey guys, I wanna see how much HP my car is making. It has 113,00 miles and it's an '05 CLK500. HP mods are: ECU and exhaust.

What precautions should I look for before taking my car for a dyno? I don't want to damage the car !

Thanks!

EDIT: Got the dyno done, the exhaust nearly destroyed my ears! Here's a video of the run.

insame1

Change your oil and spark plugs.

kb24forlife24

I did oil about 1000 miles ago and the spark plugs were done less than 4 months ago

91ser

You should be fine, a dyno shouldn't add extra stress that a highway pull wouldnt. Please post your results when you get them! And let us know which dyno it was performed on.

kb24forlife24

Will do, just gotta find a place to dyno my car haha

91ser

Should be plenty of dynos in your area. I would recommend finding a dyno day with a group. Usually, dyno places do not want to hook a car up for just one quick pull.

kb24forlife24

Stay tuned, I have a dyno session scheduled today at European Auto Source.

kb24forlife24

So I did a few runs. They had a hard time holding it in the gear that they wanted (5th gear), so most of the runs was in 4th gear. I made 270WHP and 305 WTQ

They got one 5th gear pull in and it made 280 WHP and 315 WTQ. I was really satisfied with the numbers and it was really loud as well. Pictures and videos will be coming later.

Fatz

On what kind of dyno machine were the runs made?

kb24forlife24

It was on a Dynojet

91ser

Damn those are some healthy numbers!! Do dynojets tend to read a little high? The 5 speed tends to suck the power from the engine, so Im surprised to see such high numbers.

kb24forlife24

My car has the 7-speed transmission. I was surprised by the torque. With a 15% drivetrain loss, that's 370 torque! Does anyone know the actual drivetrain loss percentage?

Fatz

Total hp loss from the crank to the wheels is about 30%. The torque numbers will be close. The loss is the drivetrain plus all the other stuff under your hood that makes it a Mercedes....

The dynojet is about 10% higher than a mustang dyno for a 300-400 hp vehicle.

kb24forlife24

Check out the original post for the video of the dyno!