When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Getting the car dyno'd just for curiosity on Monday morning - car has 83mm upper, OTS Eurocharged 93 octane tune, and your basic cooling/recover mods. Weather is in the high 60s low 70s nowadays where I am. Will post dyno sheet when I have it ... looking for 440-450rwhp and 500rwtq. This car feels noticeably stronger than my previous two 06s... I know all dynos are finicky, depends on the day/shop/prep, but I'll have a good idea where the car is. No more power mods, perfect street daily driver set up for around town.
How are the whp measured on these dynos? The numbers I see from dynos in the US seem to be noticeably higher than what I've seen here in Germany for example.
Here a stock E55 would have around 480hp at the crank and drive train loss its about 100hp, so we'd say 380whp
Dynos can be a poor measurement of performance. And the type of dyno and how it's calibrated can have a huge impact on results.
My car: 05 E55 wagon with 72mm upper, split cooling, larger front mount intercooler, kleemann midlength headers, no cats, K&N, and custom dyno tuned by a speed shop in Atlanta. RWHP from a mustang dyno? 424hp. If you assume 15% drivetrain loss that's about the same as a stock E55.
Dynos can be a poor measurement of performance. And the type of dyno and how it's calibrated can have a huge impact on results.
My car: 05 E55 wagon with 72mm upper, split cooling, larger front mount intercooler, kleemann midlength headers, no cats, K&N, and custom dyno tuned by a speed shop in Atlanta. RWHP from a mustang dyno? 424hp. If you assume 15% drivetrain loss that's about the same as a stock E55.
Mustang dyno's are terrible and easy to maniputlate. The standard is dynojet. All the big engine builders, nascar etc use dynojet.
Mustang dyno's are terrible and easy to maniputlate. The standard is dynojet. All the big engine builders, nascar etc use dynojet.
R.K.
Yeah, I'm not worried. The car has had about 80,000 hard miles with the mods and has been problem free. I've outrun FBO e92 335's, Dragy says I'm good for 0-60 in under 4s. I'm not complaining, just saying dynos can be a finnicky way to test your car. Real world "butt dyno" or a prepped quarter mile track are a much better measurement.
It seems the drivetrain loss is the key factor, as you use 15% and all dyno charts I've seen here were roughly 95-110hp power loss on M113k.
With a 72mm pulley it could be, that your IATs are too high on the dyno and the car limits power.
But yeah acceleration times are also a good indicator for power, but there's other things that come to play here too, like weight, grip and weather. It's nice to see the power and torque curve though.
I agree with you all - I've never used a dyno to measure performance and never will, hence why I said just for curiosity. This is more of a "let's see what she does and just to see the graph (like Uncle said above)" sorta thing. I know for an E55, this car has and is performing better than my prior two with the same mods.
Thank you for the graphs, folks. Appt changed to tomorrow am (I had a work conflict) so I'll be sure to post back once I have the graph and numbers ...
Unfortunately no, the SC pulley bearing was already coming apart when I went in to get a baseline so we skipped that. There are more than plenty of stock dynos floating around though.
I’m very happy with the results. A bit rich, but I guess a box shelf tune is safe for a reason. Mods in sig, I knew this car felt significantly stronger than my prior 06s right off the bat when it was stock…
Get a good set of longtubes and call it a day: https://mbworld.org/forums/c219/7351...ml#post7784990 the 83 pully will help keep the IAT cooler w/o having to go nuts with cooling mods. My build I tried to make as much HP/TQ as possible w/o having to increase too much boost.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Slideshow: The 2027 update adds a fully digital steering system, revised styling, and potential charging upgrades as the company looks to revive interest in the luxury EV.
Slideshow: From problematic air suspensions to early dual-clutch transmission issues, these specific models and years stand out as the least dependable modern Mercedes vehicles.
