Jons95c36amg

Ok heres my stock Clk55 with 47k on dyno..

Jons95c36amg

So much for 342hp crank Hmm no wonder I keep up with e92 M3s and 135i with 350whp on a highway roll suckers!

jturkel

wow. great numbers....are you sure you are stock? did you buy your car used? those are HIGH HIGH stock numbers, especially on a dyno dynamics

Jons95c36amg

Yes but with one of the maf screens removed on the airbox. Thats it! Just did oil change 5-40w Castr syntec BP 93 gas. Bought it over a yr ago with 36k.

Jons95c36amg

Just look at the **** trq #s!

E55AMGFan

Some say your engine is running strong and that it's making lots of torque, all we know is that it's underrated! (Top Gear like reply )

400hp and 425ft-lbs to the crank is something else. WOW! If i had one of these I'll debadge the car and surprise unexpected competition.

jturkel

jon

you should race BlackCLK550....he's been talking crap about being able to pull on a CLK55.....you should put him in his place (assuming you guys are close by lol) and represent AMG powa lol

Jons95c36amg

Well you know me I would run almost anyone. Good thing I got the dyno runs. Well #s don't lie which explains my surprising close runs with other high hp cars.

jturkel

this is true.....i just dont see how your car dynos that much stock......are you sure you dont have a tune on there? do you have a graph of your A/Fs?

when i bought my car used, it had a tune and i didnt even know it.......not saying you do, but maybe a possibility? i mean, abnormal is an understatement. dont the CLK55s dyno like 270 stock on a dyno dynamics?

https://mbworld.org/forums/clk55-amg...ock-clk55.html

i mean, 50whp over stock is crazy sounding. to make that kind of power on an NA car, it sounds like there would have to be some exhaust work and tune at least, no?

Jons95c36amg

Yeah I was kind of shocked with those #s. But the owner told me he dynoed e55 kompr which varies 380-420whp. Also e46 m3s 280-300whp. E92 M3s 330-350whp. Anyway I do have a very strong motor. Also my friends 02 Pont WS6 6spd with (lid,headers,high flow cats,full exhaust,tune). When I run him from 65-1xx we are close.

E55AMGFan

Easily a high 12s car is what you got given what you ran at the strip with a slow 60 foot. If that was in the 1.7-1.8 area, high 12s would be there all day. What other cars did you surprise with this beast of yours?

Chappy

Wanna race for pinks??

AMS Performance

What was the temperature on the run, also what gear? Also I think the gearing may have been off a bit b/c the redlines don't match up which may explain the slightly higher numbers, it shows going to 6350-6400rpm, usually on DDs the redlines should match up perfectly. Something tells me your car may have software also based on the shape of the curves. Stock curves on CLK55 AMG should be completely flat past 5000rpm (the CLK55s are software detuned from the factory at 342/376, otherwise they would make same numbers as the E55s 349/391).

Most W208CLK55s will dyno between 260-290 at the wheels on DD dyno. In addition, DD dynos for mercedes front engine RWD autos have a drivetrain loss of 22%. So that means @ 327wheel HP you would be making 420HP (which is obviously not possible). I don't mean to be a buzzkill but something is not right with the dyno. Whether the operator didn't calibrate the gearing properly or over compensated for something else (not sure). Assuming you have software, you should dyno somewhere in the 290-310 range (at most). Either way, it appears the car is not stock just based on the shape of the curves alone. If I were you I would go back to the shop and ask the car to be redynoed for free as they results are inconclusive...

There is a possibility you do have engine & TCU software done which will explain how you have a 6400rpm redline (like the later model AMGs), and if so I wonder if they somehow programed Torque converter lockup to kick in at higher rpms but again not 100% sure what setup your car has. If that is the case then yes those numbers could be possible on a DD dyno, otherwise it just looks like dyno error.

I have attached a picture of what a true stock W208 CLK55 should dyno on a DD dyno (customers dyno). That is on a bone stock CLK55 with 49k miles. Also you can see the redline rpms match up and the shape of the curves are true stock shape.

Jons95c36amg

It was dynoed in 3rd gear. Also the car had to be in dyno mod(esp,abs)disabled. I removed one of two screens in the airbox. There is another one in the Maf sensor. Which is maybe good for 15hp.

Jons95c36amg

My sig time I had dirty air filters (40k original) Humid conditions. So in cool dry air I should be trapping 110. I also ran this 04 Stang Mach 1 supercharged. Close run.

AMS Performance

The MAF screen delete does not make 15 HP, K&N filters only make a couple of HP and the stock air filters are a much bigger restriction, gains from MAF screen are purely psychological. Something is definitely not right with the dyno, you should go back and have it redynoed. If your redline is 6000rpm on the road, and the dyno shows 6400, then obviously the right specifications were not entered by the dyno operator (they should do it for free). Think about it, the numbers do not add up. If you were making 420HP in a car that weighs 3450lbs your times would be a heck of a lot better than low 13s (or even high 12s).

If you look at both DD dynos provided (both the one I posted and the one in the other link), both dynoed 263HP (within 1 HP of each other), so obviously that's where you should be at roughly. 263.x comes out to 337-339 (a few HP shy of the 342 rating which is about right considering the cars have some mileage on them & etc). Unless the dyno operator tried to manipulate the numbers in order to give you crank numbers or give you a dynojet equivalent (which some DD shops shouldn't do but some do b/c of peer pressure from those saying "why is it so low" blah blah), then I could see how you could get 327HP, but 327HP on a properly setup DD is A LOT of power.

Not trying to be blunt or impolite at all, I am merely trying to help you out so you do not have false expectations of what you are really making. If you really want to double check the numbers you can see what you dyno on a dynojet. If the numbers are same or higher than the dynojet than something is definitely wrong, normally they should be separated by about 4-5% to the downside, and I just don't see you putting down 343HP @ the wheels on a dynojet on a bone stock car when crank rating is 342HP. Just trying to be honest & help you out.

with that said... the W208 CLK55s are deceptively quick and with the right NA mods they can beat new M3s & some of the heavier compressor AMGs (in some cases with ease).

Hope that helps.
~AMS~

jturkel

i've actually read about this MAF screen delete before on LS1tech.....some guys dyno'd and gained a similar amount.....however, the car soon adjusted and went back down to the stock number with it back on.......interesting.

i still think there might be a secret tune on this car installed before it was purchased. i now know why everyone doubts jon's car......and the numbers are clearly there, dyno being wrong or not......but that is SO high without a tune or exhaust.....its almost like a different motor lol

AMS Performance

I agree, based on the dynos provided the chart is too peaky to be a stock tune. Based on both DD dynos provided, power should peak out at roughly 4800 and then flatten out for the rest of the rpm band, that is very common on the W208 CLK55s due to their software detune from AMG.

Unless he has a hidden stroker motor that nobody knows about (including himself) theres definitely some fudging going on due to operator error (not Jon, but the dyno operator).

Jon, have you looked under the car to see if you have high flow 2nd cats? Perhaps it was overlooked, 2nd cats on the W208s get you 10hp/12tq alone on DD dyno so that would definitely get you part of the way there to 327, but either way the numbers are just too high no matter how you slice it (unless there are some serious well hidden mods).

Either way it sounds like a strong car and glad to hear you kept up with the SC Mustang.

DarrenCT

hey jon, that car is

1. NOT stock......and/or
2. dyno is not correct....

given this, i know we all give you shat on your "kills" from time to time, so here's a perfect opportunity for you ....

go to the strip, post your times..

I believe Chappy still holds the fastest 1/4 stock 208/55 time, his #'s are in line w/ "stock"+ he's a pretty good driver.......that kind of power will best those times.....

if those are real, shut us all up....

very strong if they are....<thumbs up>

Jons95c36amg

The guy who dynoed my car i questioned him for awhile. To almost being annoying. I just couldnt believe the #s. So maybe its off by 10whp. Another guy who had a 04 350z 6spd single turbo 7psi boost. We were neck and neck Did this couple times same outcome. At the drag strip he ran a 12.8@111. My car is stock which is hard to believe.

Nachtsturm

My clk put down 263whp on the dot. On a dyno dynamics. I think there is a link in this thread to it.

Sorry to say there is no chance the car is making that much power. Others have trapped the 108mph range with their stock circa 300whp on a stock dyno jet.

I say the car is strong but the dyno readout is incorrect.

Even after my preliminary tune from Eurocharged, I made no where near that kinda of power.

Theoretically, if those numbers are true and say he is capable of a 110mph trap. That means my car down 70whp should be trapping 103ish.

We will find out soon. I am going to the drag strip this sunday.

AMS Performance

263-270 is normal for W208 CLK55s, 270-280 is normal for W210 E55s on DD dynos. For the record I'm pretty sure Chappys best run was on a stock car but if I'm not mistaken it was on 275 tires (which may have helped). Maybe he can chime in to confirm (still very impressive numbers). Saying you can do a 110mph trap and actually doing it are two different things, and comparing to a turbo 350Z is apples vs. oranges debate because the shape of the powerband is totally different.

The good news is the W208 CLK55s are one of the lightest 55 AMGs ever made so its easy to make these cars go fast as long as you can get good grip off the line.

da_guitarist

I'd say those #'s are already corrected crank power and not engine power. Could this not be the case?

Jons95c36amg

Ok guys explain this.. I know this guy with a 01 Pont WS6 6spd.With just catback it dynoed 305whp. I walk him easy from a roll. That car is about the same lbs as my Clk55.

AMS Performance

That's what I'm beginning to think... I just did the math, If the dyno operator tried to compensate for 18% for crank HP (which is probably what he thought is the right number but its not), that would put his wheels HP right at 269HP at the wheels, which is exactly where the car should be for a stock W208 CLK55. Some DD dynoes do this at customers request, but honestly they shouldn't as it totally invalidates the numbers and defeats the whole purpose of going with DD dyno.

If you are to recorrect the 269HP "DD #" for 22% drivetrain loss (which is what its supposed to be for our AMGs), it comes out to exactly 344HP which is again exactly where the engine should be of that age & setup. Either way, 269 is still a very strong number and is higher than the two 263HP numbers listed, which is probably accounted for by its relatively low mileage so he's up a few HP compared to other motors, he may just have a naturally strong motor. Also, remember that AMGs are deceptively quick, so you can still beat some pretty quick cars with lower HP numbers so its very hard to compare these AMGs to other cars in the real world since they outperform their "paper specs" much more so compared to other cars which are typically over rated from the factory (especially domestics). Gotta love those AMG engineers .

I think we have all finally figured it out . Just putting it politely. I noticed power loss when I tested MAF screens removed and these AMGs just hate it when you do that so it immediately went back in, certainly not 15HP gain I can assure you that, not to mention part throttle response was pretty bad. Remember, High flow 2nd cats pick up only 10HP on DD dyno, and they are terribly restrictive, so a small little plastic screen making 15HP is a stretch.

Hope that helps Jon, either way 269 is still a great number to be proud of.
~AMS~