91ser

Hey all,

So I picked up a CLK55 that was not in running condition. It doesn't seem like an easy fix, and I think I just want to pull the motor and do a slow tear down. In the mean time, I want to get it back up and running. If possible, I'd rather just throw a 5.0 m113 (non-amg) into the car to get it up and going. If I did that, would I even need to swap ECUs? Couldnt I just swap the engine over and run it on the 55 ecu? Yes, I understand the cams/displacement are different so it might not be the perfect tune, but since its MAF based and going off of airflow anyway, Im thinking it might work? Worst case, I was thinking of taking the 55 cam and throw it in a 500 motor to pick up a few extra ponies, and would make the tune probably closer anyway.

Thoughts?

GatorMB

I would double check the firing order on both engines. If they match crank and cam grinds would be from the same forge.
If they do not match the 55 ECU will not work.
If they do match:
The final machining process will determine cam profile specs. The 500 engine valve size and springs might not yield the desired performance you are expecting to gain.
Hence a Cylinder head swap and major tear down on both engines.
I would focus on plug n play with the 500 and restore when the perfect 55 is found.
My 2 cents.

Gator

cm60k

If you not want to swap the 55 Engine, you can put the cam only, NO need to swap the ECU,

also, prefer to swap 55 diff. with TCU, cause 500 got "2.82", while 55 got "3.06",,

moreover; TCU from AMG has better shift point than non-AMG..!

-;ZAYED;-

91ser

Firing order? Its not like they did a different firing order for each m113. For future reference, if anybody is wondering, its 1-5-4-2-6-3-7-8. I am confident the 55 ecu will work, my main question is will it work great, or would i need a retune? My money is on a retune, however, the 5.0l would not make it as far into the maps as the 55, so it might be just fine.

Also, there is no need for a head swap, and this is pretty well documented. I'm sure some forum gurus can shine a little more light on this, but I believe both motors used the same part numbers for the valve springs and valves.

91ser

Right, as I mentioned, it would be the 5.0 going into the CLK55, so Id retain the same rear diff, transmission, and tcu. It would be only an engine swap.

I agree, the AMG transmission is a better shifting transmission. I will say tho, I am actually really happy with the 500s tune for the track. Although its not the best transmission for the road, it really does well on track. It holds gears until redline, it always keeps it in an aggressive mode, and it seems to usually be in the right gear. The instructor decided to point out he didnt like automatics right when he got in the car. A few laps in, and he actually made the comment that this wasn't an intrusive transmission on the track.

That being said, as mentioned, the transmission will be staying in the 55.

sick430

OK, let clear up a few points.

ALL M113's are the same minus the actual displacement. Yes, the AMG is built using better parts but its pretty much the same including the 55K, that is why you can swap them all around. Furthermore, if you go into the clk55 ECU there is even an option for the 55k although it was never actually put into the 208/209.

You are better off just finding a low milage 55 and swapping it in. other wise you will pay twice to pull and install the motors. The 55 is not that expensive.

91ser

Could you please clarify your statement? Because the 55k uses a MAP sensor instead of a MAF sensor for airflow. I was under the impression that for a 55k, you MUST have an ECU for that motor. If that isnt the case, can the clk55 ecu also control the bypass valve on the 55k?


Just so its clear, Id say there is < a 1% chance I'll buy another 55 motor to replace it with. Here is my reasoning

clk500 motor - $250-400 + shipping and tons of availability on ebay, 310hp + 55 cam = plenty of hp for my application

clk55 motor - $1500-2500 + shipping, a fraction of the availability on ebay


(This option Im still mulling over, havent made a decision yet, but if im spending $2500, it will be on this motor and NOT the 55)
e55 (55k) motor - ~$2,500+ + shipping, decent availability, much higher headroom for hp


Also, for clarification, I would be doing all the work. I don't have a problem swapping motors. I have the space, tools, hoists, ect. Im just missing a 2 post lift, but I can go to a buddys shop if needed for that. In fact, this would be my first engine pull on a Mercedes, and Im kind of excited for it. Call me crazy, but I feel like itll be easier than some other cars out there (like my 300zx, which was the biggest pita for...........anything)

megacrazy

He was trying to say that they use the same ECU. If you go into the ECU in SDS there are options for different motor configurations, including 55k. So yes, the ECU should work if it's configured correctly. I am not sure if it would run correctly without a proper tune, probably not.

91ser

I understand what he is saying, Im asking for further clarification tho. As I wrote, Ive always been under the impression that the clk500 and clk55 ecus are NOT able to be used with a 55k. The reason I was under this impression is the 55k uses a MAP sensor, not a MAF sensor to measure the incoming air. In addition, I was under the impression that the 500 and 55 ecus did not have the capability to handle the bypass valve for the supercharger.

Am I misunderstanding? Can anybody clarify? Can a clk500 and clk55 ecu run a motor from an e55 (55k)?

cm60k

I'm positively sure, 55 ECU will work perfectly with 500 Engine,

but if i'm not mistaken; ME2.8 N/A 55 won't work with ME2.8.1 55K Engine..!?!?!,

have to get 55K ECU and unlocked it by good tuner, to married it with your W209 Clk VIN,,

also, need to modify the SCN to W209 Clk, to make the ESP works properly with without SBC..!!

-;ZAYED;-

91ser

That is my understanding as well. Thx