Hi, there. Can you tell me how can i recognize a 5000 engine and a 5500 aspirated engine, if i just popup the hood? There are some difrence betwen those 2 aspect wise?

 

See the attached photo, this is on the top/side of the intake manifold upper, right next to the fuel rail. Besides the bigger oil cooler, there are not many other ways to easily distinguish between the two motors

i know the injectors will typically be a different color, indicating they flow more than the 500 injectors. I think the 500 injectors were orange, while the 55 AMG injectors were more tan/almond color

 

Today I had a remote ecu tune installed to match this engine swap finally. I got a great deal from a company called V-Tech from the country of Georgia, I tried to spread the word about the sale here but mbworld admins deleted my posts annoyingly enough because they weren’t “sponsored vendors”, so sorry folks but I tried

anyways. They installed a base tune for the 2002 n/a 55 AMG engine, and I felt it was important to share because while I’m not the first or only person to swap from 430/500 m113 engine to 55 AMG engine, I’m one of the first to discuss the long term ownership, the matter of having the engine tuned, the matter of engine compression tests after so many years, etc

there are 3 main things I noticed since I got the tune today -

1. Somehow the transmission seems to shift smoother. I’ll elaborate more on this in item number (2) but because the engine is more finely tuned, some of the “smooth mercedes luxury car” feel is restored. And I didn’t even think the car shifted rough at all with the stock 500 ecu tune on my 55 engine, but even with my accompanying tcu tune from months ago(tranny shifts faster now, the tcu tune makes it just slightly less smooth than normal), the shifts are absolute butter. I haven’t tried this new ecu tune my stock tcu tune but I can only imagine it’s smoother than butter

2. Throttle response seems to be improved to say the least. It’s sort of hard to explain but the engine is more responsive to throttle lift-off, perhaps it’s a bit “snappier” on acceleration too but I’m not sure yet. There’s definitely some sort of change for the better going on with the throttle “feel” and response now. Again, like item 1, this was never anything very noticeable at all before with the cl500 stock tune on the 55 engine swap, but driving now with the proper 55 engine map it’s one of the slight differences I noticed

3. Horserpower seems to be increased but if I’m not mistaken, the biggest change in power seems to be the torque, the car seems to move “easier” when putting around town in traffic. Now that I have a 55 ecu map to compare, it seems like I had to give more throttle in the past to get the car to move at the same rate at low rpm/in city traffic type driving

so overall, again I’ve had this engine swap for years now with no real problems, I have usually had no check engine lights(the occasional output speed sensor code etc) but one thing I did notice is far negative long term fuel trims on a live data scanner. Overall the car ran fine though. compression test even checked out good after years of semi-abuse. There was a noticeable increase in power when swapping in the 55 engine, with the old 500 tune still attached. But I feel this proper 55 engine ecu tune is giving me that last 10 horserpower a normal 2002 Cl55 would come with from the factory

soon I will again rent a live data scanner to see if my negative fuel trims are corrected with this 55 ecu tune, seeing the slight difference in driveability, for the better at that, leads me to believe that the old 500 tune for the 55 engine was quite possibly the cause for my negative fuel trims

i have some wideband sensors ready to install so I’ll also know more about what’s going on with the engine mixture as well. If the 55 tune doesn’t solve the negative fuel trims I guess I will need to investigate further into the fuel delivery system and maybe vacuum leaks? Good time to build or order a diy smoke machine ...

 

vacuum leaks are easy to detect with a vacuum line smoke detection tool

 

https://www.aliexpress.com/item/3298...chweb201603_53

 

Do you think a vacuum leak would cause negative fuel trims? I’m not sure because I remember reading these two bits of info

1. Engine ecu will compensate for vacuum leaks (it’s not like mine are huge leaks if they do exist)

2. Apparently vacuum leaks will present themselves as a positive fuel trim situation?

 

would like to help but i'm exclusively on v12's, seriiously never looked at a MB V8
would you need any documentation for your car just send me your vin and request in PM

 

thanks!

 

np

 

the verdict is in, im happy to report with the proper 55 n/a ecu tune, the long term fuel trims are hovering around 0. which is exactly where they should be

so the most definitive answer yet anywhere online - the 55 n/a m113 engine is plug and play swap into 500 m113 cars, it will work good just the fuel trims will be far in the negatives while the ECU does its best to cope with the change. besides a boost in power you'll get better throttle response too if you retune the ECU to match the new 55 engine

the upside to having these tunes on hand is that when i am sorting my upcoming turbo build i can try out different fuel/air maps to fine tune the build

worth noting - i went further and got the stage 1 cl55 tune from v-tech, the car is the fastest it's ever been n/a. I told them i debaffled the airbox/air intake elbow and the car has no mufflers/straight pipes otherwise. paired with the secondary o2 delete suggested by pmercury, the car is surprisingly quick for a heavy v8 car from 2002