Originally Posted by Giampaolo84

Yeasterday i brought the car to the remap.
Sorry for my english, i'll try to explain what happened in a few words:
put the car on the dyno with the manometer on, at 5000rpm in V the K pressure was about 1.2bar and the car had the recovery signal.
Now we can say for sure that also the Crank has been changed by the previous owner... i'm thinking to take it off in order to finish the map!

Originally Posted by kimito

I am very interested in this discussion. I have a c 180K M271 so I suppose the SC pulley is 72mm and the crank pulley is 175mm.
I want power up my SC so as I understand is I have to do a 65mm SC pulley and keep the 175m pulley. Of course I have to improve the IC and do the remap. Am I right?
on the other hand what about changing the fuel pump? what is the fuel original fuel pressure?

Originally Posted by kimito

If I go for option number 1 the pulley should be of 65mm? The intercooler which one I need? Does a universal one with the piping on each side be fine? The remap and that's it?

Originally Posted by gogos

You can also make custom set modyfing the OEM crank pulley. Details on the foto:

Originally Posted by kimito

Making the crank pulley I've got to change the ic as well I suppose. Is it more reliable for the sc life this option? What would be the boost pressure? On the other hand I've been searching for the headers, sometime ago a saw obx headers but now I cant find them. On the other hand, I just for my curiosity is there anyone who has turbocharged our motor?

Originally Posted by Yolka

Dear SergeSLK, i've tried to find DAMOS for sim4lke, and found than no one wants to share it for free. I've found it only in one place and the price was near 250$, what is too much, i think.

And now I have a question, may be it is possible to make ECU remap with MB StarDiagnosis?

Originally Posted by gogos

Hello from Greece. After two years of studding EATON MP45, the SC on the MB M271 motor, I decided to make an effort to improve its characteristics. The Specific SC is positive displacement type roots 45ci or 750cm3 of air per revolution. The SC type roots, are the most inefficient because first they consumed about 25hp from the engine at 15.000rpm (imagine what the DRAW 22.000rpm) and second after that speed limit the air due to compression gets very hot, with known negative effects on engine performance. This is why the AMG monsters are using "twin screw", and no "roots". Finally, MB saw the competition and turned at last to turbo.
In USA, where the SC is a must in tuning, there is no serious improving the MP45, and I had to start from scratch. After seeing many-ported SC I decide to do some porting work, ie opening the exit port, normalization and polishing the air intake on the back and closing the four holes of air relief. For the holes, I did not use jb weld or so but I make cups from aluminum. In order the cups to stay in place I cut pieces of industrial rubber plate 10mm thickness and fill the holes in both sides of the sc exit, as you can see in the pictures.
Let us see in what rpm the EATON rotor spins, from OEM until the upper limit it can spin with custom crank - sc pulley:
1. Crank 175mm / supercharger 72mm = 2,43 gearing X 6.200rpm = 15.100 (All the 163hp with the 2080, 2180, 2380 etc.
2. Crank 175mm / supercharger 65mm = 2,69 gearing X 6.200rpm = 16.700 with the 184hp and 192hp with the 2780
3. Crank 175mm / supercharger custom 62mm = 2,82 gearing X 6.200rpm = 17.500
4. Crank 195mm/supercharger 65mm = 3 gearing X 6.200rpm = 18.600 (Kleemman)
5. Crank 195mm / supercharger 62mm = 3,14 gearing X 6.200rpm = 19.500
6. Crank 195mm / supercharger 65mm = 3 gearing X 7.000rpm = 21.000
7. Crank 195mm / supercharger 62mm = 3,14 gearing X 7.000rpm = 22.000 which is the maximum you can spin the MP45 in M271, because there is no space for other pulley combination. For the limit of 22.000rpm will need several interventions in functionality, such as oil cooling system for the oil in the snout drive gears and lighting the rotors by 30-40% in order to reduce parasitic losses and affect the reliability of as much as possible.
First a 2080 MP45 was selected, a 62mm pulley was placed and apart from the work of porting it was partially rebuilt: the coupler was replaced, the oil was changed, the housing has been polished inside with special OINTMENT Unipol, the o-ring filler cap was changed and also the special grease blue color Beveroil (Lilac) inside the back bearing.
In order to replace the front bearings of the rotors you have to take them apart and it is very difficult to put them together because you need special timing machine to reinstall them properly. I would not recommend someone to dare. The opening of the air outlet was made on a mill and the polishing by hand and custom made flexible with long nose to polish the most part and not hurt the inside of the housing where the rotors are turning and damage the SC.
The SC was spinning for 7 days at 21.000rpm and then "caboom". Second attempt with another 2080, was also end in 7 days with another broken SC. My conclusion is that the 2080 cannot spin more than the 19.500rpm. When opened, the drive gears were destroyed.
Third attempt was made with a 2780 from C230 which use a spring for the rotation and not the plastic coupler, which is spinning many months now without problems.
Spinning the SC more than 19.500rpm causing too much stress and high temperature inside the snout and the SC brake down. To avoid facing the problem it should be installed a closed-circuit oil cooling system in order to reduce the temperature and avoid the heat to be transported to SC body. This system will work with a low flow fuel pump, an oil cooler, an expansion tank, a relief valve and some hoses.
Below are some photos of the project. I opened this topic for those interested to know about and to exchange ideas and thoughts, which are welcome.
Those who wish to enter the above procedure should know that no one could give warranty to a mechanical assembly, which rotates 5.300rpm more than the maximum limit, according the manufacturer.
The SC is on two SLK200K giving a gain of 8RWHP. The boost rise to 1,15bar making 199RWHP at 6.700rpm, on a Mustang dyno. Also a 5bar fuel pressure regulator, 195mm crankshaft pulley, bigger IC, improvement of air supply piping, headers, free flow catalyst and a remap of the ECU by a tuner who has the DAMOS files of the SIM4LKE, is the only way.
The last problems I am working on, is:
1. the MAF limits out at 180g/sec and doesn't allow the pressure to rise more opening the bypass valve, even I have try bigger MAP. Attempts of changing or decaling the MAF heart idle and performance.
2. does anyone know how I can merge the wiring of the throttle body connector in order to put the throttle body of a SLK350 which is bigger? In "autodata 3.38' the wires are different as you can see in the photos.
Any ideas will be appreciated.
PS: Sorry for my English.

Originally Posted by kad-1

Hi team.
I have a question for my 271 engine with M65 supercharge.. Can I ported it? if yes, I have to remap?
I have 2006 MB, C180 Kompresor W203, Engine 271.

Originally Posted by kad-1

any answer? help..Can I port my m65 SC.

Originally Posted by gogos

The s/c pulley is 65mm if you have the C230K. The outer diameter is 70mm and I think this is what you have mesaure. In order to measure right you must take out the belt. If you do so then you will measure 65mm. The smallest s/c pulley that can be placed is 62mm it is a custom made be me. The crankshaft pulley is also a custom made by me. Only Carllsson and Kleemman makes them but the prices was very high. The 62mm s/c pulley cost me 100$ and the 195mm (200mm outer diameter) crankshaft pulley cost me 250$, because you have to make also a smaller pulley 120mm for the water pump and to buy another belt 7PK2465 or 7PK2470.
Before you put any pulley on you engine, find a tunner that can remap the ECU. No remap no any Hp gain. Your engine puts out 192 Crank Hp at 0,9bar. The factory map reads only 1bar so I dont think that you need any pulley. You need a remap from a tuner who has the damos files of the SIM4LKE in order to be able to rise the boost and to change the A/F ratio and to see some good Hp gain.