SLK-Class (R170) 1998-2003: SLK 200, SLK 230K, SLK 320

SLK/R170: MB 230 kompressor with 15 PSI at intake manifold

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Old 10-16-2016, 01:47 PM
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MB SLK 230 year 2000/05 facelift
MB 230 kompressor with 15 PSI at intake manifold

Hello.

Today I have ECU remapped my MB SLK 230 kompressor facelift year 2000/05. ECU modell is the OEM Siemens SIM4LE. I have used Galletto 1260 to read and write the ECU files to the car.

Modifications to the engine is as below:

1) 420cc Siemens fuel injectors (OEM is 295cc)
2) Intercooler 600*300*76mm
3) 3" Intercooler piping
4) 4" CAI with ITG foam filter instead of fog light
5) Ported Eaton M45 SC
6) Custom SC inlet manifold
7) Bosch 74mm Throttle Body
8) modified throttle body elbow for the larger throttle body
9) Clamped MAF + MAP with 4,3V zener diode
10) 2 steps colder spark plugs (NGK BKR8E-11)
11) Stainless steel exhaust manifold
12) 2,5" Stainless steel cat back exhaust with deleted middle resonator


ECU remap with mods as below:

1) Torque limiter removed
2) RPM limiter raised to 6200RPM
3) Boost limiter removed (OEM limiter is 0,8 bar or 10-11 PSI)
4) Changed A/F ratio, after remap WOT is 10,8 A/F ratio
5) Advanced ignition timing
6) Optimised for 98 octane fuel (highest octane in Sweden)

The engine pulls all the way to the rev limiter,and around 7 PSI at 2500RPM, and 10-11 PSI at 4500RPM.

Next modification this winter will be a custom made aluminium inlet manifold to the engine and a Bosch 82mm Throttle body. And ported engine head.

I hope and think all mods after the winter projects will give the engine around 300 BHP at the crank. Today after ECU remap I would estimate 260-270 BHP at the crank.

Hope this tread can give some good information to all that like to modify there engines with more than just a crank pulley.

I also like to thank Subby and Steve Jonsson for all great posts, that I have read before I started to modify my Mercedes M111 EVO engine.

/Fredrik
The following 2 users liked this post by Fredrik Nyström:
alex jones (06-11-2021), LUIS RAY (10-29-2019)
Old 10-29-2019, 03:27 AM
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W211 E55 AMG / R170 SLK 230K / Porsche 996 Turbo S
Hi, How did you fit 74mm bosch TB to M111?
I'm trying to upgrade my stock TB to 74mm.

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