This was discussed extensively at mbworld before this forum was created. Several people purchsed the Upsolute chip. One person promised to do extensive befor and after dyno and track testing, and apparently did. He refuses to discuss the results. Two people posted before and after dyno runs. The claime 30 hp gain was a transient spike very near the redline. Over the entire rev range the hp increase was less than 4 hp.
Over nine months ago, GIAC promised a chip would be available in a few weeks. We have yet to see it and they are unresponsive when questioned about it. Powerchips of Australia claims a 30 hp increase for the SLK230k, but no gains for the C230k! I have become very sceptical of the benefit of chip tuning for the 230k engine.
The only one I might believe is Renntech. The have connections to AMG, and might be able to do a chip that is more than just hype. However, they have yet to publish any dyno results, and the chip costs $1600.
Over nine months ago, GIAC promised a chip would be available in a few weeks. We have yet to see it and they are unresponsive when questioned about it. Powerchips of Australia claims a 30 hp increase for the SLK230k, but no gains for the C230k! I have become very sceptical of the benefit of chip tuning for the 230k engine.
The only one I might believe is Renntech. The have connections to AMG, and might be able to do a chip that is more than just hype. However, they have yet to publish any dyno results, and the chip costs $1600.