Originally Posted by HDDP
Just my semi-educated opinion (and that of the Bosch Engineers) as mentioned in other threads... In laymans terms, you can dump more gas or more air, or both into this engine and it will not produce noticable HP gains because the Bosch ECU / PCM and sensors are programmed to maintain stociometric AFR... So, the timing will be retarded, fuel will be trimmed to keep it there...
Until you manipulate (tune) the ECU to override the OEM programming, you'll be pissing in the wind...
I'm surprised you guys haven't been searching the earlier threads regarding this issue...
That's why I bust ***** when people start talking about intakes, exhaust, etc. to make more HP in this car, without thinking about the Engine Management Systems that control it...
Well I guess dumb luck (all on my part) might just work out to my advantage. I choose to wait until I could purchase all the mods at one time with the last mod being the ECU tune.
I hope that my dumb luck (and a set of headers I found will arrive before the Thanksgiving weekend) will work out for optimum performance gains.
So many 3.2L Supercharged owners on the other MB forums including a few I have spoke with on the phone with this week said the stock SL55 AMG V8 intake system has helped with this engine's performance.
Thanks Shawn for your effort posting your results.
HDDP - what shop do you recommend for Engine Tuning?