+1 on this. These 55s (and V12s for that matter) are the most f'ing complicated, random, secretive platforms I've ever dealt with. We know jack sh*t about them. Tuners expect us to just cough up money and pray they have it figured out, but they don't either. I don't care what tuner it is, even they don't know everything. There could be all kinds of changes year to year, software version to software version, parts to parts, R230 to W211 that we simply have no idea of because no tuner is going to divulge that information nor do people have the resources to investigate it independently. The 55 has so many platforms, from CL ro G-Class, and we don't really know what MBZ does to cater to each platform. Why does the G-Class have so much more torque? Cams only? Any updates for the '09 55 motor, or is it status quo?

Take the 4G63 motor found in EVOs and the DSMs (Eclipses/etc) - you better damn well believe that community knows every single god damned difference between every year engine. They know everything, every damned thing. We, by comparison, don't know jack. We can't even swap cams into our car and get it to run right. It's kind of pathetic really.

Sorry about the rant

-m

 

I learned the hard way that dyno numbers can be all over the place. I've seen dynojet numbers vary considerably from dyno to dyno, mustang dyno numbers also varying greatly from dyno to dyno, and lately even dyno dynamics numbers varying from dyno to dyno. I guess it all boils down to the chosen settings by the operator when they first setup their dyno. In the end, dyno numbers should really only be used for delta comparisons before and after mods.