Quote:
Originally Posted by Maverik259
What's really main performance difference in the S63 compared to the N63? Is it just the larger better turbos? Or is there something else? Again just strictly speaking power increase. Not like more durable parts in the engine bay. Obviously that goes without saying in an M. At least it better for that price difference.
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AFAIK S63TU has a bit larger turbos (but not overly so), larger Intercoolers and a crossbank intake, different oem tune obviously.
We can also look into possibility to swap X5M intercoolers or ones from M5 maybe. Another even cheaper option is to install meth kit - it will lower IATs even more than bigger intercoolers (plus will raise octane to allow for more timing - which will yield more power gain). Also, heard that meth cleans valves and pistons - especially needed for our direct injection engines - but not sure how true it is.