Quote:
Originally Posted by M3 Adjuster
- The literature from BMW described the new turbo and wastegate design
@Nine lives posted the entire info in this thread and it raged into closed deck but the key is
" M2s turbocharger is integrated into the exhaust manifold "
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All N55 turbos are integrated into the manifold.
Edit, covered above.
Quote:
Originally Posted by M3 Adjuster
- the Dyno chart post by BMW shows a higher revving top end
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That's perhaps more telling. The standard N55 turbo is seriously running out of steam early in the rev range.
Quote:
Originally Posted by M3 Adjuster
- finally , test drivers are referring to the better, snappier throttle response
I'm sure some will continue to doubt reality until a tuner says something or we see the parts side by side  :
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?
But you wouldn't have both. If the turbo is larger, it would have more lag, and slightly worse throttle response.
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'02 S54 M3 (500/500 GC/Koni)
'08 N54 135 (JB4, DCI, BMW PS/Bilstein B6s, H&R M3 FSB, Strongflex FCABs)
'14 N55 X1 (JB4, BMS DP, BMS Intake, Alpina TCU reflash, H&R Sports, Bilstein B6s, E93 M3 RSB, Strongflex FCABs, baby seat)
'08 N54 535xi touring (Bilstein B6s, Downpipes, MHD tune, baby seat)