Quote:
Originally Posted by dmboone25
T. No internal upgrades. That engine can't make more than 365 horsepower reliably without significant upgrades.
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The regular N55 is VERY capably of making significant horsepower upgrades, reliably, on the stock internals.
Don't confuse the issue.
The regular N55's turbo size is a limiting factor in making power on a tune.
The M2 has a significantly upgraded "N55", if you can even call it that. It's essentially a different engine, with it's new block, rotating assembly, etc.
That is hardly the same thing as saying the standard N55 is a weak engine. To the contrary, it, like the N54...is a notoriously strong/reliable powerplant.
There's a big difference between calling an engine unreliable at certain power levels, and saying an OEM chose to make upgrades to a certain engine as it upped its output. Maybe consider your words more carefully?
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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)