06-07-2020, 09:06 PM
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#13
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Join Date: Oct 2003
Carmudgeonly Ride: '11 1M
Location: Churzee
Posts: 17,741
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Quote:
Originally Posted by Nick M3
So, the answer today is that S54 swaps are very easy.
The Rogue wagon, IiRC, involved an M3 body kit, which is a much bigger issue.
The absolute easiest direct drop in answer is an M54B30, which is straight plug and play. Doesn’t even require any reflashing.
Ain the past, the issue with S54 swaps was that people had not cracked the ECU, so they were doing crazy shit like retrofitting E46 M3 chassis harnesses and modules. Now, you can just turn all that crap off and you can still get it to scan for OBDII inspection.
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That makes sense. Thanks for the info!
Quote:
Originally Posted by Nick M3
Bonus: High RPM S54 reliability is a lot better than people thought it was. It’s reasonable to set the rev limiter to 9,000. No, that’s not a typo. Yes, the S54 makes power all the way there with an OK exhaust.
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It must have very robust apex seals. 
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2011 1M
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