M54B30 manifold swap on M52TUB28 How To

invalid@example.com (MisterP007), MisterP007
Tue, 20 May 2025 15:17:22 +0000

A couple of people who know I have done this once already and planned to do it again on the 250 Cal, asked me to write up a how-to. So here it is:

First Question

Why bother?

The M52TUB28 was artificially restricted in it's breathing ability by BMW. Why? Well, rumours abound:

The 2.8 had to be kept below 200bhp for German Insurance / Company Car reasons - I have never seen any real evidence for this.

BMW knew that they would add the 3.0 engine to the Z3 with 231bhp on...

M54B30 manifold swap on M52TUB28 How To