M54b30 Engine tuning

BruceB

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Uk
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BMW 330 e46 coupe
Hello.
New to this forum, planning major upgrade work to a m54b30. Has anyone here fitted the early inlet manifold non VTT. Any benefits? Planning a big valve ported head with balanced bottom end soon. But looking at options for the inlet manifold, don’t really want to go down the throttle body route.
Thanks Bruce.
 

obi_waynne

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Deal, Kent UK
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A3 1.4 TFSI 150 COD
Hello and welcome, it sounds like a great project, please keep us posted with your progress and thoughts, I know a lot of people will be reading this thread with interest.

The S50/M50 and S52 manifolds seem to be swapped in on this motor quite a bit. Which one are you looking at fitting?

What's up with the stock manifold, a lot of guys fit these to the earlier engines as they flow really well.

I can understand you wanting to avoid the popular DISA throttle body setup.

Personally I'd focus on the head and some cam profiles to suit the new flow characteristics for better top end.
 

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