harddrivin1le
Active Member
- First Name
- Pete Shea
- Joined
- Jul 27, 2019
- Threads
- 0
- Messages
- 30
- Reaction score
- 16
- Location
- Southern New England, USA
- Car(s)
- 2018 VW GTI Autobahn
Why doesn't the highest output B58 variant (S58, as used in the M3/M4) use "the better more efficient design?"There is no point with the 6 port manifold. B58c has a sort of inbuilt (into engine block) manifold to 2 ports, so both ports can connect directly to the twin scroll turbo. It is actually the better more efficient design...
And why would BMW even bother with the 6 external port configuration if they could simply crank up the boost (as so many 2020 Supra owners do through "tunes") to achieve the same and even higher output levels?
Source: BMW Tech training manual
https://www.bimmerpost.com/goodiesforyou/docs/ST1926-S58-Engine.pdf
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