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Originally Posted by ruff
Long time follower, first time poster. Forgive me for ignorance. One of the most informative sights I have seen. Anyone in the know or have educated guesses as to why no DI in this motor. Scott?? The N54 uses it. Word is P-cars are soon going to employ this technology to their high strung power plants. BMW talks about efficiency with this motor. Is there any hope for E46 M3 type mpg?
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The pictures of the S65 heads are not yet available but look at the heads of the S85..... No room.... They would rather use the plugs as near instant knock sensors.
Finally.... the atmospheric engines don't benefit as much as turbos from the cooling that DI offers.