Quote:
Originally Posted by BabyDiesel
I will be configuring the exhaust valve timing in the next few days. I will dive into the the Mazda Skyactive engines to see how the do it. IIRC a major contributor their engine running the 14:1+- CR was an efficient exhaust.
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Remember, it also has direct injection, which makes it less prone to pre-ignition in spite of the high compression ratio...