This site describes F1 direct injection scheme; looks like stratified charge with a pre ignition chamber. An injector in both chambers.

<http://www.enginelabs.com/news/f1-tech-what-is-turbulent-jet-ignition/>

I neglected to report they claim  BSFC is 200g/KW/Hr with an F1 V6. I translated that to be .33

Robert LeClercq

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