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Old 08-07-2017, 01:16 AM   #8 (permalink)
cRiPpLe_rOoStEr
It's all about Diesel
 
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Quote:
Originally Posted by Old Tele man View Post
I was alluding to the fact that with the engine computer controlling the turbo waste-gate dumping of 'excess' air pressure, the engine effectively becomes a quasi-variable compression ratio device, and where "suitable grade" meant the octane value of different fuels.
Indeed. But anyway, direct injection does increase the ability of an engine to avoid knocking while using lower-octane fuel with higher compression.
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