Quote:
Originally Posted by efnfast
Ok, at stock compression 91 is fine. I carry octane booster with me in case I can't get 91 or better
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The short answer is, YES
(1). By the grace of advanced computer controlled FI, the computers and developments through the 70s and 80s,
our cars have the agility to safely operate our 11:1 compression motors on 87 octane if it has to. IOW, the motors, thanks to modern computer processors and sensors, will operate in a much wider range of octane availability than in engines would in the days of carburetors and distributors (
including running compression ratios at "nose bleed" levels (compared to the old days when lead free fuel was introduced).
Put simply: with active sensors and control, our motors will run at peak performance when high octane is available, but the computer will back off (timing primarily) if knock is detected as result of lower octane fuel.
(1) "Corvette Fuel Injection & Electronic Engine Management" by Charles Probst.