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How does the anti-knock-system work? 700 1988

posted by  invar on  Thu Feb 27 09:05 CST 2003
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last visit: Fri Feb 26 21:00 CST 2010
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98 octane? Where are you located, and is that (R+M)/2 or RON or MON? (R+M)/2 is commonly referred to as AKI (Anti-Knock Index)? RON is Research Octane Number and MON is Motor Octane Number. R is usually greater than M, and thus I would suspect that 98 octane at the pump refers to the RON number? Curiosity beckons me to ask because in NYC, the highest octane I can get is... 93 AKI I believe. :)

As for the answer to your question, i would suspect that you are correct with regards to the shuddering. and i believe you are also correct as far as how the knock detection system works.
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'






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