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Message: <blockquote data-quote="astroboy" data-source="post: 362257" data-attributes="member: 4527">hehe.. no pro here neither.. just another keyboard warrior that find internet forum more fun then anything else because u can't Karate kick me for saying something wrong.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue    :p" loading="lazy" data-shortname=":p" />My mini VVTi MPV is recommending RON90+. So yes, it has knock sensor. Whether how advance timing I need is none other that ignition at max stroke extension. Should not be a difficult task for the ECU.... and yes, we are through with compression ratio vs RON and we agreed that compression ratio is just one of the contributing factor for detonation other than temperature, moist density in air etc. But I think its a joke to run RON90 with a compression ratio 10:1 engine and claim it will not detonate. Yes? No?..and Schwepps has given us evidence (as always) that Vee-P is similar RON to Premium. So its no longer a question of detonation or RON related question.Leaner combustion? O2 sensor detecting it and extend fuel injecting time? FC up? power up? More energy release = greater energy transferred to the spinning wheels? or just end up in the coolant as excess heat absorbed away.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue    :p" loading="lazy" data-shortname=":p" /></blockquote>

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