Knock retard
Posted: Sat Aug 01, 2009 1:32 pm
What is the relationship between knock retard and knock level?
First, I'd like to point out that there is absolutely no knock at WOT at vtec with its AFR running 13.5-13.0 at 5-7.5k rpm and AFR 12.5 at 7.5-8.5k rpm. Is this the optimum AFR for 93 RON fuel on a JDM FD2R?
How much knock retard before a K20A engine is hurt? e.g. T.pedal 25-40%, AFR 14.0-14.5, 2500rpm, VSS 70kph, 5th gear with knock retard=8 Is this a concern? What is the solution? reduce ign timing and run richer at 13.5 AFR?
Your input would be greatly appreciated.
First, I'd like to point out that there is absolutely no knock at WOT at vtec with its AFR running 13.5-13.0 at 5-7.5k rpm and AFR 12.5 at 7.5-8.5k rpm. Is this the optimum AFR for 93 RON fuel on a JDM FD2R?
How much knock retard before a K20A engine is hurt? e.g. T.pedal 25-40%, AFR 14.0-14.5, 2500rpm, VSS 70kph, 5th gear with knock retard=8 Is this a concern? What is the solution? reduce ign timing and run richer at 13.5 AFR?
Your input would be greatly appreciated.