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I have a question on any JDM engine. Currently I am having installed a ITR (B18C) engine in my 99 civic EX. My question is this. Since Japan runs on 100 octane for their high compression engines and California's highest rated octane is 91, how will my engine react to 91 octane. Will it be fine? Will it detonate? Will the knock sensor retard the timing soo much that the car is barely driveable to the fact that I cant rev too high or I risk blowing up the engine due to detonation? I can add octane boost but the most it will do is add one to two points to the rating. Should I be concerned or will it be ok. Any comments will be greatly appreciated. Thanks: :D
 
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