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Message: <blockquote data-quote="t2ribena" data-source="post: 397056" data-attributes="member: 3847">bro...u champion la...ur ear can hear the knock as the knock sensor picks it up ar...but pls don't be so extreme la...the knock sensor has a sensitivity higher than our ears in the first place and the frequency response of the sensors goes beyond our hearing ability...our ear in perfect condition is 'designed' to operate from 20Hz to 20kHz but in real life it is way narrower than that and differ from person to person...the piezo sensor works at a far broader operating frequency and can pickup much higher freq pinking when the engine starts to pink and this allows the ecu to retard timing asap to avoid damage...so knocking in modern engine can go unnoticable with higher sensitivity and broadband sensors acting to avoid it from happening... also ur statement that the manufacturer does not test on the fuel they tuned the car for is totally untrue...they have to test it to obtain data to tune it to the optimum level...they cannot be just tuning it for the ron 98 without any data for the engine...do u also suggest company like panasonic makes the blender and rice cooker without actually testing to blend chillis or onions or cook rice dont you? just design it to blend and cook then pray it works?<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek!    :eek:" loading="lazy" data-shortname=":eek:" /></blockquote>

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