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New Edge Cobras
Knock Sensors and Wheel Hop vs. Timing
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<blockquote data-quote="Reggie" data-source="post: 3780051" data-attributes="member: 4266"><p>Yes, it is possible to "turn the knock sensors off". There are a couple of ways actually. But, you have to be aware of a few things.</p><p></p><p>One way to turn them off is by a switch under scalars. It is much like the method that the rear O2 sensors are turned off. </p><p></p><p>Another is engine temperature related. There is a threshhold at which the EEC looks for to begin using the knock sensors to change timing. Setting this higher than the engine's operating temperature will disable the sensors.</p><p></p><p>The third is to populate the knock sensor advance and retard rate tables with all zeros.</p><p></p><p><strong>When setting a knock sensor equipped car's timing tables up for best performance, a tuner must take care to populate the advance rate tables with all zeros.</strong> When the EEC sees no reading from the knock sensors in the stock tune, it will <strong>ADVANCE</strong> timing. If a tuner sets up timing to be higher than stock in other areas (borderline knock table) and neglects the advance from the knock sensor tables...it is possible to see advanced timing beyond what is being commanded in the borderline table. That is one little way to add some unforseen timing and possibly make something go pop. </p><p></p><p>-"03Steve" under Reggie's screenname-</p></blockquote><p></p>
[QUOTE="Reggie, post: 3780051, member: 4266"] Yes, it is possible to "turn the knock sensors off". There are a couple of ways actually. But, you have to be aware of a few things. One way to turn them off is by a switch under scalars. It is much like the method that the rear O2 sensors are turned off. Another is engine temperature related. There is a threshhold at which the EEC looks for to begin using the knock sensors to change timing. Setting this higher than the engine's operating temperature will disable the sensors. The third is to populate the knock sensor advance and retard rate tables with all zeros. [B]When setting a knock sensor equipped car's timing tables up for best performance, a tuner must take care to populate the advance rate tables with all zeros.[/B] When the EEC sees no reading from the knock sensors in the stock tune, it will [B]ADVANCE[/B] timing. If a tuner sets up timing to be higher than stock in other areas (borderline knock table) and neglects the advance from the knock sensor tables...it is possible to see advanced timing beyond what is being commanded in the borderline table. That is one little way to add some unforseen timing and possibly make something go pop. -"03Steve" under Reggie's screenname- [/QUOTE]
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Knock Sensors and Wheel Hop vs. Timing
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