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2013-14 Shelby GT500
How does ecu know to add timing
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<blockquote data-quote="VNMOUS1" data-source="post: 16649144" data-attributes="member: 36794"><p>There is knock sensor retard and knock sensor adder. Values are assigned by the calibrator. The increments in which it can add/retard as well as the time it takes to perform the task are also assignable.</p><p></p><p>It has nothing to do with your base borderline knock (spark/timing) table.</p><p></p><p>Factory cal only retards ONE degree regardless of the amount of knock. There's also Piston Protection which is an additional table to use.</p><p></p><p>Every car will knock at the hit with a PD blower. Once that initial shock is over, if the base table is somewhat conservative and the adder is on, it will add x amount of timing every x seconds up to the assigned limit.</p><p></p><p>However, you should set retard to pull more timing and more quickly than the adder can do its thing.</p><p></p><p>If you are halfway through the pull and the smallest amount of knock (real OR false) occurs, it will pull the assigned amount and won't add again until the time assigned has passed.</p><p></p><p>If I have a car that isn't knocking in peak Torque, only up high where stuff gets buzzy, and we've physically determined there's no detonation, then I'll put that timing in the base table and not use the adder at all since it wasn't able to do its job when a dipstick tube rattled on a header primary (or some other obnoxious issue)</p><p></p><p>Hope this helps clarify </p><p></p><p>Sent from my SM-N975U using Tapatalk</p></blockquote><p></p>
[QUOTE="VNMOUS1, post: 16649144, member: 36794"] There is knock sensor retard and knock sensor adder. Values are assigned by the calibrator. The increments in which it can add/retard as well as the time it takes to perform the task are also assignable. It has nothing to do with your base borderline knock (spark/timing) table. Factory cal only retards ONE degree regardless of the amount of knock. There's also Piston Protection which is an additional table to use. Every car will knock at the hit with a PD blower. Once that initial shock is over, if the base table is somewhat conservative and the adder is on, it will add x amount of timing every x seconds up to the assigned limit. However, you should set retard to pull more timing and more quickly than the adder can do its thing. If you are halfway through the pull and the smallest amount of knock (real OR false) occurs, it will pull the assigned amount and won't add again until the time assigned has passed. If I have a car that isn't knocking in peak Torque, only up high where stuff gets buzzy, and we've physically determined there's no detonation, then I'll put that timing in the base table and not use the adder at all since it wasn't able to do its job when a dipstick tube rattled on a header primary (or some other obnoxious issue) Hope this helps clarify Sent from my SM-N975U using Tapatalk [/QUOTE]
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2013-14 Shelby GT500
How does ecu know to add timing
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