marinetec Posted March 23, 2019 Report Share Posted March 23, 2019 seadoo rxp-x 260 rotax 1503 turbo setting knock setup Question. 1. freq channel: 6kHz Narrow band cy1 knk level gain 0.65 cy2 knk level gain 1.50 cy2 knk level gain 1.50 2. freq channel 10-16kHz-wide band cyl1 knk level gain 1.00 cyl2 knk level gain 0.80 cyl3 knk level gain 1.00 Which of the two settings is correct? Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 24, 2019 Report Share Posted March 24, 2019 Either could be. You adjust the gains so that you see equal knock levels reported on all cylinders. Typically the cylinders that are further away from the sensor need higher gain so I would say if the knock sensor is somewhere near the centre of the engine on these then the bottom set of gains look more like what I would expect. The best frequency for knock detection can be biased by many modifications so what works well for someone else may not be right for you. For instance hanging a different turbo/manifold off the side of an engine will usually change its knock signature. marinetec 1 Quote Link to comment Share on other sites More sharing options...
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