Quick adjust parameters do not require a reflash to take effect, they require a key cycle, these parameters are available in a separate “Quick Adjust” menu item as well as in the modify parameters menu. We recommend using fuels from the following vendors: Mobil, Sunoco and Amoco/BP. If knock still is present consider switching fuel brand. If severe knock cannot be remedied by adjusting the parameters for it, try to install the factory tune and monitor the knock using it. The 93 octane tune can only be used with 93 octane fuel. The 91 octane tune can be used with 91 octane or greater octane level. NOTE: The use of respective grade fuel should be used with tune choice. Make another wide open pass and monitor the same pids and basically keep doing this until you seen no knock retard. Monitor the spark and the knock retard pids under wide open throttle and see if you have any knock retard, anything higher than 1 should be adjusted in the respective timing range in the Predator, if the knock is severe, 5 deg plus, try lowering spark by 10%, if less than 5 deg, try 5%. You always want the knock retard to read zero under wide open throttle conditions, it is normal for it to show some KR when stomping on the throttle and also during the shift. The knock sensors can in rare cases pick up other harsh engine noises as well, if this is the case it is recommended to fix the cause of the noise before proceeding. Knock Retard, this the amount of timing removed (in degrees) due to knock (detonation/ping). Spark, this is your actual timing (in degrees) at any given time. To properly dial in your timing using the Predator you need to log or monitor the following live data parameters. Most of our provided tunes have already optimized the WOT spark values for peak power.Īllows user to adjust timing +/-10 degrees in the 1000-3800 rpm rangeĪllows user to adjust timing +/-10 degrees in the 4000-4800 rpm rangeĪllows user to adjust timing +/-10 degrees in the 5000-7000 rpm range This can be used to seek peak power on a dyno, or to adjust for spark knock or even to pull some timing for use with aftermarket N2O systems. Most gas applications allow the end user to make changes to the commanded timing at Wide Open Throttle (WOT).
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