help with predator handheld
12-19-2007, 07:12 PM
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help with predator handheld I just wanted suggestions on some of the parameters that can be tuned with the predator. With my mods what should i set the power enrichment to.........2k-4k. What should the spark be set to...1k-1.8k and wot spark 2k-7k. Any advice will help
12-19-2007, 07:21 PM
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It's hard to find Predator help around here, more hard core tuners around these parts. Try http://www.diablosport.com/index.php...viewforum&f=26
They may be able to help you out. Also, did you read the predator tuning help for trimming LTFTs? It's pretty good and is located here http://www.diablosport.com/index.php...display&pid=98
Torque Management
PLEASE NOTE: Disabling torque management will put greater stress on your drive line.
* TM Abuse Mode time limit:
This is the time in abuse mode as a function of temperature. Turning it off in conjunction with Upshift Torque reduction and %Torque Reduction vs RPM will eliminate torque management.
* %Torque Reduction vs RPM:
Torque reduction as a function of RPM, turning it off in conjunction with TM abuse mode time limit and upshift torque reduction will eliminate torque management.
* Upshift Torque reduction:
Torque reduction control for each individual gear, turning it off in conjunction with TM abuse mode time limit and %Torque Reduction vs RPM will eliminate torque management. However we have noticed that the shift feel when disabling the upshift torque reduction in trucks and SUV's is reduced and therefore recommend leaving it ON for trucks and SUV's.
Injector Slope
* Use to determine the injector size and also to correct the long term fuel trims. Injector change:
To properly set up injector size it is recommended that you multiply the current slope by injector % change.
Example: #24 to #30 (30-24) / 24 * 100 = 25% so multiply the entire slope by 25% to get you in the ballpark.
* Determining long term fuel trims:
Long term fuel trims are an accumulated value of fuel added or subtracted during closed loop operation.
To verify and tune for long term fuel trims, drive the vehicle for 30 minutes or until warmed up, monitor long term fuel trims and get an average value. The easiest way to do this is to get on the highway, enable cruise control and sit at 55mph while monitoring the data. Ideal values should be in the 0 to negative 2 range.
Once you get the average long term fuel trim value:
Positive long term fuel trims For a positive value you subtract that value in percent in the predator injector slope. It is also recommended to lean both fuel tables by the same percentage.
Negative long term fuel trims For a negative value you add that value in percent in the predator injector slope. It is also recommended to richen both fuel tables by that same percentage.
Once adjustment is done and tune installed, take the vehicle out and verify the long term fuel trims per previously described method. Adjust again if necessary.
Spark Adjustment
To properly dial in your timing using the Predator you need to log or monitor the following live data parameters.
Spark, this is your actual timing (in degrees) at any given time.
Knock Retard, this the amount of timing removed (in degrees) due to knock (detonation/ping). 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.
You basically 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.
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%. Make another wide open pass and monitor the same pids and basically keep doing this until you seen no knock retard.
NOTE: The use of respective grade fuel should be used with tune choice.
The 87 octane tune will run fine on 87, 89, 91 and 93 octane. 91 octane tune will run on 87,89 and 91 octane. The 93 octane (Performance) tune will run on 91 and 93 octane. If severe knock cannot be remedied by adjusting the parameters for it, try to install the factory tune and monitor the knock using it. If knock still is present consider switching fuel brand.
DiabloSport recommends using fuels from the following vendors:
Mobil, Sunoco and Amoco/BP.
They may be able to help you out. Also, did you read the predator tuning help for trimming LTFTs? It's pretty good and is located here http://www.diablosport.com/index.php...display&pid=98
Torque Management
PLEASE NOTE: Disabling torque management will put greater stress on your drive line.
* TM Abuse Mode time limit:
This is the time in abuse mode as a function of temperature. Turning it off in conjunction with Upshift Torque reduction and %Torque Reduction vs RPM will eliminate torque management.
* %Torque Reduction vs RPM:
Torque reduction as a function of RPM, turning it off in conjunction with TM abuse mode time limit and upshift torque reduction will eliminate torque management.
* Upshift Torque reduction:
Torque reduction control for each individual gear, turning it off in conjunction with TM abuse mode time limit and %Torque Reduction vs RPM will eliminate torque management. However we have noticed that the shift feel when disabling the upshift torque reduction in trucks and SUV's is reduced and therefore recommend leaving it ON for trucks and SUV's.
Injector Slope
* Use to determine the injector size and also to correct the long term fuel trims. Injector change:
To properly set up injector size it is recommended that you multiply the current slope by injector % change.
Example: #24 to #30 (30-24) / 24 * 100 = 25% so multiply the entire slope by 25% to get you in the ballpark.
* Determining long term fuel trims:
Long term fuel trims are an accumulated value of fuel added or subtracted during closed loop operation.
To verify and tune for long term fuel trims, drive the vehicle for 30 minutes or until warmed up, monitor long term fuel trims and get an average value. The easiest way to do this is to get on the highway, enable cruise control and sit at 55mph while monitoring the data. Ideal values should be in the 0 to negative 2 range.
Once you get the average long term fuel trim value:
Positive long term fuel trims For a positive value you subtract that value in percent in the predator injector slope. It is also recommended to lean both fuel tables by the same percentage.
Negative long term fuel trims For a negative value you add that value in percent in the predator injector slope. It is also recommended to richen both fuel tables by that same percentage.
Once adjustment is done and tune installed, take the vehicle out and verify the long term fuel trims per previously described method. Adjust again if necessary.
Spark Adjustment
To properly dial in your timing using the Predator you need to log or monitor the following live data parameters.
Spark, this is your actual timing (in degrees) at any given time.
Knock Retard, this the amount of timing removed (in degrees) due to knock (detonation/ping). 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.
You basically 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.
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%. Make another wide open pass and monitor the same pids and basically keep doing this until you seen no knock retard.
NOTE: The use of respective grade fuel should be used with tune choice.
The 87 octane tune will run fine on 87, 89, 91 and 93 octane. 91 octane tune will run on 87,89 and 91 octane. The 93 octane (Performance) tune will run on 91 and 93 octane. If severe knock cannot be remedied by adjusting the parameters for it, try to install the factory tune and monitor the knock using it. If knock still is present consider switching fuel brand.
DiabloSport recommends using fuels from the following vendors:
Mobil, Sunoco and Amoco/BP.
