DiabloSport technical support

Fan adjustments are used to command the fans to come on sooner for increased cooling or for use with a cooler aftermarket thermostat. In many of our provided tunes, we have already optimized the cooling fan settings for use with the stock thermostat.

Cooling Fans AC Off (DCX)

High MPH HS Fan On

High MPH High Speed Fan On when ac is off and above 8mph

High MPH MS Fan On

High MPH Medium Speed Fan On when ac is off and above 8mph

High MPH LS Fan On

High MPH Low Speed Fan On when ac is off and above 8mph

Low MPH HS Fan On

Low MPH High Speed Fan On when ac is off and below 8mph

Low MPH MS Fan On

Low MPH Medium Speed Fan On when ac is off and below 8mph

Low MPH LS Fan On

Low MPH Low Speed Fan On when ac is off and below 8mph

Cooling Fans AC On (DCX)

HS Fan On

High Speed Fan On when ac is on

MS Fan On

Medium Speed Fan On when ac is on

LS Fan On

Low Speed Fan On when ac is on

Most gas applications allow the end user to make changes to the commanded timing at Wide Open Throttle (WOT). 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 of our provided tunes have already optimized the WOT spark values for peak power.

WOT Spark 1k-3.8k:

Allows user to adjust timing +/-10 degrees in the 1000-3800 rpm range

WOT Spark 4k-4.8k

Allows user to adjust timing +/-10 degrees in the 4000-4800 rpm range

WOT Spark 5k-7k

Allows user to adjust timing +/-10 degrees in the 5000-7000 rpm range

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 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 91 octane tune can be used with 91 octane or greater octane level. The 93 octane tune can only be used with 93 octane fuel. 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. We recommend using fuels from the following vendors: Mobil, Sunoco and Amoco/BP.

The WOT fuel adjustment is used to adjust the commanded Air/Fuel ratio at Wide Open Throttle. This can be used in conjunction with a wide-band O2 sensor to dial in optimized AFR for peak power at WOT.

WOT Fuel 1k-3.8k

Allows user to adjust fuel +/- 20% in the 1000-3800 rpm range

WOT Fuel 4k-4.8k

Allows user to adjust fuel +/- 20% in the 4000-4800 rpm range

WOT Fuel 5k-7k

Allows user to adjust fuel +/- 20% in the 5000-7000 rpm range

Enables users to adjust the rev limiter, or maximum RPM the PCM will allow.

Rev Limiter in Drive

Allows user to adjust the rev limiter while in drive, adjustable up to 7000 rpms.

Rev Limiter in Neutral

Allows user to adjust the rev limiter while in park/neutral, adjustable up to 4000 rpms.

Allows the user to adjust the commanded idle speed.

Idle Speed in Drive AC off

Allows user to adjust the idle speed +/-400rpm in drive with the ac off.

Idle Speed in Drive AC on

Allows user to adjust the idle speed +/-400rpm in drive with the ac on.

Idle Speed in P/N AC off

Allows user to adjust the idle speed +/-400rpm in park/neutral with the ac off.

Idle Speed in P/N AC on

Allows user to adjust the idle speed +/-400rpm in park/neutral with the ac on.

Allows user to adjust or enable/disable the factory speed limiter.

This is used to calibrate the speedometer if you have changed to a different size (height) tire.

The inTune and Trinity offer 2 different options for entering the correct tire size for most applications.

The first method is by the sidewall numbers, such as 245/45-18. In this method, you’ll be asked to enter the width in mm (245), the aspect ratio (45), and the rim size (18), then apply that change to correct the speedometer.

The second method is by overall tire height. For best results, measure the actual height of the tire at operating pressure, and enter that value, generally in the 28”-36”+ range.

Either method will correct the speedometer for you. Keep in mind, if you have factory sized (or factory height) tires on the vehicle, there is no need to make any adjustment here.

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.

User will be asked to cycle key after each adjustment:

Traction control

Enable or disable the ESP (traction control), NOTE: When disabled the ABS, ESP BAS and (Brake) lights will be illuminated and ABS will not be operational

Reset TCM adaptation

Resets the learned TCM adaptation(instead of pulling a fuse).

Shift Points

Raise shift points by a predefined setting, 5.7L’s (1-2 5800rpm, 2-3 6000rpm, 3-4 6000rpm), 6.1L’s (1-2 6400rpm, 2-3 6400rpm, 3-4 6400rpm).(N/A on Jeep and 11+ cars)

Shift Firmness

Reduces torque management between shifts for a firmer shift , N/A on SRT8 vehicles.

Autostick auto upshift

Enable/Disable automatic upshift when in manual autostick mode, ie. raise your rev limits and you can shift manually at any rpm without the vehicle automatically upshifting (as it would do stock).(N/A on Jeep, offers slightly different behavior on 11+ cars)