Launch Control Activation

Hi,

I have yet to test this on my vehicle as I want to get a better idea of how it works before I begin testing.

With Launch Control in M1, is my understanding correct?

1. Driver holds down Launch button (or toggles?)

2. If conditions are met (vehicle speed, etc), driver increases throttle pedal PAST the entry % to enter Launch Control mode.

3. When driver decreases pedal under the exit %, it launches?

Is that a correct understanding? Or is the launch initiated when the launch switch is released (or taken out of activation position)?

Thanks,

Ryan

What Firmware are you using? There are some variances in the operation of the Launch Control depending on the Package.

You do not need to have a dedicated Launch button, it is possible to have Launch activate if the Activate conditions are met. If Throttle Pedal Entry is exceeded and Vehicle Speed is below the minimum set, then Launch will activate and stay active until the vehicle speed exceeds the Maximum value set, ot if Throttle Pedal drop below the Launch Ext Throttle Pedal value.

From the GPR Help.

Launch

For this system to activate Driver Launch Switch must be On. If no switch is present Driver Launch Switch Mapping Default must be set to On.

This system aids initial take-off by means of ignition retard, engine speed limiting, electronic throttle control and boost aim control. It also provides fuel volume trimming to assist exhaust cooling.

Engine speed limiting during launch uses the Engine Speed table and Engine Speed Margin . The primary means of control is ignition retard.

While engine speed is above launch Engine Speed, the Ignition Timing Limit Advance system attempts to control engine speed using closed loop control of ignition timing. If Engine Speed exceeds (launch Engine Speed + Engine Speed Margin), a hard limit (ignition cut or/and potentially fuel cut) is applied. This allows turbocharged engines to develop boost pressure prior to launch.

The activation state of the launch system is reported by State and further information about why launch is inactive is reported by Diagnostic.

The following conditions must all be met for launch to activate:

Mode must be Enabled.Exhaust Temperature must be less than Activate Exhaust Temperature. If Activate Exhaust Temperature is set to 0 this setting is ignored.Coolant Temperature must be less than Activate Coolant Temperature. If Activate Coolant Temperature is set to 0 this setting is ignored.Vehicle Speed must be less than minimum vehicle speed axis site on the Engine Speed table. This condition is ignored if the vehicle speed axis is not enabled.Throttle Pedal must be greater than Entry Throttle Pedal.Launch will exit if any of the following conditions are met:

The engine is stopped.Vehicle speed axis of the Engine Speed table is enabled and Vehicle Speed exceeds the maximum axis site value.Throttle Pedal is less than Exit Throttle Pedal.Exhaust Temperature exceeds Activate Exhaust Temperature. If Activate Exhaust Temperature is set to 0 this setting is ignored.Coolant Temperature exceeds Activate Coolant Temperature. If Activate Coolant Temperature is set to 0 this setting is ignored.

I'm using GPRP, and I'm curious as to how the launch actually activates.

The above description is complete.

The key condition is that the vehicle be stopped, and Launch Control is enabled. You depress the clutch, and step on the throttle pedal past the Entry Throttle Pedal (Usually going to full throttle). The Launch system holds the engine speed found in Engine Speed Table for 0 mph.

When you release the clutch the Launch system controls the engine speed per the Engine Speed table , Throttle Limit table, and Boost Aim table until any of the exit conditions are met. I suggest using the Veh Speed / Estimate axis on each of these tables and tuning that to get the maximum vehicle acceleration.