I have to create a tune with the timing pulled, then re-flash the PCM in the car. The SCT piece will hold 3 tunes, one of which is the stock tune.
The car has a ‘High Octane’ tune in it right now that advances the timing, it’s a slightly noticeable increase in power, and that’s adding ~10* to it.
I’d say the 100 shot will feel more like a 75 with 10* yanked…
Fill the tank with 100 (R+M)/2 octane unleaded fuel, press the red switch located on the Turbo Toys bezel, and discover instant torque and power gains. The PCM will increase spark advance and adjust fueling to take full advantage of the 100 octane unleaded fuel. The red indicator lamp will illuminate when High Octane Mode is active.
During High Octane Mode operation, the PCM prevents damaging detonation via the OEM knock detection system. High Octane Mode will be bypassed if damaging knock is detected. The red indicator lamp will blink when High Octane Mode is bypassed. Spark advance and fueling are returned to standard levels in bypass mode. The blinking indicator light can be turned off by pressing the red High Octane Mode switch. Entering bypass mode is an indication that higher octane fuel is required.
NOTE: It is recommended that the level of premium fuel be as low as possible when adding high octane fuel. The tank level should be reduced until the low fuel indicator is blinking and filled completely with 100 (R+M)/2 octane unleaded fuel before the High Octane Mode is engaged. The use of leaded fuels will cause damage to the vehicles catalytic converter and oxygen sensors.