jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
I hope your coolant fan never comes on, or anything else that would cause the voltage to suddenly drop like auto headlights, otherwise you will have a dead ECU on your hands.
If you dyno in the cold you will see 0 hp gain. If you dyno in heat you will see what the car would make without heat soak. IC restores power loss due to heat soak, but doesn't actually generate more.
I only change my tune when the engine is cold so no danger of the coolant fan coming on.