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The VTEC window is a variable VTEC switch point based on engine speed and engine load. The VTEC window allows the VTEC point to move higher with lighter engine load.
VTEC rpm window
The VTEC rpm window specifies the minimum and maximum rpm for VTEC activation.
VTEC window pressure
The VTEC pressure window specifies the minimum MAP for VTEC activation vs rpm.
See tuning VTEC
VTEC minimum coolant temperature is the minimum water temperature before VTEC will activate.
VTEC engage and disengage minimum speed is the minimum vehicle speed before VTEC will activate. The disengage speed should always be lower than the engage speed.