Earliest VTEC can come on

[T-onedc2]

This question has probably been asked a thousand times... but what is the lowest rpm that vtec can be engaged on a NA VTiR honda Integra ? and what is the best computer to use for it ?.

If the engine is stock there's not need to alter it, has been optimised from the factory. If modified for more power with bigger cams then it could be beneficial but wouldn't be set any earlier in the rev range.