Originally Posted by InfiniteVTec
Personally I think boosted applications do best with a lower vtec engagement and N/A with a stock or higher engagement.
The correct engagement is when the low cam torque equals the high cam torque. It doesn't matter if it is boosted or not. In theory, the point where the torque numbers are equal is the correct vtec engagment for best overall power and it should be felt by the driver as a smooth transition.