Don't get me wrong I've only had my tc for a few days and don't know much about the engine...yet, but I was a big honda tuner that had a vtec controller on my del sol (b18c). What I'm trying to get at is, I don't think the tc has a lift component in the cam (larger profile cam lobes). Unlike the Celica GTS and Corolla XRS, which have VVTL-I, the tc is only VVT-I. All the controller ever did was change the rpm at which the lift kicked in. Mabey you meant something diffrent when you asked your question.