What is variable valve lift? What is variable valve timing? We're going to look at the valvtrain from a 2009 Audi 2.0L I4 Turbo engine to check out the differences. Variable valve lift is used to enhance performance depending on the RPM and load, while variable valve timing is typically used for emissions control (lowering combustion temperatures and thus reducing NOx), but also has performance and efficiency benefits as well. | Engineering Explained

VVT, AVCS, VVL, VTEC, S-VT, MIVEC or whatever your flavour of variable valve timing is, if you're tuning dual variable valve timing then this lesson is for you! This is just ONE module from the detailed Variable Cam Control Tuning course, link below. Starting with the basics, including where and how to get started, Andre runs us through an example on how to optimise dual variable cam timing. He uses a turbocharged FA20 in a Toyota GT86 for the example which is fitted with a MoTeC M150 ECU, howev