Variable Valve Lift

What VVEL is

Nissan's VVEL (Variable Valve Event and Lift) system on the 370Z changes how far and how long the intake valves open, not just when. A separate VVEL control module drives the mechanism, and it takes its commands over CAN. The Haltech Nexus supports this module as a standalone application, so it can tell the module what valve lift to hold without the factory ECU.

Setting it up

1. In Connections > CAN > Vehicle CAN System, select the 370Z CAN bus. The function relies on it to talk to the VVEL module.
2. Wire the module following the 370Z VVEL control module wiring diagram in the NSP help. See our VVL wiring page for the NSP wiring node.
3. Fill in the Variable Valve Target Position table, which sets the valve lift position the ECU asks for.

Tuning the target table

Treat the target position table like any other breathing change. Changing valve lift changes how well the engine fills, so fuel and timing need checking every time you alter it. We change one area at a time, confirm the lift is actually reaching the target in the logs, then retune fuel for that region.