What VVEL is
VVEL (Variable Valve Event and Lift) is the system on the Nissan 370Z that changes how far, and for how long, the intake valves open. The factory setup uses a separate VVEL control module, which takes a target from the engine ECU and moves the mechanism to match. The Elite's Variable Valve Lift function replaces the factory ECU in that conversation, so the VVEL module can run as part of a complete Haltech standalone install.
This function is meant for a full aftermarket install. If the factory ECU is left running alongside (a parallel install), it won't receive the messages it expects from the module and will drop into limp mode.
Wiring tab
| Setting | What to choose |
|---|---|
| Input Mode | CAN |
| Output Mode | CAN |
| Bank 1 Input | The CAN channel carrying bank 1 position |
| Bank 2 Input | The CAN channel carrying bank 2 position |
| Target Output | The CAN channel the Elite broadcasts the lift target on |
Both bank inputs matter. The ECU needs position feedback from each side so it knows where the mechanism actually is, not just where it asked it to be.
Tuning table
There's one main table: Variable Valve Lift Target Position, which sets the lift position you want at each operating point. We treat it much like cam timing. Start from a conservative, known-good map, make changes in small steps on the dyno, and log commanded against actual position for both banks to confirm the module is following the target.
Wiring diagram
Haltech publishes an Elite 370Z VVEL control module wiring diagram showing how the module connects. You'll want it before you start building the harness.
Need this diagram? Ask us and we'll send it over with advice for your build.
The same approach of commanding a target and watching feedback is used by cam control. For help planning a VQ37 standalone, book a free 30-minute consultation.
