How Nexus shift lights work
The Shift Lights page gives you three independent lights, Shift Light 1, 2 and 3. Each has one setting: an Activation RPM. Once engine speed climbs past that number, that light turns on. Because each light has its own threshold, you can use them as a countdown, or use them for completely different jobs.
Two ways to use them
- A staged warning: light 1 as a "get ready", light 2 as "almost there" and light 3 at the actual shift point. Spaced a few hundred RPM apart, it gives the driver a rhythm to shift on.
- Separate purposes: for example, one light at the ideal upshift point for the street and another higher up for the track.
Choosing the RPM values
Put the final light where the engine should actually be shifted. That's usually where power falls off on a dyno sheet, not the rev limiter. Then work backward for the earlier lights, leaving enough time for the driver's reaction. The faster the engine revs, the wider the gaps need to be, especially in the lower gears.
Check the lights on a real drive before a track day. If you're hitting the limiter before light 3 shows up, bring every light down a little.
More options
For a full LED bar with colors and sequences, set shift lights up on a Haltech display dash. See navigating dashes in NSP. The Elite version is covered in Elite shift lights, and the rest of the related features are listed under vehicle functions.
