---
title: VSS and Gear Detection
description: 
published: true
date: 2020-05-12T02:08:21.818Z
tags: tuning, vss, gear detection, speed
---

# VSS and Gear Detection
Speeduino contains a 2 step nitrous control system for controlling valves and making fueling adjustments for dry setups. 
The 2 stages operate independantly and can overlap (ie both run at the same time) if needed. 

![VSS Configuration dialog](/img/accessories/vss_settings.png){.align-center width=450}

## VSS Calibration
- **Pulses Per KM/Mile:**
- **Smoothing Factor:** 

## Gear Detection