Exhaust Pop Component

ExhaustPopComponent inspector

Exhaust backfire pops/bangs during deceleration, gear shifts, or rev limiter events. Common on performance vehicles.

Trigger Sources

Pop Source determines what triggers the exhaust pop:

  • ExhaustFlash: Pops triggered by exhaust flash visual effects (requires ExhaustFlash effect configured)
  • RevLimiter: Pops triggered when engine hits rev limiter

Both sources use the popChance probability (0-1) to determine if a pop occurs.

Features

Pop on Deceleration: Random pops when throttle released and RPM > 40%

  • Uses decelerationPopChanceCoeff multiplier
  • Lower volume/pitch than rev limiter pops
  • Only fires while the engine is running (not while cranking, stalled, or coasting with ignition off)

Pop on Shift: Pops during gear changes under load

  • Only triggers when RPM > 50% and throttle > 50%
  • Loud, aggressive pops (1.3x volume)

Configuration

  • popSource: ExhaustFlash or RevLimiter trigger
  • popChance: Probability per trigger event (0.1 = 10%)
  • minPopInterval: Minimum seconds between pops across all triggers (default 0.25). Floors the rate so the rev limiter doesn't spray a continuous burble when throttle is held against it.
  • popOnDeceleration: Enable random deceleration pops
  • decelerationPopChanceCoeff: Frequency multiplier for deceleration pops
  • popOnShift: Enable pops during gear changes
  • clips: Assign 3-5 pop/bang audio clips
  • baseVolume: Overall volume (default 0.3)

Setup

  1. Enable in SoundManager
  2. Assign 3-5 pop/bang clips for variation
  3. Choose popSource (ExhaustFlash or RevLimiter)
  4. Set popChance (0.5-1.0 for aggressive, 0.1-0.3 for occasional)
  5. Enable popOnDeceleration and/or popOnShift as needed
  6. Adjust decelerationPopChanceCoeff if deceleration pops too frequent

Suitable for sports cars, race cars, turbocharged vehicles.