Guide
Pop and bang and launch control explained
Pop and bang (crackle) maps and launch control are performance features. This guide explains what each does, the wear and legal issues to consider, and what we need from you before quoting.
Pop and bang / crackle map
Pricing: Master file price €85 ex VAT · slave (Tier E) €51.
A pop and bang map changes the timing and fuelling on overrun, so unburnt fuel ignites in the exhaust and produces the characteristic crackle.
Overrun fuelling and ignition strategies vary by engine. The map is written for the specific calibration and is designed to protect the engine and exhaust.
The noise is often a legal issue. Exhaust noise limits apply on public roads in many countries, and a crackle map suits track and competition use. Check the rules where you drive.
Heat and fuel use on overrun also rise. Discuss the map with us before ordering if you use the car daily.
Launch control
Pricing: Master file price €49 ex VAT · slave (Tier E) €29.
Launch control holds engine speed at a set point while the car is stationary, then releases it for a quick start. It is used for drag, track and competition work.
The feature puts high load through the clutch, driveshafts and differential. It should only be used with a suitable drivetrain and with the clutch and gearbox in good health.
Tell us the gearbox and the clutch when you upload. If the car has a Stage 2 file, the launch calibration is written with it.
Results vary by engine, fuel, condition and supporting hardware, and no gain or outcome is guaranteed.
Questions about pop and bang and launch control explained
Does pop and bang damage the exhaust?
Repeated overrun combustion adds heat to the exhaust. Use the map for occasional driving and check the exhaust for damage regularly.
Can I use launch control on the road?
Launch control is intended for controlled, off-road or competition use. Do not use it on public roads, where it places heavy stress on the drivetrain and may break local rules.
See emissions-related files All questions
Emissions-related files are supplied for off-road, competition, agricultural and export use only, and must not be used on public roads.