Boost
Revv.ly Glossary
Positive pressure created by a turbocharger or supercharger, measured in PSI or bar.
engine
What is Boost?
Boost refers to the positive air pressure created by forced induction systems (turbochargers or superchargers) above normal atmospheric pressure.
Measuring Boost
- PSI (pounds per square inch) - common in US
- Bar (metric) - common internationally
- kPa (kilopascals) - Japanese specification
Boost Levels
- Stock turbo cars: 7-15 PSI typical
- Modified: 20-30+ PSI common
- Extreme builds: 40+ PSI possible
