FREE TOOL · VE COMPUTATION
Volumetric efficiency calculator
VE is the ratio of actual air entering the engine vs theoretical maximum based on displacement and RPM. 80% is typical for stock NA petrol; 100%+ for turbo at peak boost; 130%+ for race builds.
VE reference
| Engine | Peak VE | State |
|---|---|---|
| Stock NA petrol 4-cyl | 80-88% | OEM |
| Stock NA M-engine (S65 / S85) | 95-105% | OEM race-bred |
| Stock petrol turbo @ peak boost | 120-140% | Forced induction |
| F1 NA V8 @ peak RPM | 120-125% | Race-only intake |
| Top Fuel dragster (NA) | 200%+ | Mass injection |