![](https://cdn.prod.website-files.com/5e5ae7175a542c69f8e338b4/637cabb4106afa5376ec2f18_reder210011.jpeg)
On an RC car engine, the carb restrictor (or venturi) limits (restricts) the amount of air entering the carburetor.
Smaller hole / less air
- Less power
- Easier to control
- Better fuel economy
Larger hole / more air
- More power
- Harder to control
- Uses more fuel