Carburetor Tuning Reference
Quick reference for common classic carburetors. Always tune a fully warmed-up engine in a well-ventilated space — exhaust contains carbon monoxide.
Common Carburetor Families
| Carburetor | Type | Approx. CFM |
|---|---|---|
| Rochester Monojet | 1-bbl | 150–210 |
| Rochester 2GC | 2-bbl | 300–435 |
| Rochester Quadrajet | 4-bbl (spread-bore) | 750–800 |
| Holley 4150/4160 | 4-bbl (square-bore) | 390–850 |