What size carburetor would you recommend for an sbc 383 making about 400 hp Currently have edelbrock 600 cfm with electric choke think enough?

While your current Edelbrock 600 CFM carburetor is a good starting point, it may not be ideal for a 383 SBC producing around 400 horsepower. Generally, a carburetor with a CFM rating of around 750-800 would be more suitable for this setup.

Here are some factors to consider when selecting a carburetor size for your engine:

1. Engine Displacement: The larger the engine displacement, the more air and fuel it needs. A 383 SBC has a larger displacement compared to a smaller engine, so it requires more airflow to produce optimal power.

2. Horsepower Output: The higher the horsepower output, the more airflow is required. A 400 horsepower 383 SBC needs a carburetor that can provide sufficient airflow to support its increased performance.

3. Cam Profile: The camshaft profile also plays a role in determining the carburetor size. A more aggressive camshaft with higher lift and duration requires more airflow to achieve its full potential.

4. Induction System: The type of induction system, such as a single-plane or dual-plane intake manifold, can influence the airflow requirements of the engine.

Considering these factors, a carburetor with a CFM rating of 750-800 would be a better match for your 383 SBC producing around 400 horsepower. This will ensure that your engine receives the optimal amount of air and fuel needed for maximum performance and efficiency.