Tech Answer

How do I choose a carb for a supercharger?

Carburetion: At full throttle a blown engine can require 50% more air than an unblown engine and as a result needs a larger carburetor(s) in order to produce full power. If your blown engine is primarily driven on the street at moderate engine speeds (under 4000 rpm), you won't need a larger carburetor(s). However, to make maximum power and boost you will usually need a larger carburetor(s).

Typically the carburetors(s) will need to be enriched by 5 to 10% on the primaries and 10 to 20% on the secondaries. The idle mixture screws may need to be enriched by one or two turns. In either case, the carburetors need to be jetted properly to prevent a lean condition. A lean condition can lead to overheating and detonation.

For initial start-up, it is better to have a slightly rich condition to help prevent the engine from overheating. After initial start-up, check the spark plugs for proper reading (color) and adjust the carburetor(s) accordingly. You want to see a medium to dark tan color.

Back to Results

Expert Advice & News

Expert Advice

News

New Parts

Your headquarters for the hottest new products!

As Seen on TV

Featured products from your favorite shows!

Free Catalog

Our famous Summit Racing catalog and specialty catalogs, too!

Close