Holley Carb Comparison: 4150 Annular Boosters versus 4150 Downleg Boosters versus 4500 Dominator

This is another carburetor comparison, looking at the differences in performance between three different Holley carbs on a 511" FE. This engine eventually peaked at over 700 HP with the Dominator carb, and this carb appeared better than the 4150 carbs tested. Also the 4150 downleg booster carb gave better results than the carb with the annular discharge boosters, probably due to less airflow through the carb with the large annular boosters.

511" FE Annular vs. Downleg Boosters
511" FE Annular vs. Dominator