NHRA Horsepower Ratings for the 273

The two main problems with the 273 in my opinion are related to the fact that it has a small bore, that makes compression harder to acheive, it takes a dome piston to get anywhere near the 11 to 1 range, and a small bore shrouds the valves and reduces the airflow potental.. Also a dome piston is said to hamper flame travel compared to a flattop, but I dont really know how much that effects power output.