The specific method for upgrading the 3412 to create the new 3412HO was threefold: modify the size of its physical envelope, whittle its weight, and increase its power output. Combined, the modifications resulted in a formidable power-to-weight ratio. Power-to-weight ratio for the 5,400-pound standard, turbocharged, aftercooled bundle was 6.3 lb./hp. The new HO weighs 4,950 pounds, develops 1,000 horsepower at the same 2100 rpm, and boasts a power-to-weight ratio of 4.95 lb./hp. Furthermore, the physical profile of the engine was tailored to meet the space-saving requirements of pleasureboats.