Twin-Turbo Allison V12 In A Hydroplane

Jimmy King drove the boat at Seafair in Seattle and H1 Unlimited cleverly stuck a camera on to watch the big snails breathing in the seawater and creating mini-clouds. It’s a great view with the engine sticking out behind the cockpit and while King only finished 6th at Seafair, few will doubt his is the coolest powerplant. The 1,710ci Allison V12 in the boat was of the type used in a number of warbirds, including turbocharged versions in the P-38 Lightning.