A custom V-16 built from two LS3 V-8 engines is being developed to power a one-off roadster designed by Hot Wheels. The project, orchestrated by Fuller Moto, combines the engines into an 854-cubic-inch unit reported to produce around 1,200 horsepower.
The roadster is 19.5 feet long, and its design draws inspiration from the 1938 Cadillac V-16 Series-90. The project also recalls the 1937 Cadillac V16 Hartmann Cabriolet, a small production run made for a wealthy client. Hot Wheels worked on the design with input from the unnamed customer.
Joining the engines required careful work on firing order, cooling, fuel and air, as well as the structure connecting them. Fuller said the rear engine is angled back by about 45 degrees so the two V-8s can fire in the sequence needed for a V-16. One starter turns both engines, while a flexible coupling joins them. Three CNC-machined plates provide their structural connection.
Each engine has its own computer and spark-plug wires. Cooling is shared: a Meziere water pump circulates coolant through both engines and into a single radiator. The intake is a heavily modified Holley unit that will receive further changes as installation progresses. The Tremec T-56 Magnum transmission was prepared by Bowler Performance Transmissions.
The engine is currently displayed on a custom-built stand. The team is waiting for Roadster Shop to complete the roadster’s custom chassis before bringing the powertrain, chassis and body together. The schedule for finishing the vehicle has not been specified.
Sources: Car and Driver.