Drivers & Boats
V8 Group A 400 is the class of jetsprinting where engines are mildly restricted to ensure a reasonably equitable playing field for all competitors. V8 Group A 400 is restricted in engine size to 412 cubic inches utilizing cast iron blocks and cylinder heads with a maximum of eight cylinders.
The cylinder heads are restricted to two valves per cylinder. A wet sump lubrication system must be used. Induction is by a single 4-barrel carburetor of restricted size, and fuel must be commercially available petrol or Avgas. A V8 Group A specification engine is capable of producing in excess of 630 horsepower.
V8 Superboats are the top class of racing in jetsprinting with the boats being unrestricted except for a minimum engine size and controlled methanol fuel. V8 Superboat Engines are unrestricted and vary depending on the design concept behind them.
With the key to successful racing being maximum manoeuvrability and speed some believe in the use of heavy-weight big-block engines with capacities up to 676 cubic inches which can produce in excess of 1400 horsepower. The alternative is a new generation of all-alloy lightweight V8 small-block engines with a capacity of 500 cubic inches, weighing only 150 kgs and producing in excess of 900 horsepower. V8 Superboat engines use methanol fuel and have an incredible fuel-burn rate of 20 litres per average run lasting around 50 seconds.