To maintain a high degree of competition, the Sanctioning Body (IHBA) features classification system that organizes the boats into firmly coordinated groups. There are two main fundamental groups: ET classes based on elapsed some time professional courses considering structural variations. Drivers can choose either group and employ this to their advantage.
Speed is not the identifying factor in the ET classes – the one and only thing that matters could be the time (seconds) needed to finish the quarter mile training course. Motorists can clock reduced times within their specific ET classes, but face disqualification when they go faster. There aren't any structural restrictions in the ET courses, which allow a multitude of ships to contend. Driver skill and technical improvements producing speed are crucial within group of courses.
The professional classes be determined by framework, like the factors: engine framework, fuel kind and hull construction. Engine structure depends on actual dimensions and method of presenting gasoline. Machines may be ordinarily aspirated by a carburetor or gas injection system (Pro petrol) or supercharged (Blown). The supercharged motor uses a blower to force atmosphere in to the engine, resulting in increased compression per cylinder. When you look at the professional classes, machines cannot surpass 500 cubic inches and must burn off a gasoline gas. In Blown courses, engines can not surpass 565 cubic ins and will burn off either methanol (alcoholic beverages), nitromethane (Top gas), or a variety of both (Blown gas Jet).
The 3rd variable in the professional category could be the hull type, including hydroplanes, flat bottoms, or jets. By this definition, a gas burning vessel with a carburetor or fuel injection system and a hydroplane hull is a professional Gas Hydro (PGH). A methanol burning boat with a blower and a set bottom hull is a Blown alcoholic beverages Flat (BAH).
- Top Gas Hydro (TFH)
- Top Alcohol Hydro (TAH)
- Top Gasoline Jet (TFJ)
- Top Liquor Flat (TAF)
- Pro Changed (PM) 7:00 Breakout
- Pro Comp Eliminator (PCE)
- Professional Gasoline Hydro (PGH)
- Professional Eliminator (PE) 8.00-8.99
- Top Eliminator (TE) 9.00-9.99
- Modified Elim (ME) 10.00-10.99
- Stock Eliminator (SE) 11.00-12.00
- River Racer I (RRI) 12.00-12.99
- River Racer II (RRII) 13.00 plus
- PWC We (Ages 10-14)
- PWC II (years 15 & Up)
Drivers generally choose a category at the beginning of each season and stay with regards to choice for the race year. A driver hardly ever changes classifications because of the point system. Things depend on overall performance, compiled over the period of the season. Altering classes would almost definitely deny a driver the chance to simply take things awards in a particular class, the season.