Top Fuel Hydro
Top Fuel Hydros mix nitro methane for fuel. Sometimes confused with nitrous oxide, thereʼs no comparison. Nitro Fuel compressed in a specially designed drag racing engine can make 7000 horse power! Top Fuelers can cover the quarter mile in 4.5 seconds at speeds exceeding 250 mph...with half-track ETs of 2.8 seconds and speeds over 200 mph within just 660 feet! Most Top Fuel Hydros weigh close to 4000 pounds and use two propellers to apply 7000 horse power to the water. Top Fuel Hydros are the quickest and fastest of the drag boat family.
Top Alcohol Hydro
The Top Alcohol Hydro runs racing methanol, street named “alcohol” for fuel. They resemble Top Fuel Hydros but are just a few feet shorter and are half the weight. Most Alcohol Hydros weigh about 2500 pounds and make over 3000 horsepower. With two speed transmissions, operated by the driver, just one propeller pushes these light weight boats over 230 mph, with ETs in the low 5 second range.
Top Alcohol Flat
Top Alcohol Flats are in a league of their own. They have the characteristics of a pavement funny car, but on water use the same power plant as the Top Alcohol Hydros. Top Alcohol Flats donʼt have the 3 point hydro to help guide them down the track. They rely on only a steering rudder and a ride plate, operated by the driver. The bottom of the boat is ﬂat. Top Alcohol Flats run quarter mile ETs in the mid to upper sevens, with speeds at 160 to 170 mph.
The 7-second Pro Mod can be any hull design; outboards, jet drives, ﬂat bottoms, or the most common hull in the class, a hydro, short for “hydroplane”. With or without super chargers on the engines, the name of the game is to run seven seconds to the thousandths of a second. Modern technology is everywhere you look in Pro Mods computerized fuel systems, throttle stops and engine timing. With crew chiefs in the pits monitoring air density, temperature, wind and just about everything else you can think of, Pro Mods are an absolute favorite to watch.
Pro Competition Eliminator
Pro Comp Eliminator has many different boat classes grouped into one, with rules regulating hull design and engine speciﬁcations. Each class runs off an index that is generated by the ET record of the class. Each class does qualifying, then is paired up for eliminations by running as close to or under their index. The starting clock “handicaps” the start of each class.
Pro Eliminator is the 8.00 second class. There has to be a line somewhere and the eight second class is it, although a few Pro Comp Eliminators can run a little under 8 seconds. The Pro Eliminator runs the quickest a boat can run in the IHBA without a driverʼs safety Capsule. Large numbers of boats can show up for Pro Eliminator, sometimes creating ﬁve rounds of competition during Sundayʼs Eliminations.
Top Eliminators run a 9.00 second index. Specially designed lightweight drag boats, itʼs not uncommon to see a bear hull weigh under three hundred pounds. These things are like putting a big engine in an eggshell. Like Pro Eliminators, many Top Eliminators also participate, making ﬁve rounds of competition for Sundayʼs Eliminations.
Mod Eliminators have a ﬁxed dial-in of 10.00 seconds. Outboards, V bottoms, Outboard Tunnels, Hydroplanes, Flat Bottoms and Jet boats full this very competitive class. To run a ten second pass takes a huge outboard set for full race. In boards run big Chevys, Fords, Chryslers, multiple carburetors, fuel injection and nitrous oxide is used, making the horse power you need.
Stock Eliminators need to run 11.00 seconds to make to happen. Donʼt let the name “stock” fool you, though. Most in-board Stock Eliminators make around ﬁve to six hundred horsepower. Thatʼs ﬁve times faster than most performance cars today!
River Racers dial-in their own times, and are allowed to change their dial-in times each round. The slower of the two boats leaves the start line ﬁrst; the quicker boat leaves second. The object is to run close to your dial-in without going under your dial-in. Running under your dial-in would be called a break-out. If both boats break-out, itʼs called a double break-out, and the boat breaking out the least amount wins.
Personal Water Craft 1: Ages 10-14
Personal Water Craft 2: Ages 15+