INBOARD means a motor unit mounted inside the hull and
driving through a Straight Drive, V-Drive,Stern Drive or Water
Jet, and of a type used in automotive or marine applications.
DISPLACEMENT means the hull has NO steps, recesses or tunnels
more than 1-3/8" (approx. 35mm) deep.
HYDROPLANE means the hull has steps, recesses or tunnels more
than 1-3/8" (approx. 35mm) deep.
OUTBOARD mean an engine with gearbox attached as a unit mounted
on the rear of the boat.
UNRESTRICTED means the hull may be of any type or configuration.
UNLIMITED means unlimited, but must remain of an automotive
LIMITED means the volume of the motor is not more than the
BLOWN means supercharged, turbocharged or any other method
of forced induction.
CARBURETTOR means a device that delivers fuel by Venturi effect.
FUEL INJECTION means a device that delivers fuel under pressure
directly into the induction system.
CIRCUIT means the boats race around a course
DRAG means the boats race in a strait line over a 400 metre
Classes: Circuit Racing
GRAND PRIX HYDROPLANE
The Grand Prix Hydroplane is the one of the fastest and
most spectacular class of powerboat competing in Australia
and New Zealand. The Grand Prix Hydroplane class is of international
standard with competitors in New Zealand, U.S.A and Canada.
Hulls are manufactured from conventional timber to the most
modern composite materials available. Size of these craft
are generally 24 feet in length and are powered by either
supercharged or turbo charged Chevrolet engines producing
some 1600 hp, propelling the craft up to 175 mph in race conditions.
B.A.D (BLOWN ALCOHOL DISPLACEMENTS)
B.A.D Boats design is more of your traditional ski boat style
with craft generally 21 feet in length. However that's were
the similarity ends with a traditional ski boat. The B.A.D
Boats use the same big block, high performance automotive
engines as the Grand Prix Hydroplanes, which produce 1600
hp. The B.A.D. Boats can reach speeds of up to 140 mph in
the straight a ways.
6 LITRE DISPLACEMENT
6 Litre Displacements are displacement craft generally 18
feet in length with either carburetted or injected 6 Litre
engines producing some 670 hp. The class is one of the most
competitive in Australia with large fields of competitors
reaching speeds up to 120 mph.
5.2 LITRE DISPLACEMENT
The 5.2 Litre Displacement Class is the perfect lead in class
to 6 Litre and B.A.D with similar feel race craft at speeds
up to 100 mph providing the drivers and fans exciting close
The Oz Boats Class comprises of both Hydroplanes and Displacements.
Both craft are fitted with Stock 4.2 Litre V8, 253 Holden
Motors. The motors are limited to modification by a set of
rules. The engines in general are required to be of genuine
Holden parts or standard replacement pasts with only the cam
being free from restriction, roller rockers may also be used
and the choice of wet or dry sump is allowed. Engine can produce
up to 330 hp and are spun at approximately 7200 rpm.
The Hydroplane class are smaller versions to the Grand Prix
Hydroplane with craft reaching 120 mph, many teams opting
for fully enclosed or open reinforced cockpits. The Displacement
class is the smallest displacement class approximately 15.6
feet in length and racing at 85 mph.
The Oz Lites are the smallest class of hydroplane competing
with craft 16 feet in length, powered by 1600 cc Toyota engines.
Craft developments propel the craft at 100 mph.
The class is a low cost form of powerboat racing which provides
competitors a reliable, yet fast form of racing at a cost
all can afford. The Class boosts some of the largest fields
of any form of power boating with up to 14 competitors racing
in the Australian Series.
Like the Grand Prix Hydroplane this class is a renowned international
class with a World Series in place. Australia's drivers are
technically skilled with five drivers competing throughout
South Africa and Asia, with Craig Bailey from Sydney the winner
of the France Round of the World Championship a few years
The lightweight craft literally fly across the water at speeds
of up to 125 mph.
Juniors, J1(6hp), J2(10hp), J3(15hp)
A special class of racing is available for Junior Drivers
from the age of twelve to sixteen years. Junior racing is
based on a Mono, Wing type hull or hydroplane powered by a
standard low HP outboard motor.
The Juniors race around a shortened course learning about
race craft and forming driving skills in readiness for competition
at a higher level, they are required to have the same safety
equipment as senior racers.
Classes: Drag Racing
INBOARD HYDROPLANE CLASSES (Petrol or Alcohol) CLASS DESIGNATION
Top Fuel Hydroplane TFH, Fuel - Only alcohol or alcohol/nitro
methane mix up to 50% nitro methane.
Blown Alcohol Hydroplane BAH
Blown Hydro Under BHU
Blown Single Drive (Max 500 ci & 8/71 Supercharger, NO
two speeds) BHL
Limited 6001cc to 9260cc LHO
Limited under 6000cc LHU
INBOARD DISPLACEMENT CLASSES (Petrol or Alcohol) CLASS
Blown Alcohol Displacement BAD
Blown Alcohol Flat-bottom BAF
Limited 6001cc to 9260cc LAD
Limited 4601cc to 6000cc SLD
Limited under 4600cc FLD
OUTBOARD CLASSES (Petrol or Alcohol) CLASS DESIGNATION
Unlimited Unrestricted Outboard UOB
Unlimited Outboard Mono Hull UOM
SPEED BRACKET CLASSES CLASS DESIGNATION
Up to 65 mph Social Stock
65mph to 75mph Stock Eliminator
76 85 mph Mod Stock
86-95 mph Super Stock
96-105 mph Super Comp