MINI MODIFIED
-Mini Modified Tractors are those using engine(s) up to a maximum capacity of 375 cubic inch.
-The engine may employ a roller camshaft and be naturally aspirated with a maximum of one venturi per cylinder (i.e: dual 4 barrel carburettors are allowed), with no blowers or turbo charging. All engines are limited to two valves and one spark plug per cylinder.
-LS series engines must use OEM cylinder heads and thermoplastic inlet manifolds, and must use the factory electronic fuel injection system and fuel injectors.
-Transmissions and differentials must be derived from passenger cars or trucks. No planetary racing transmissions, slider clutches, or quick change differentials are permitted.
-Weight class is 900 kg, including driver and safety apparel.
-No portion of a Mini Modified tractor may exceed 2440mm forward of the centre of the rear wheel, including removable ballast
-No portion of the tractor shall exceed 1930mm in width.
super mini
- Super Mini Modified Tractors are those using engine(s) up to a maximum capacity of 450ci small block
naturally aspirated. The engine(s) may employ a roller cam shaft.
Mechanical fuel injection or electronic fuel injection is allowed.
- Transmissions and Differentials must be derived from passenger cars or trucks. No planetary racing
transmissions, slider clutches, quick change differentials are permitted.
- Weight class is: 920kg, including driver and safety apparel.
- No portion of a Super Mini Modified tractor may exceed 2440mm forward of the centre of the rear wheel,
including removable ballast.
- No portion of the tractor shall exceed 1930mm in width.
open mini
1. (a) Open Mini Modified tractors are those using any small block v8 up to 410ci plus 60 thou utilising
a blower, turbo(s), and / or EFI & mechanical injection. All race / pump fuels allowed.
(No Avgas or Nitrous injection).
(b) Alternative engine combo is a single v8 big block up to 540ci plus 60 thou must be naturally
aspirated. No blowers, turbos, NOS. Multiple carbies, EFI & mechanical injection allowed.
All race / pump fuels allowed (No Avgas or Nitrous injection).
2. Open Mini Tractors using option (A) are permitted the use of Engine Management Systems.
3. Weight class is: 950kg, including driver & safety apparel.
4. No portion of an Open Mini Modified Tractor may exceed 2440mm forward of the centre
of the rear wheel, including removable ballast.
5. No portion of the tractor shall exceed 1930mm in width.
6. Auxilliary Starting Motors are permitted, operating through the neutral start and ignition mechanism
by a competent operator.
outlaws
- Â Outlaw Mini Tractors are unlimited.
v8, combos / size, turbine, radial (aeroplane)
All fuels allowed, race, pump, methanol, nitrous injection allowed (No Avgas).
- Open Mini and Outlaw Open Mini Tractors are permitted the use of Engine Management Systems.
- Weight class is: 950kg, including driver & safety apparel.
- No portion of an Outlaw Mini Tractor may exceed 2440mm forward of the centre
of the rear wheel, including removable ballast.
- No portion of the tractor shall exceed 1930mm in width.
- Auxilliary Starting Motors are permitted, operating through the neutral start and ignition mechanism
by a competent operator.
limited modifed
- Limited Modified Tractors are those using engine(s) up to a maximum capacity of 375 cubic inch.
- The engine may employ a roller camshaft and be naturally Aspirated with a maximum of one venturi per
cylinder (i.e: dual 4 barrel carburettors are allowed), no blowers or turbo charging. All engines are limited
to two valves, one spark plug per cylinder.
- All LS series engines must use OEM cylinder heads and thermoplastic inlet manifolds with either one
of the following casting numbers showing.
•
#12590123
•
#12573572
•
#12590124
•
#88894339
•
#12589181
•
#12602477
Must use factory electronic fuel injection and fuel injection system and fuel injectors.
- Weight class is: 3400kg, including driver & safety apparel.
- No portion of a limited modified tractor may exceed 4267mm forward of the centre of the rear wheel,
including removable ballast.
- Maximum width of vehicle is to be 2440mm at its widest point including ballast.
super modifed
- Super Modified Tractors are those using any combination of engine(s), transmission(s) and final drive,
up to a limit of 540 cubic inch blown (supercharged & turbo charged) engines or 1080 cubic inch naturally
aspirated engines. The engine(s) may be up to 60 thou rebored.
- Mechanical and Electronic Fuel Injection is allowed.
- Weight class is: 4300kg, including driver & safety apparel.
- No portion of a limited modified tractor may exceed 4267mm forward of the centre of the rear wheel,
including removable ballast.
- Maximum width of vehicle is to be 2440mm at its widest point including ballast.
open modifed
- Open Modified tractors are those using any combination of Automotive, Marine, Aircraft or Turbine
engine(s), transmission(s) and final drive. There is no limit to the capacity. Blowers and Turbo-charging
is permitted.
- Weight class is: 4000kg, including driver & safety apparel.
- No portion of a Open Modified tractor may exceed 4267mm forward of the centre of the rear wheel,
including removable ballast.
- Maximum width of vehicle is to be 2440mm at its widest point including ballast.
pro stock
- The engine capacity for Pro-Stock:
Below 7.68 litres (470ci)
- Weight class is: 4600kg, including driver & safety apparel.
- The maximum length of 3962mm from centre of rear wheel to forward most portion of tractor including
removable ballast.
- Maximum width of vehicle is to be 2440mm at its widest point including ballast.
- No four wheel drive model tractors are eligible as a Pro-Stock entry.
- In order for a particular model of Tractor to be eligible as a Pro-Stock entry there must have been
150 units produced of that model, it is up to the owner to provide documented proof should a protest
be made.
pro stock open
- The engine capacity for Pro-Stock Open:
Above 7.68 litres (470ci)
- Weight class is: 4600kg, including driver & safety apparel.
- The maximum length of 3962mm from centre of rear wheel to forward most portion of tractor including
removable ballast.
- Maximum width of vehicle is to be 2440mm at its widest point including ballast.
- No four wheel drive model tractors are eligible as a Pro-Stock entry.
- In order for a particular model of Tractor to be eligible as a Pro-Stock entry there must have been
150 units produced of that model, it is up to the owner to provide documented proof should a protest
be made.
2wd truck
1. (a) All 2WD trucks are allowed one naturally aspirated v8 automotive engine up to 540ci plus 60 thou,
mechanical injection allowed. All race / pump fuels allowed (No Nitro). Alternately can have a forced
induction engine up to 410ci plus 60 thou with a maximum blower size of 8/71 and 30% overdrive.
(NO AVGAS allowed)
(b) 2WD Outlaw Trucks are all those using any combination of Automotive, Marine, Aircraft or Turbine
engines(s) Transmissions and final drives. There is no limit to the capacity, Blowers and turbo charging
are permitted. And all fuels allowed (NO AVGAS).
2. Weight class is: 2700kg, including driver, passenger & safety apparel.
3. The maximum length of the truck is to be 4572mm from centre line of rear axle to forward most portion
of truck, including weight racks, etc.
4. Maximum width is to be 2440mm wide at its widest point.
modified mowers
- Chassis
Original mower chassis MUST be used. Cutting deck and drive pulleys removed. Bonnet to correspondÂ
with make of mower (allowed to change colour). Mower to be a maximum of 6ft long, end to end, and 4ftÂ
wide.
- Engine
• Any single or twin cylinder 4 stroke vertical crank engine from lawn and garden industry origin
• A maximum of 16 H/P for a single cylinder or 500 cc for a twin