GRADE RULES

PRODUCTION

C GRADE

SUPER PRODUCTION

B GRADE

SUPERS

STOCKCARS

JALOPY

GENERAL

Home Page

NORTHLAND SPEEDWAY CHAMPS - BOARD OF CONTROL

RULES - PRODUCTION

Competitors are asked to respect the spirit of these rules.

IF IT IS NOT MENTIONED THEN IT IS NOT PERMITTED.

***********************************

 

ELIGIBILITY

To be eligible for competition-, the vehicle must be based on a stock standard production

or sports model sedan, coupe or hatchback. Station wagons are permitted. Front or rear wheel drive vehicles only. Right hand drive models only. The manufacturer must have produced a minimum of 200 cars.  The responsibility lies with the competitor for proof.

IF IT IS NOT MENTIONED THEN IT IS NOT PERMITTED

BOARD OF CONTROL HAS THE RIGHT TO RE-GRADE A CAR.

BODY

Only saloon, station wagon, coupe, or hatchback models are allowed. Soft tops, convertibles, sports cars designed with a removable roof, utilities, trucks, four wheel drives and four wheel steer vehicle are not permitted- The body must be in a reasonable condition and safe to race in the opinion of the scrutineer.

Steel body panels only. The body must retain its original appearance.

Wheel arch may be cut away to allow easy access for tyre change.

Doors may be substituted with a panel steel skin conforming to the original shape with a

minimum thickness of 22 or 16 gauge. Original doors must be securely fastened, i.e.

Welded, bolted.

Boot and bonnet must be securely fastened with quick release fasteners, i.e. Straps,

pins, etc. Seam welding of body optional

All upholstery and glass must be removed with the exception of one internally mounted

rear vision mirror and gauges.

All chrome fittings to be removed with the exception of chromed bumpers.

Protective mesh screen to be fitted to cover opening immediately in front of driver.

Hole size to be maximum of 100mm square. If a passenger seat is fitted then the mesh must cover the entire opening in front of both seats

Window nets to be fitted, and/or passenger side arm restrains if running a passenger seat.

Original body fixtures such as bonnet scoops, power bulges and spoiler permitted –

 No custom body moulds allowed.

FIREWALLS

Firewalls must be standard, i.e. No cutting to fit motor.

Firewall must be free of holes front and rear.

All wiring and hoses passing through firewall to be protected against chafing and wear.

CHASSIS

No additions to the original construction of the chassis permitted, with the exception of a
roll cage and the mounting of back bumpers.
Seam welding of body to chassis allowed.
No space frames.

 

 

 

MOTORS

Only standard motors as factory fitted to that make and mode, up to 4.1 litre permitted. Motors and gearboxes

must be in the original position, but may be solid mounted. Fuel injection, turbo

charging is permitted but must be factory fitted. No supercharging is permitted- No

after market bolt ons. Motor may be balanced, but no modifications are permitted unless

specifically mentioned elsewhere in these rules. Specifically there shall be no lightening

of flywheels or any parts, porting and polishing of heads, conrods etc, stroking of cranks,

or piston alteration. 290 fuel injected. Turbo and one turbo up to 2 litres. Only one turbo.

Only standard factory pans as fitted to that motor shall be used including inlet manifold

and carburettor No more  than two carburettors or a total of four barrels may be used.

No modifications to carbs, aftermarket carbs or manifolds permitted. Camshafts may be

modified, and aftermarket cams may be fitted.

Where a fuel injected motor is converted to run a carburettor, only an OEM manifold and

matching carburettor may be used. This need not be off the same model of motor, but

must be made by the same manufacturer, and must fit without modification. The

approval of the Scrutineer must be obtained for any such alteration.

A free flow exhaust manifold or extractors may be fitted.

The exhaust must extend under the car past the rear of the drivers seat. It must be

securely fastened and fitted with a muffler. The noise level must be acceptable to the

scrutineer.

FUEL SYSTEM

Pump gas or Av gas allowed. No blended fuels, e.g. methane}, or additives-
One fuel tank only to be fitted. Must be constructed of 18 swg steel, with a capacity of
approximately 20 litres (5 gallons) and be mounted in the boot securely behind the rear
firewall. Tank should be seam welded and fitted with a screw on cap.
A breather overflow pipe must wrap around the tank horizontally and extend down
50mm below the level of the floor. Overflow pipe should be at least 600mm away from
the exhaust pipe(s).

Fuel lines should be of steel or copper type with all flexible connections to be of steel
braided hose material. Fuel line should pass through the inside of the car, securely fixed
at regular intervals to the floor/drive shaft tunnel the same as C Grade.
A fuel shutoff tap must be fitted within easy reach of the driver and at least 150mm away
from any electrical components. The tap should be clearly marked at ON and OFF
positions.

All lines passing through bulkheads to be protected against wear and chafing.
Fuel injection vehicles to have fuel pump inside engine bay or have a stainless steel or
copper fuel line through inside of car to and from fuel tap.

 

 

 

ELECTRICAL SYSTEM

The battery must be securely mounted inside a steel box 1.2mm minimum or aluminium

box 2.0mm thickness. Such boxes to be suitably insulated and fitted with a secure but

quick opening, easy access lid. The said box must be an approved battery box.

Battery must have an isolation switch within easy reach of the driver, clearly marked at

ON/OFF positions and not likely to be mistaken as a fuel tap. Switch must be at least

150mm from the fuel tap.

Vehicle must be fitted with a self-starter, which is in working order at all times.

SUSPENSION

Suspension must remain original for the make and model of car.
All suspension-mounting points to remain original except right front lower arm which
may be moved out 19mm maximum-
Right front may be stiffened with a heavy spring.
Springs may be softened or cut. If cut, they must be retained. Gas shocks are allowed.

Shocks may be changed but must bolt into original position. Must be original equipment
manufacturer type shock. No racing shocks, ie. Carrera Pro, Bilstein.

TRANSMISSION

Transmission must be as standard and mounted as original on the standard bell housing.
A drive shaft loop must be fitted no further back than 150mm from the front universal
joint and adequately fixed under the floors as to protect the driver compartment. Must be
full loop.

DIFFERENTIAL

All differentials must be standard fitting.
Locked differentials are permitted.

STEERING

All steering systems to be standard to the make of the car.

BRAKES

All brakes to be standard and in working order at all times, with the exception of the
handbrake.

WHEELS

Wheel diameter may be changed.

Maximum 8” rim. Maximum outside the guard 2" (i.e. 5omm)

Right front maybe fitted with 8mm steel centre of approved design

Magnesium or alloy wheels not permitted.

 TYRES

Standard road tyres only to be used- No rally grip tyres, no town and country's, no mud

and snow or any RV tyres.

Grooving allowed; 245 maximum 10mm wide grooving but must follow original pattern.

Casings must be sound

 SEATS

All seats must be securely fitted and must be securely braced behind seat by roll cage.
Headrest must lie fitted behind driver's head. Headrest must be padded adequately.

SEATBELTS

Must be 75mm (3") wide, five-point harness.
Must be adjustable and quick release.
Must be securely anchored to vehicle.

 BALLAST

Absolutely NO ballast of any type is to be used.

Drivers must retain original driving position in vehicle. Left-hand drive conversion is not

permitted.

 

RACING NUMBERS

Racing number plus emblem (i.e.) K, WR, T or D. must be painted on both sides of car

between front and rear wheel arches, either white figures on black background or black

figures on white background. Minimum size of numbers 380mm high x 50mm wide with

a 20mm border.

Number to be painted on roof to be read from right hand side of car. Size as above.

 

BUMPERS

Front and rear bumpers to be fitted as standard.

May be reinforced with a 40mm diameter pipe mounted behind the original bumpers.

The reinforcing may be fitted to the chassis by two points with brackets no longer than 300mm and may extend to within 50mm of the outside edge of the body.

A radiator protection bar may be mounted to the reinforcing tube with a maximum height

of 150mm above bumper. To be no wider than chassis rail.

Lifting chains to be fitted to front and rear bumpers.

 

Roll cage (as shaded) to be constructed from steel. If constructed of steam pipe it is to be a minimum of 38mm OD x 3.2mm wall thickness. If constructed of black medium steel

tubing or RHS it is to be a minimum of 40mm OD x 3.25mm wall thickness.

Roll cage to follow interior contour of the car as near as possible full width and height.

All additional bracing to be minimum 25mm x 3.35mm or similar RHS.

The roof plate must be minimum of 300mm square and of 3mm thickness and welded

continuously on four sides.

Side plates to be 300mm high x 3mm thick steel plate to be welded continuously on four

sides, extending from the driver's feet to behind the driver's seat and reaching from the

upper driver side to lower side pipe below hips and feet.

Each floor mounting plate must measure a minimum of 24 sq. inches. -6”x 4”

Cars with no chassis rail may mount rear roll bar to bumper mounts.

Roll cage must have diagonal bracing, min 25mm fitted immediately behind the seat from passenger side top to driver’s side bottom. If a passenger seat is fitted a second diagonal from passenger side top to driver’s side bottom must be fitted. The roof plate must have 50mm clearance between it and the driver’s helmet, and a roof plate must be fitted to both sides of the vehicle if a passenger seat is fitted.

 

Home Page

 

Contacts:

President; Ken Crisp

Secretary; Debbie Beadle-Taylor 09-4012651

email beadletaylor@xtra.co.nz

Treasurer: Anita Sloot 021 782634

 

Home Page