SERIES
TECHNICAL REGULATIONS
Applicable to the 2008 - 2009 Series
PREAMBLE
The philosophy of the OSCA
Super Saloon Series is to provide a racing class where the competitors
are free to design and build the widest possible variety of cars. The
Technical Regulations have been formulated to promote the “Kiwi
Ingenuity” that has been the mainstay of New Zealand motorsport for
decades and to provide a class where American and Australian V8s can
compete head to head with high tech Japanese and European cars.
1. GENERAL
CONDITIONS:
1.1
The regulations contained hereinafter define the specific
restrictions placed on the development of a car for this series. Any
parts or modifications not specified or restricted in this schedule are
deemed to be free as long as Schedule A compliance is maintained.
1.2
The OSCA Committee shall maintain the right to issue
dispensations for non-compliant items that, in the opinion of the
Committee, are in keeping with the spirit of the OSCA Technical
Regulations. Where dispensations are granted, weight penalties and/or
RPM limits may be imposed.
2. SPECIFIC
DEFINITIONS:
Definition of terms used
within this Schedule shall be referenced from the National Sporting
Code, Appendix Two Schedule A and as detailed below:
Engine Capacity:
Unless otherwise stated
the engine capacities stated in this schedule refer to the unadjusted
capacity (swept volume) before applying any equivalency factors.
Monocoque:
means
a metal structure, such as
a production car, in which the skin absorbs all or most of the stresses
to which the body is subjected.
Spaceframe:
means a tubular structure
with a lightweight body where all the stresses are absorbed by the
tubular chassis and none by the body.
Semi-monocoque:
refers to the fabrication of a monocoque
like structure within a spaceframe chassis.
Telemetry:
means any device capable of recording or
transmitting data relating to the performance of any components or
combinations of components on the car.
Traction Control:
means any device (not part of a differential) capable of automatically
limiting the torque transmitted to a wheel in situations where traction
is lost.
3. BODY:
3.1 Eligibility
The body (or the basis of the replica)
must be from a 2 or 4 door factory saloon car or sports
Car where at least 5000 identical units
have been produced. (This is designed to cover a wide range of 4 door
cars plus volume sports cars the likes of Corvette, Camaro Toyota
Celica, Supra, MR2, Mazda RX 7, RX8, MX5, MX6, Porsche 911,924,944, 928,
Nissan 200SX, 300Z,350Z, Mitsubishi GTO, FTO, Ford Probe etc)
3.2 Construction
All or part of the bodywork may be a
replica constructed from lightweight materials.
3.3 Profile
The side profile must remain standard to
the production model with the exception of front spoilers, wheel arches,
rear spoilers and wings.
A bulge incorporating an air opening may
be fitted to the engine cover provided it, or any part of the intake
system, is no higher than 100mm above the standard panel to the area
that is directly above the engine intake system. No part of the intake
system is to protrude above 100mm.
3.4 Wheel Arch Flares
Wheel arch flares not exceeding 125mm
per side overall may be fitted with the measurement being taken from the
outermost part of the original mudguard.
Wheel arch flares may be flared into the
doors.
3.5 Side Skirt Panels
Side skirt panels may be fitted.
3.6 Floor
The floor in the driver/passenger
compartment must remain flat and horizontal relative to the car and
sills. It may not be curved, angled or recessed and must be made of
steel and/or aluminium.
The floor on the passenger side may be
raised to accommodate the exhaust system.
3.7 Seating
Only the driver’s seat is required with
the full seat being offset from the centre line. A passenger seat is
optional. Rear seats are not allowed.
3.8 Mirrors
All cars must be fitted with rear vision
mirrors.
Mirrors must be mounted inside the car
and on both sides of it so that the driver has visibility to the rear of
both sides of the car.
Mirrors must have a reflective surface
at least 100mm by 50mm with a maximum corner radius of 10mm.
3.9 Ducting
Ducting for the purpose of the flow of
cooling air for brakes and radiators is free provided that such ducting
does not alter the profile of the vehicle.
3.10
Front Spoiler
No part of front spoiler may be less
than 60mm from the ground.
4. CHASSIS:
4.1 Construction
The chassis shall consist of the
original monocoque bodyshell, a space frame or combination of both.
The use of additional monocoque or semi-monocoque
construction is prohibited.
The use of titanium, kevlar, carbon
fibre or exotic composite materials is prohibited in the construction of
the chassis.
4.2 Engine Position
The engine may be moved forward or
backward from its original position in the approved car provided one of
the following criteria is satisfied:
·
The firewall may be
altered up to 305mm from its original position with the engine remaining
on the same side of the firewall as original. A section of the
original firewall must remain in place as a reference.
Or
·
The engine may be set back
so that the forward most spark plug is up to 5% of the overall wheelbase
behind a line drawn through the front wheel spindles.
4.3 Telemetry
Chassis telemetry is free except for
spaceframe cars fitted with engines of 4501cc capacity or greater where;
no onboard computer or electronic telemetry for chassis or suspension
set up, monitoring, recording etc. is to be used during qualifying or
racing.
4.4 Traction Control
The fitting of traction control is
prohibited.
4.5 Wheelbase
The wheelbase may be altered by up to
4%.
5. ENGINE:
Engine choice is free providing that the
engine is manufactured by a vehicle manufacturer and is in its original
form. Eligible engines are:
·
Any cast iron block, non
turbo, 2 valve per cylinder engine up to 7000cc
·
Any non-turbo multi-value
engine up to 4500cc.
·
Any single or twin turbo,
2 valve per cylinder engine up to 4300cc.
·
Any single or twin turbo
engine up to 3600cc.
·
Any non turbo Rotary
engine up 3300cc.
·
Any single or twin turbo
Rotary engine up to 2000cc.
·
Any alloy or cast iron
block, in a non spaceframe car, non turbo, 2 valves per
Cylinder engine up to 7000cc.
NB: Twin engined cars are
prohibited!
Twin turbos must
be not be staged
Engines must remain at the original end
of the car but may be rotated.
Capacity ratings above related to the
swept volume of the engine without equivalency factors applied.
5.1 Engine Block
Only a standard production block or an
approved heavy duty version is permissible.
Blocks may be bored, sleeved and
generally machined. Crankshaft main bearing caps may be substituted,
additional main bearing caps and/or bolts may be used.
Internal engine components are free.
5.2 Cylinder Head(s)
Cylinder heads are free except for
engines of 4501cc capacity or greater where the cylinder head(s) must be
a standard production head for the manufacturer’s production street
model or an approved heavy duty version of the cylinder head. In this
case modifications are free so long as the origin of the cylinder head
can be clearly established..
5.3 Induction System
Intake manifold is free.
Engines of 4501cc capacity and above in
a space frame chassis shall be fitted with one Holley type carburettor
of up to four bores with a maximum throttle bore size of 44.45mm.
For all other engine types the
carburettors or fuel injection are free.
The admission of additives (including
water) to the engine intake system is prohibited.
6.
TRANSMISSION:
For spaceframe cars fitted with engines
of 4501cc or greater capacity, the gearbox shall have a maximum of four
forward working gears. Others free.
Front wheel drive and four-wheel drive
cars may be modified to rear wheel drive.
7. REAR AXLE/DIFFERENTIAL:
7.1 Differential
The
differential type is free. Quick change differentials are permitted
provided they are not capable of being operated from the cockpit.
7.2 Rear Axle
Free except that cars fitted with an
engine of 4501cc or greater with spaceframe a solid live rear axle is to
be used.(Refer 8.2 also)
7.3 Four Wheel Drive
The original vehicle manufacturer’s
four-wheel drive system only is permissible providing it retains the
original external componentry. Limited slip differentials are
permitted.
8. SUSPENSION:
8.1 Front Suspension
Free
8.2
Rear Suspension
Free except that cars fitted with an
engine of 4501cc or greater with spaceframe must have a live rear axle.
8.3 Shock absorbers
Free
In no case may shock absorbers be
remotely adjustable from the driver’s compartment whilst competing.
9. WHEELS & TYRES:
Tyre construction, quantity and size are
free except that spaceframe cars fitted with an engine of 4501cc or
greater may use the tyre provided that it does not have a bead diameter
greater than 16 inches nor a tyre width greater than 393mm measured with
the wheel and tyre mounted on the car on the ground at the widest point.
Only racing slicks or suitably speed
rated treaded tyres are permitted.
10. BRAKING SYSTEM:
Dual circuit braking systems are
mandatory.
Brake discs are free but must be of
ferrous material.
Only one calliper per wheel is
permissible.
Fluid cooling of callipers is
prohibited. Callipers with fluid cooling capability may be fitted but
fluid cooling must be inoperable.
11. STEERING:
The steering system is free. Front
steering only is permissible.
12. Radiators
Radiators are free, as are
their locations.
13. Catch Tanks
Oil and water catch
tanks, each of a minimum capacity of 2 litres, are mandatory.
14. WEIGHT:
The minimum weight of the vehicle
excluding the driver shall be determined by engine capacity using
the following equivalency factors:
·
Turbo/forced induction 2
valves per cylinder multiply by 1.4
·
Turbo/forced induction 4
(or more) valves per cylinder multiply by 1.7
·
Rotary engine not turbo
multiply by 1.8
·
Rotary engine turbo/forced
induction multiply by 3.0
Minimum weights are as follows:
·
Up to 2000cc
650kg
·
2001 to
2500cc
700kg
·
2501 to
3000cc
750kg
·
3001 to
3500cc
800kg
·
3501 to
4000cc
850kg
·
4001 to
4500cc
900kg
·
4501 to
5000cc
950kg
·
5001 to
5500cc
1000kg
·
5501 and
over
1050kg
Any car may be weighed at any time
during the competition, including official practice.
Note:
All enquiry regarding the interpretation / clarification of these
technical regulations should be directed (in the first instance) to the
appointed Series
Co-ordinator (as detailed in the current Series Articles) or to the
Motorsport NZ Technical Manager.
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