Category 2 RS 1600
Permitted modifications supported by documented evidence.
Engine.
1.6, 1.8 cast iron or 2lt Alloy Blocks. Dry sump lubrication system. BDA cylinder head. Not BDG. Ten, twelve and fourteen ml spark plugs are allowed as long as the distance between the inlet valve stems is 1.5inch.
Plus 60thou overbore is allowed without altering class.
BDA 2lt Cylinder blocks (1975cc)
Bore 90mm. Stroke 77.62mm
Due to the shortage of the above blocks the Burton engineering or Quaiffe reproduced castings will be allowed. These must however only have two bolt main bearing caps.
The water pump may be driven by the flank of the camshaft drive belt.
Carburation/Injection
Twin, Weber or Delorto´s
Mechanical fuel injection.
Ignition.
Lucas or Luminition. The Lucas constant energy system is available from John Wilcox Engineering (01455230576) The Luminition system uses an Optronic Trigger system and is an alternative to the Lucas system. It is good to 13000RPM! Both systems ignition pack and coil must be mounted on the inner wing.
Electrics.
12 or 24V Starter motor circuit. Alternator on Poli V or normal V profile drive belt.
Gearbox/Clutch
Four speed standard or 5 speed ZF. Dog boxes are not allowed. Alloy casing for 4speed gearboxes are allowed.
Concentric Slave cylinders are not allowed.
Rear Axle.
Standard unit or fully floating Atlas unit. Alternatively the Quaife English axle kit Pt no QAF4Z can be used. Limited slip differential. Full 5 link axle location. Only short links are allowed. (Approximately 16.5 inches long).
Brakes.
Front. Standard or vented brake disc with AP racing or Girling alloy 4 pot brake calipers.
AP Racing CP2361 (Forestry) or CP2270 (Monte Carlo) front brake calipers.
Rear. Drum brakes, either standard or Capri 3lt. (Baby Atlas). Alternatively non vented disc brakes. Single calipers must have a period design mechanical hand brake mechanism built into it. (Not Sierra). Otherwise two single calipers. One for foot brake and one for the hydraulic hand brake.
AP racing have reproduced the CP2383 rear brake caliper. However two CP2577 calipers, one for foot brake and one for handbrake are acceptable. Ian Rix engineering (01379854387) are marketing a modified CP2577 caliper with a built in mechanical handbrake mechanism to satisfy the MOT/road traffic act. This unit is accepted for use but will still require a separate footbrake caliper
Girling alloy brake caliper information is available from John Freeth on 01600713117 or john@performancebraking.com
Master Cylinders.
Single outlet master cylinders may be replaced by a Tandem or Twin cylinder arrangement.
The fitting of a dual master cylinder or any other type of device providing a simultaneous action on all four wheels and divided action on two wheels is permitted, providing the original brake pedal and pivot point are used.
Steering.
Quick steering rack. 2.5 turns as opposed to 3.5 lock to lock.
Suspension.
Front. McPherson Struts. Adjustable platforms are allowed as long as they are the large (Standard) diameter spring. Double width front anti/roll bar mountings. Tarmac spec Compression strut configuration allowed.
Tension Struts are not permitted.
Top Suspension mountings must be rubber bushed. Spherical bearings are allowed.
Rear. Turret kits (Any height) are allowed. Standard Leaf springs with shackle or slipper type of attachment.
Wheels and Tyres
13 or 15 inch wheel.
Seven inch rim size maximum.
70 profiles tyres minimum.
Switch Gear
Only period indicator stalks are allowed. You may as was done in period rewire a indicator switch to run the wipers on the other side of the steering column .
Body Shell
The Centre tunnel can be enlarged at the front bulkhead area to assist gearbox removal.
The recessing of the floor pan to accomodate the exhaust system is not permitted.
The rear wheel arched may be enlarged to accomodate the fitment of 15" wheels.
General.
World cup cross member with engine mountings. Fibre glass bonnet or boot lid. Perspex windows.
Alloy centrally mounted replacement fuel tank.
Battery fitted in the boot. (Suitably secured and insulated.)
Front and rear steel bumpers must be fitted.
Heated front windscreens are permitted.
