Category 3 RS1800
Ford Escort RS1800 Category 3.
Homologation papers no 1605. 650.
Engine
BDG. 90mm + 60 maximum bore size. 77.62mm Stroke.
Inlet Valves 1.530" between centres.
Engine may be mounted direct to chassis rails.
The water pump may be driven by the flank of the camshaft drive belt.
Fuel system
Carburetors or Mechanical fuel injection.
Kugelfischer Pump Type PL044 fuel injection system is permitted.
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.
Front Suspension
Large or Small adjustable platform strut assemblies.
Top Suspension mountings must be rubber bushed. Spherical bearings are allowed.
Rose jointed adjustable lower arms. These must not be able to be adjusted when fitted on the car.
Compression strut tie bars are allowed as is rose jointed anti/roll bars.
Rear Suspension
Slipper springs, Long links, Panhard rod or Watts linkage.
The fitting of Coil over springs is allowed, however as in period a leaf spring must also be fitted.
The Ford works team I am lead to believe used a plastic look alike spring to satisfy the rules.
Front Brakes
Girling or AP racing Forest or Tarmac Alloy 4 pot calipers and discs.
AP Racing CP2361 (Forestry) or CP2270 (Monte Carlo) front brake calipers.
Rear Brakes
Single or dual AP racing rear brake caliper with suitable handbrake modifications. Solid or vented rear brake discs.
AP racing have reproduced the CP2382 rear vented disc brake caliper or CP2383 for solid brake discs. 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.
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.
The remote brake bias adjuster must be positioned so that it cannot be adjusted by either the driver or co-driver when normally seated in the car.
Wheels and Tyres
13\" or 15\" diameter rims.
Seven inch rim size maximum.
70 profiles tyres minimum.
Body Shell
The Centre tunnel may be enlarged at the front bulkhead area to assist gearbox removal.
We have received documented evidence to prove that Ford included an exhaust tunnel for the Grp 4 RS1800. This recessing is to a maximium of 2 inches.
See drawing below.
The rear wheel arched may be enlarged to accomodate the fitment of 15" wheels.
Bodywork
Bodywork and arches must remain as shown on the Homologation papers
Perspex rear and side windows are permitted.
Fibreglass bonnet and bootlids are allowed.
The bonnet must be plain with no louvres or vents fitted to it.
Front and rear steel bumpers must be fitted.
Heated Front windscreens are permitted.
