Engine Choice

The Classic runs one of two engines:

  • Ford

This engine was fitted to cars that competed in the Caterham Scholarship between 1995 and 1997. It has a Ford OHV 2265E ‘Kent’ Crossflow engine, with a bore of 80.98mm and a stroke of 77.62mm, giving a total capacity of 1599cc.

  • Vauxhall

This engine was fitted to cars that competed in the Caterham Scholarship/Academy between 1998 and 2000. It has a Ford OHV 2265E ‘Kent’ Crossflow engine, with a bore of 80.98mm and a stroke of 77.62mm, giving a total capacity of 1599cc.

Both engines utilise Two Weber twin choke 40 DCOE 151 sidedraft carburettors.

Basics

Unlike other classes, the Classic must have a standard windscreen fitted. It should also be fitted with all lighting which is required for road use, including headlights. And a number plate at the front is mandatory, although a registration number is not required. Basically, the car needs to be capable of passing an MOT. The minimum weight, with driver on board, is 610kg.

Suspension

The regulations allow minor upgrades to the suspension, including, in Rule 5.8.1(i)c:

It is permitted to fit adjustable spring platform kit (Caterham part no. DSSU01).

Addition circlip grooves may be machined into the damper body to allow for ride

height adjustment.

Rule 5.8.1 goes on to describe other permissible modifications, including allowing an alternative rear axle A-frame bush material, together with the warning to bear in mind that this is a sacrificial component.

The halfshafts must be of a new strengthened design that CGRC commissioned due to the weakness of the original. These were produced by Rakeway.

Brakes

Rule 5.11 describes the brakes and the various endorsed modifications, such as “Brake pads and shoes are free” and “It is permitted to replace solid brake pipe with flexible brake hose”.

Wheels and Tyres

According to Rule 5.12.6, the wheels have to be either 5.5″ X 13″ Caterham standard Weller steel wheels or 6″ x 13″ aluminium alloy wheels as supplied by or identical to those supplied by Caterham under, part no 77360.

Alternatively cars may fit 6″ x 13″ aluminium alloy wheels manufactured by John Brown Wheels,JBW Minilight (NOT Minilight Mag) with 23 mm offset (ET23). Here are the contact details:

Sharnbrook
Bedford
MK44 1RW
01234 783555

email:  sales@RandR-Alloys.co.uk

Visit: RandR-Alloys.co.uk

The control tyre is the Yokohama 185/60 R13 A539.There is a limit of 12 tyres per season, but permission can be gained to replace a single damaged tyre in a meeting (limited to a maximum of two per year) provided that the damaged tyre in less than 25% worn. The tyres are very reasonably priced and can be sourced via George Polley Motorsport, who will also shave them if required. Here are the contact details:

GPM (Services) UK Ltd
Wimblington Road Manea,
nr.March Cambs
PE15 0JR
01354 688111

email:  info@polleymotorsport.co.uk

Visit: polleymotorsport.co.uk


 

For the full regulations follow the link:

Official 2017 Regulations