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Car
Specifications

HQ Racing Vehicle Specifications

The HQ class of racing, is a one make series based on the HQ Holden, 202, 3 speed, 4 door sedan with front disc brakes as produced by GMH between 1971 and 1974. The class has been designed to produce close racing at a minimum cost.
  • Body: HQ Holden
  • Chassis: Standard Chassis Rails and Floor Pan
  • Engine: 202 Red motor maximum .060" oversize.
  • Wade 933 controlled camshaft .
  • Standard crankshaft.
  • Conrods must be standard type.
  • Engine may be blue printed and balanced.
  • Sump may be baffled.
  • Cast pistons only, compression ratio is minimum 45cc.
  • Must be sealed by accredited HQRA Sealer.
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  • Cylinder Head: Valve springs are free, but only one spring per valve (no double valve springs).
  • Valves are free subject to a maximum head size of exhaust 1.375" and inlet 1.675".
  • Exhaust: Exhaust system is free from cylinder head exit.
  • Carburettor: Standard six cylinder 202 red motor Stromberg carburettor (one only).
  • Jets are free. Air cleaner - Speco HQ 900 AC - controlled item.
  • Cooling: Radiator is free but must bolt to original holes. Electric fan may be fitted.
  • Gearbox: Original 3-speed manual gearbox must be sealed by HQRA Accredited Sealer. Floor shift may be fitted.
  • Clutch: Method of actuation is free. One ton clutch assembly may be fitted.
  • Differential: Standard non-limited slip Banjo or Salisbury type Ratio 3.55 to 1, must be sealed by HQRA Accredited Sealer.
  • Wheel Alignment: The camber on each front wheel must not exceed 3° negative. The rear wheel camber must not exceed 0° ± 1° negative.
  • Suspension: Suspension components are strictly controlled by the use of a " Pedders HQ Racing Kit".
  • All mounting points must remain in original position. All bushings must remain original rubber.
  • Steering: Non power steering
  • Brakes: Front disc PBR or Girlock type.
  • Rear drum type.
  • Friction lining type free.
  • Brake hoses maybe replaced with those of aeronautical standard.
  • Wheels:14"x 7" or 14"x 8" mags or steel rims.
  • Tyres: shall be The Kenda Klever H/P KR 15 P235/60R1496H .
  • Pump Fuel: A Commercial Fuel , with a maximum ethanol content of 10%. Pump Fuel shall be available for sale on demand from a roadside retail bowser outlet at each of at least five separate service stations in each of at least three Australian States. A mixture of Pump Fuels with the same hydrocarbon profile is permitted (eg, brands of unleaded petrol (ULP) may be mixed; 10% ethanol-blended fuels and ULP may not be mixed, lead replacement additives as per cams rule book).
  • Minimum Racing Weight: 1365kg (Total weight including driver post race)
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CAMS Manual of Motorsport

Specification of Automobiles
Group 3H – HQ Holden

Note: The CAMS Manual of Motorsport Group 3H Manual should be read in conjunction with the HQ Racing “Technical Regulations”. 

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Thinking About Racing HQs it’s… “affordable excitement!” It may be easy to drive a fast car quickly, but driving a nearly standard HQ Kingswood, complete with 3.3 Litre 6 cylinder and 3 speed manual, now that’s a challenge! 

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