Repco

Repco
Industry Automotive
Founded Melbourne, 1922
Founder Robert Geoffrey Russell
Headquarters Melbourne, Australia
Area served
 Australia, New Zealand
Products Auto Parts
Services Auto Parts distributor
Number of employees
 4,000
Parent Genuine Parts Company
Website http://www.repco.com.au/
"Repco" Mitsubishi Lancer company car.

Repco is an Australian automotive engineering company. Its name is an abbreviation of Replacement Parts Company and it is best known for spare parts and motor accessories.

The company gained fame for developing the engines which powered the Brabham Formula One cars in which Jack Brabham and Denny Hulme won the 1966 and 1967 World Championship of Drivers titles respectively. Brabham-Repco were awarded the International Cup for F1 Manufacturers in the same two years.[1]

Repco currently runs a series of stores across Australia and New Zealand specialising in the sale of parts and aftermarket accessories.

The company was founded by Robert Geoffrey (Geoff) Russell in 1922 and first traded under the name Automotive Grinding Company, from premises in Collingwood, Victoria.

It currently has over 2,000 employees in almost 400 stores.

Repco was briefly a publicly traded company being first listed on the Australian Stock Exchange in 2003, however following acquisition of all shares by CCMP Capital Asia, Repco has been delisted from the Australian Stock Exchange. From 1 July 2013, Repco and the entire Exego group (consisting of Ashdown-Ingram, Mcleod Accessories and Motospecs) were all acquired by GPC Asia Pacific.

As at the end of 2013 Repco Australia has 295 Stores, and Repco New Zealand has 81 Repco Stores and an additional 10 Appco (Automotive Trade Only) Stores.

Repco V8 engine

In 1964 the Australian/New Zealand Tasman Series was created with a 2500cc capacity limit applied to engines. Jack Brabham approached Repco to develop a suitable engine, and together, they decided to base the SOHC design on Oldsmobile Jetfire 215 ci block with 6 cylinder-head-stud per cylinder. Combined with a short stroke flat-plane crankshaft, Repco designed cylinder heads, camshafts and two-stage chain/gear cam drive, a 2.5L engine was built in 1965 with its cylinder head cast by Commonwealth Aircraft.

In 1963 the international motor racing body, the FIA, announced that the maximum engine capacity for the Formula One category would be doubled to three litres to start from the 1966 season. Despite calls for a "return to power" having been made, few teams were prepared as the main engine supplier in the UK, Coventry Climax, decided to get out of race engine building.[2]

Jack Brabham exploited his existing relationship with Australian automotive components manufacturer Repco. He proposed they design and build a 3L version of the 2.5L engine by using a longer stroke flat-plane crankshaft.

The Repco board agreed to his proposal in light of the expected rival 2.75 L Coventry Climax 'FPF' DOHC engine being of 4 cylinder configuration deemed to be near-obsolete, and the plan to build Cosworth DFV (revealed at the end of 1965 by Ford, its sponsor) was not known yet. A small team developed the F1 engine, fitted with 2-valve per-cylinder SOHC heads from the 2.5L version.

The first advantage of this Repco 620 V8 was its compact size and lightness, which allowed it to be bolted into an existing 1.5 litre Formula One chassis. With no more than 310 bhp (231 kW), the Repco was by far the least powerful of the new 3 litre engines, but unlike the others it was frugal, light and compact.[3] Also unlike the others, it was reliable and, due to low weight and power, the strain on chassis, suspension, brakes, and tyres was low.

This engine being based on British/American Rover V8 /Buick 215 block[4] is a common misconception, as the Rover/Buick V8, although quite similar in appearance and size, had 5 cylinder-head-studs per cylinder (14 studs per head with 6 shared studs in-between-cylinders) configuration that cannot accommodate the 6 stud (18 studs per head with 6 shared studs in-between-cylinders) Repco RB620 heads. The difference in block design originated in Oldsmobile's intention to produce the higher power, turbo-charged Jetfire version. GM's later use of parts diagrams drawn for Oldsmobile in Buick parts catalog showing a 6 stud cylinder block further fueled the confusion.

Four world titles for the single-camshaft 16-valve

In 1966, the Repco engine was good enough to score 3 poles for Jack Brabham. In his one-off BT19, it helped him get 4 consecutive wins and both titles in the 9 races long season, a unique accomplishment for a driver and constructor. This was his third title.

The 2,995.58 cc V8 Repco had a bore and stroke of 3.50 x 2.375" (88.9 x 60.3 mm). Initially it gave about 285 bhp (213 kW; 289 PS). A test bed figure of 310 bhp (231 kW; 314 PS) at 7,800 rpm with 230 lb·ft (310 N·m) torque at 6,500 rpm was obtained. In race trim, about 299 bhp (223 kW; 303 PS) was available. In 1967, the bore and stroke remained unaltered. In that year, 325/330 bhp at 8,500 rpm was often quoted. A test-bed figure of 327 bhp (244 kW; 332 PS) at 8,300 rpm was recorded. For 1968, a 32-valve version with 400 bhp (298 kW; 406 PS) at 9,500 rpm was planned. But only about 380 bhp (283 kW; 385 PS) at 9,000 rpm was achieved.

In 1967, the competition had made progress. Repco produced a new version of the engine, the 700 series, this time with a Repco designed block. Brabham scored 2 poles early in the year, but then the new Ford Cosworth DFV V8 appeared in the Lotus 49, setting a new pace with its 410 hp (310 kW) at 9,000 rpm, with Jim Clark and Graham Hill taking all poles in the rest of the season. As the Lotus was still fragile, the Brabham pilots scored 2 wins each. Brabham used new parts on his cars, which was not always helpful, so Denis Hulme collected more results and the title, followed by Brabham himself, who again won the constructors title.

No success for the double-camshaft 32-valve

The new Ford engine, which was made available to other teams in 1968 also, convinced Brabham that more power was needed. With hindsight Brabham commented that the single cam motor's reliability may have been enough to supplant the more powerful Cosworths as late as the 1968 season. A new version of the Repco V8, with gear driven double overhead camshafts and four valves per cylinder, was produced for 1968 to maintain its competitiveness. A figure of 400 bhp (298 kW; 406 PS) at 9,500 rpm was targeted but only about 380 bhp (283 kW; 385 PS) at 9,000 rpm was achieved. The season was a disaster as it proved very unreliable due to unsurmountable valve gear unreliability. There was also a 4.2 litre derivative for the Indy 500. Jochen Rindt, who had moved to Brabham at the wrong time, managed to score two poles and two podiums that year, while Brabham himself collected only two points. The Repco project had always been hindered by the lengthy lines of communication between the UK and Australia, which made correcting problems very difficult. Repco, having spent far more money than originally envisaged and having sold very few customer versions of their engine, stopped the project.

For 1969, the works Brabham team and most of the private Brabham entries also used the ubiquitous Cosworth powerplant. A pair of older Brabham-Repcos were entered in the season opening 1969 South African Grand Prix by local drivers Sam Tingle and Peter de Klerk, but no points were scored on the engine marque's last appearance in the world championship.

Also, LDS fitted with Repcos were used in the South African Grand Prix in the late 1960s, as well as in the national F1 series there.

Other racing

Repco Brabham 760 series 5 litre quad cam V8 engine in the Matich SR4 sports car

Repco had been involved in Australian motor racing many years prior to the association with Brabham. Most famous had been development of the engine of the series of Maybach Specials in the 1950s to various wins including the 1954 New Zealand Grand Prix.

The Brabham-Repco project was initially aimed at the Tasman Series, where Coventry-Climax's obsolete FPF 4-cylinder engine was dominant in the mid-1960s. The 2.5 litre version of the Repco V8 was never very successful in this series, initially producing no more power than the FPF. It did however record one Tasman Series round win with Jack Brabham driving his Repco powered Brabham BT23A to victory in the 1967 South Pacific Trophy at the Longford road circuit in Tasmania.

Brabham-Repco's were also prepared and entered in the 1968 and 1969 Indianapolis 500. In 1969, Peter Revson finished fifth in such a car. He also won a USAC race in the same year.

Further versions of the V8 engine were produced, including a 4.3 litre variant for sports car racing and a turbo-charged version intended for United States Automobile Club races. Neither version met with any international success, the turbo in particular being labelled 'Puff the Tragic Wagon' by its development team due to its lack of horsepower (compare with Puff the magic dragon).

The sports car engine (increased in size to 5.0 litres) was however dominant domestically, powering cars to several wins in the Australian Sports Car Championship and its predecessor the Australian Tourist Trophy, most notably powering the Matich sports cars built and raced by Frank Matich, and Elfin Sports Cars built and raced by Garrie Cooper .

Repco Brabham racing cars

Repco Brabham badge on the nose of a Repco Brabham BT6 racing car

When Jack Brabham began building racing cars in England he named his cars Repco Brabhams,[5] the result of a sponsorship deal between Brabham and Repco.[6] This name was applied regardless of the engine used,[7] and the arrangement existed through to the end of the 1960s.[8] The agreement saw Repco's international marketing of its automotive parts and service equipment supported by Brabham's racing achievements.[7]

Repco-Holden Formula 5000 engine

Repco also developed and built the Repco-Holden Formula 5000 engine for Formula 5000 racing. Repco used the block and head castings of the Holden 308 V8 engine as its basis,[9] but it featured many modifications including Lucas fuel injection and dual coil Bosch ignition and more than 150 special components designed by Repco.[10] The engine first tasted success in the 1970 Australian Grand Prix which was won by Frank Matich driving a Repco-Holden powered McLaren M10B.

The engine was then used extensively in racing vehicles including cars competing in the Tasman Series, the Australian Drivers' Championship, the Australian Sports Car Championship and the Australian Sports Sedan and GT Championships.

By 1976, power for the 5.0 L Repco-Holden V8 was rated at approximately 500 bhp (373 kW; 507 PS).

Due to the success of the Repco-Holden V8, Holden enlisted Repco to carry out the development work (on the dyno only, according to Holden Dealer Team boss Harry Firth) on Holden's 308 engine for their Holden Torana SL/R 5000 which was released in 1974. Firth believed that developing the engine on the dyno and not on the race track saw continual problems for the engine such as oil surge, especially in touring car racing. He also claimed to have already cured the oil problems while developing the still-born Holden LJ Torana GTR XU-1 V8 in 1972 and that Holden ignored his warnings about the Repco engine.

The list of Repco-Holden's Formula 5000 engine race, championship and series wins includes:

Australian Grand Prix

Australian Drivers' Championship

New Zealand Grand Prix

Australian Sports Car Championship

Australian Sports Sedan Championship

Australian Tourist Trophy

Toby Lee Series

International Cup for F1 Manufacturers – results

World Championship of Drivers – results

Year Team Driver # of GPs WC
1966 Brabham-Repco Jack Brabham 9 World Champion
Brabham-Repco Denny Hulme 7 4th
1967 Brabham-Repco Denny Hulme 11 World Champion
Brabham-Repco Jack Brabham 11 2nd
Brabham-Repco Guy Ligier 5
1968 Brabham-Repco Jochen Rindt 12 12th
Brabham-Repco Jack Brabham 11 23rd
Brabham-Repco Silvio Moser 4 23rd
Brabham-Repco Dan Gurney 1
Brabham-Repco Dave Charlton 1
Brabham-Repco John Love 1
Brabham-Repco Kurt Ahrens, Jr. 1
LDS-Repco Sam Tingle 1
1969 Brabham-Repco Peter de Klerk 1
Brabham-Repco Sam Tingle 1

References

  1. ↑ 1974 FIA Yearbook, Grey section, pages 120–121
  2. ↑ Setright, L.J.K. "Lotus: The Golden Mean", in Northey, Tom, ed. World of Automobiles (London: Orbis, 1974), Volume 11, p.1232.
  3. ↑ Fearnley, Paul (May 2006) "The powerhouse that Jack built" Motorsport p.36
  4. ↑ Pinder, Simon (1995) Mr Repco Brabham Frank Hallam pp. 20–23 Pinder Publications
  5. ↑ Pedr Davis, The Macquarie Dictionary of Motoring, 1986, page 401-402
  6. ↑ Alan Henry, Brabham - The Grand Prix Cars, 1985, page 53
  7. 1 2 Graham Howard, Made in Australia - The Repco Brabham V8s, Australian Motor Racing Year 1983/84, page 34
  8. ↑ David Hodges, A-Z of Formula Racing Cars, 1990, page 32
  9. ↑ Repco advertisement, "Guide to the Gold Star, Supplement to Racing Car News, August 1972, page xvi
  10. ↑ 1970 Tasman Series Retrieved from www.sergent.com.au on 13 September 2009

External links

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