Judd (engine)

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Judd engines are produced by Engine Developments Ltd., a company founded in 1971 by John Judd and Sir Jack Brabham to design and produce racing engines for competition.

Judd engines have been supplied to a number of competitive racing teams, including Honda, Yamaha, Mazda, Toyota, Nissan, and the Williams, Lotus, Tyrrell, and Arrows F1 Teams. Engine Developments supplied engines for various teams in F1 races from 1988 to 1997.

Engine Developments continues to design and manufacture Judd engines, and supplies them to participants in several racing series, including acting as the exclusive engine supplier to the Formula 3000 International Championship since 1996 through Zytek.

Contents

1 Engine Range

1.1 KV V8
1.2 KV675 V8
1.3 XV675 V8
1.4 GV4 V10
1.5 GV5 V10
1.6 K2000 I4

2 External links

Engine Range

KV V8

ED designed and manufactures the KV 3.0 litre V8 for the F3000 International Championship since 1995. Over 80 engines have been supplied to Zytek Engineering, who carry out all engine maintenance and support the series.

KV675 V8

In 2001 was introduced this 3.4 litre V8 engine when the ACO allowed eight cylinder engines in the LMP675 category. It is based on the KV platform between the 3 litre version which has powered the F3000 cars since 1995 and the 4.0 litre. The 3.4 litre engine uses many common components with these two engines and incorporates new developments from the GV4 V10.

In its inaugural year it won the 675 class of the ALMS Championship, and in 2004 the LMP2 class at Le Mans and Petit Le Mans with Intersport Racing. Its competitivity against 6 cylinder production based engines is reinforced with the recent regulation changes to restrictor sizes and chassis weight limits for 2004 and after.

In its inaugural year of competition the KV675 engine won the LMP675 class of the ALMS Championship for the Dick Barbour Racing team. Since then it has also won its class at the 2003 Petit Le Mans and at Le Mans in 2004.

Configuration: 3397 cc 90° V8, DOHC 4 valves per cylinder
Dry weight: 120 kg including flywheel but not clutch, exhausts or alternator
Dimensions: length 530 mm, height 588 mm including trumpets, width 642 mm
Maximum Power: around 500 bhp @ 9000 rpm (2003 restrictors)
Maximum Torque: 290 lbf·ft @ 8000 rpm
Maximum Rpm: 10500 rpm
Engine Management System: EFI Euro 6
Cooling System: Twin water pumps (one per bank), water outlets on front of cylinder heads
Oil System: Pressure pump and oil inlet on LHS, scavenge pump and oil outlet on RHS
Rebuild Interval: 3000 km

XV675 V8

This new version of the XK675 for 2004 uses a cylinder head originally designed for CART/IRL. It permits operating at higher revs and improves breathing, increasing performance within the ACO LMP2 sized air restrictors limitations when competitors available for the category restricted by valve area in the case of V6’s, or rpm can't make full use of the air available. Also, a more compact design reduces the weight and lowers the centre of gravity.

Configuration: 3397 cc 90° V8, DOHC 4 valves per cylinder
Weight: 118 kg including flywheel but not clutch, exhausts or alternator
Dimensions: length 530 mm, height 588 mm (including trumpets), width 642 mm
Maximum Power: over 500 bhp with 44 mm restrictor
Maximum Torque: 300 lbf·ft (407 N·m)
Maximum Rpm: 11,000 rpm
Engine Management System: EFI Euro 12
Cooling System: twin water pumps (one per bank), water outlets on front of cylinder heads
Oil System: Pressure pump and oil inlet on LHS, scavenge pump and oil outlet on RHS
Chassis Mounting: can be fully stressed
Rebuild Interval: 3000 km

GV4 V10

Introduced in 1999, this is a 4 litre development of the 3.5 litre F1 based engine which finished 4th at Le Mans in 1992. It is competitive in sports car racing thanks to its reduced size and weight since there are fewer compromises in the basic design of a purpose-designed race engine than in a production-based one.

More than 35 engines being built and delivered to teams, it has been installed in all the front running sports car customer chassis, including Lola, Dome and Riley & Scott. Courage, Ascari and Crawford have purpose-designed their chassis for their works run cars to take advantage of its low centre of gravity and simplicity.

The GV4 has been successful: a win at the Daytona 24 Hours in February with the Doran Lista Racing team, and 5th, 6th, 8th and 13th places at Le Mans with ORECA, Racing for Holland and the factory Courage team in the 2002 season.

Configuration: 3997cc 72° V10
Weight: 135 kg (dry weight, includes flywheel and wiring harness but excludes clutch and exhausts)
Dimensions: Length 622.5 mm, Height 417 mm (excluding trumpets), Width 555 mm
Maximum Power: Over 600 bhp (450 kW) @ 10250 rpm (with 48 mm intake restrictor), over 700 bhp (520 kW) @ 10500 rpm (no intake restrictor)
Maximum Torque: 355 lbf·ft (481 N·m) @ 8500 rpm (with 48 mm intake restrictor), 375 lbf·ft (508 N·)@ 8500 rpm (no intake restrictor)
Maximum Rpm: 11,000 rpm
Engine Management System: EFi Euro 12
Cooling System: Twin water pumps (one per bank), water outlets on front of cylinder heads
Oil System: Pressure pump and oil inlet on LHS, scavenge pump and oil outlet on RHS
Chassis Mounting: Top front mounting by shear plate, all others stud fixing, including 4 rear mounting points, can be fully stressed
Rebuild intervals: 3000 km

GV5 V10

Studies of applications have lead to a lower revving, higher torque engine to better suit requirements. The GV5 is an increased stroke variant of the GV4 to 5 litres resulting in a taller engine with slightly different installation requirements. The maximum power is similar but the maximum torque is increased by 25–30% at lower rpm and maximum revs are reduced from 11000 to 9500 rpm, improving the potential long term reliability.

Introduced in the 2002 season with Robinson Racing and Doran Lista Racing, the engine achieved its first race win at the Mont Tremblant Grand Am race and powered Didier Theys to the Drivers’ Championship with Doran. It finished second aboard the Pescarolo in the 2005 24 Hours of Le Mans and won the 2005 LMES championship with the same team.

Configuration: 4997 cc 72° V10
Weight: 135 kg (dry weight, includes flywheel and wiring harness but excludes clutch and exhausts)
Dimensions: length 622.5 mm, height 417 mm (excluding trumpets), width 555 mm
Maximum Power: over 600 bhp (450 kW) @ 7800 rpm (with 2 X 32.7 mm intake restrictor), over 800 bhp (600 kW) @ 10,000 rpm (no intake restrictor)
Maximum Torque: 445 lbf·ft (603 N·m) @ 8500 rpm (with 2 X 32.7 mm intake restrictor), 465 lbf·ft (630 N·m) @ 8500 rpm (no intake restrictor)
Maximum Rpm: 9500 rpm (with 2 X 32.7 mm intake restrictor)
Engine Management System: EFi Euro 12
Cooling System: twin water pumps (one per bank), water outlets on front of cylinder heads
Oil System: pressure pump and oil inlet on LHS, scavenge pump and oil outlet on RHS
Chassis Mounting: top front mounting by shear plate, all others stud fixing, including 4 rear mounting points, can be fully stressed
Rebuild intervals: 3000 km (same as the GV4 but hoped to be increased in the long term)

K2000 I4

This 2 litre version of the K series outputs over 270 bhp (200 kW). For its first year, it completed the 2004 BTCC season with West Surrey Racing's Anthony Reid in his MG ZS, finished at the 3rd place and won 4 rounds. It is also runs in the British Rallycross Championship with Des Wheatley in a Metro and the European Endurance Racing Championship in the MG Sport & Racing MG ZR of Fiona Leggat and Anthony Reid.

External links

[Engine Developments LTD homepage]

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