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Page 1: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

2008 Corvette Powertrain

Page 2: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Lineup

6.2L V8 (6162 cc)

430 hp @ 5900 rpm (SAE certified)

436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Hydra-Matic 6L80 six speed automatic

Tremec six-speed manual (w/two optional gear ratios)

Page 3: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Engine Improvements – Piston / Rods

Larger flat top piston design @ 10.7:1 compression ratio

Addition of 4 drilled piston oil drainback holes and higher oil control ring tension to improve the high speed operation at higher performance

Piston profile and pin bore optimization for NVH

Tapered pin ID for mass reduction

Rod bolt joint enhancements include new 12.9 grade rod bolts - similar material as LS7

Page 4: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Engine Improvements – Valvetrain

Valvetrain

Intake valve diameter increased to 55 mm vs. LS2 50.8 mm

Hollow intake valve for mass reduction to maintain high speed operation and the 6600 rpm redline

New inlet rocker arm offset by 6mm between valve tip and rocker bolt/ pushrod to enable an improved airflow path

Gen III/IV conventional rocker arm

High flow head offset inlet rocker arm

Page 5: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Intake Port Flow Results

Small Block Cylinder Intake Port Flow flowboxes, baselines, alum bellmouth for all

Mass Flow Rate (grams/sec)

142.2

166.4

0102030405060708090

100110120130140150160170180

0 2 4 6 8 10 12 14 16

Valve Lift (mm)

Mass Flow Rate (grams/sec) @ 7 kPa

LS2 LS3 17% increase

Page 6: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Exhaust Port Flow Results

Small Block Exhaust Port Flow all w/ 41.3mm ext pipe

Mass Flow Rate (grams/sec)

118.3

125.6

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

0 2 4 6 8 10 12 14 16

Valve Lift (mm)

Mass Flow Rate (grams/sec) @ 7 kPa

LS2 LS3

6.2% increase

Page 7: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

LS2 vs. LS3* Power and Torque

*SAE Certified

Page 8: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Transmission – Hydra-Matic 6L80

Six speed, rear mount, automatic transmission

Driver shift control

Clutch-to-clutch

The LS3 with the 6-speed paddle shift automatic is the fastest automatic Corvette ever with 0-60 mph in 4.3 seconds.

Page 9: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Transmission – Tremec six speed manual

MM6 MZ6First 2.66 2.97Second 1.78 2.07Third 1.30 1.43Fourth 1.00 1.00Fifth .74 .84Sixth .50 .57Reverse 3.42 2.9

Page 10: 2008 Corvette Powertrain. Powertrain Lineup 6.2L V8 (6162 cc) 430 hp @ 5900 rpm (SAE certified) 436 hp @ 5900 rpm w/ optional exhaust (SAE certified)

Powertrain Engine Improvements – Results

Increased power

1/4 mile: 12.4s @ 117 mph vs.12.6s @ 114mph


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