LS1 & LT1 Basic Tech Specs

[RrCoX22]

LS1 Basic Specifications

- Block Dimensions
Displacement: 5.7L (5665cc, 346ci) 6200 max rpm
Block Material: 319-T5 Aluminum
Firing Order: 1-8-7-2-6-5-4-3
Compression Ratio: 10.1:1
Bore/Stroke: 3.90”/3.62”
Bore Spacing: 4.40”
Deck Height: 9.24”
Main Bearings: 5 (2.56” diameter)
Thrust Bearing: Center bulkhead (Number 3 main)
Bearing Caps: 4 vertical bolts, 2 cross bolted fasteners

- Internals
Crankshaft: Cast nodular iron
Pistons: Cast aluminum
Connecting Rods: Powdered metal steel
Cylinder Head: 356-T6 Aluminum (66.67cc)
Valve Size (Intake/Exhaust): 2.00”/ 1.55”
Rocker Arm Ratio: 1.7:1
Pushrod Length: 7.4”

- Camshaft
Stock Cam Specs:
1998-2000 @ .050: 198/209 .498/.497 - 119
2001-2002 @ .050: 196/208 .464/.479 - 115


LT1 Basic Specifications

- Block Dimensions
Displacement: 5.7L (5733cc, 350ci) 5700 max rpm
Block Material: Cast Iron
Firing Order: 1-8-4-3-6-5-7-2
Compression Ratio: 10.4:1
Bore/Stroke: 4.00”/3.48”
Bore Spacing: 4.40”
Deck Height: 9.025”
Main Bearings: 5
Thrust Bearing: Rear Main
Bearing Caps: 2-Bolt Centers and Ends

- Internals
Crankshaft: Cast Iron
Pistons: Eutectic Aluminum/Silicon Alloy
Connecting Rods: Powdered Metal
Cylinder Head: Cast Aluminum (54cc)
Valve Size (Intake/Exhaust): 1.94”/ 1.50”
Rocker Arm Ratio: 1.5:1
Pushrod Length: 7.2”

- Camshaft
Stock Cam Specs:
1993-1995 @ .050: 202/207 .450/.460 - 116
1996-1997 @ .050: 205/207 .447/.459 - 117