2001 LS1 vs. 2001 LS6 Comparisons

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Component 2001 LS1 2001 LS6
Type Overhead valve, pushrod V-8
Block Cast aluminum, 107.1 lbs (48.6 kg)
Block Deck Height 9.24 in. (234.7 mm)
Bore x Stroke (in./mm) 3.90 x 3.62 /99.0 x 92.0
Cam Drive Chain
Camshaft Hollow steel
Combustion Chamber Volume 4.1 cu. in. (67.3 cu. cm)
Connecting Rods PF1159M steel, sintered, forged and shotpeened, 6.1-inches
Crankshaft Cast nodular iron with undercut and rolled fillets
Cylinder Head Aluminum, 2 valves/cylinder, 20.3 lbs (9.2 kg)
Displacement 346 cu in, 5665 cc, 5.7 L
Exhaust Manifolds Cast nodular iron
Firing Order 1-8-7-2-6-5-4-3
Fuel Injection sequential electronic fuel injection
Fuel Requirement Premium unleaded
Ignition Individual-coil, DIS (distributorless ignition system) with double-platinum-tipped spark plugs
Intake Manifold Composite, 15.9 lbs. (7.2 kg)
Lifters Hydraulic roller type
Main Bearing Caps Powdered metal
Rocker Arms Investment cast steel with a roller fulcrum but a standard tip
Valve Lift (Intake/Exhaust)(in.) 0.500/0.500 0.525/0.525
Valve Lift Duration(Intake/Exhaust)(degrees) 198/208 204/211
Horsepower (hp @ rpm) 350 @ 5,600 385 @ 6,000
Torque (lb-ft @ rpm) 375 @ 4,400(manual)
360 @ 4,000(auto.)
385 @ 4,800
Redline (rpm) 6,000 6,500
Fuel Cutoff 6,200 6,600
Compression Ratio 10.1:1 10.5:1
Manufacturing Origin St. Catherines, Ontario
Total Dressed Engine Weight Auto. - 457.6 lbs. (208 kg);
Manual - 497.2 lbs (226 kg)
497.2 lbs (226 kg)

2001 LS6 Modifications
   Redesigned engine block includes quarter size slots cast into the webs underneath the travel area of the piston which reduces the amount of air the pistons pump resulting in higher rpm output.
   Redesigned positive crankcase ventilation system improves oil flow during high speed conditions.
   Redesigned air cleaner leading to reduced restriction and greater air intake.
   Redesigned camshaft profile which allows increased valve lift, therefore more air pulled into the combustion chamber which helps to increase power.
   New intake manifold and mass air flow sensor design allows more air intake.
   Higher rate valve springs and a new cylinder head design enhance the engine's breathing characteristics for increased rpm and performance.
   New cast iron exhaust manifolds are used in place of the stamped steel manifolds which improves the flow of exhaust gases. These manifolds connect to a new lightweight, titanium exhaust system which is the first ever to be used in a mass-produced automobile. This new exhaust system incorporates titanium exhaust pipes and mufflers that contain larger louver tubes which help to reduce back pressure and increase performance.

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