LS1  Engine Specs

 

 

LS1 Information  350 Horsepower

Block Part Number:

 

12561166

 

Block Type:

Cast aluminum with 6-bolt, cross-bolted main caps

 

Bore x stroke (in)

3.90 x 3.62 (99 x 92 mm)

 

Camshaft duration (@.050 in)

200 degree intake / 203 degree exhaust

 

Camshaft lift (in):

.500 intake / .500 exhaust

 

Camshaft Part Number:

12561721

 

Camshaft type:

Hydraulic roller

     

 

     

 

   

Compression ratio:

 

10.25:1

   

Connecting Rod Part Number:

 

12568734

   

Connecting rods Type:

 

Powdered metal steel

   

Crankshaft Part Number:

 

89017522

   

Crankshaft Type:

 

Nodular iron

   

Cylinder head Part Number:

 

12559855

   

Cylinder head Type:

 

Aluminum, symmetrical port

   

Displacement (cu in):

 

346 (5.7L)

   

Engine Name:

 

LS1 5.7L:

   

Engine type:

 

LS Series small-block V-8

   

Maximum rpm:

 

6000

   

Piston Part Number:

 

88984245

   

Pistons Type:

 

Hypereutectic aluminum

   

Recommended fuel:

 

92 octane

   

Reluctor wheel:

 

24X

   

Rocker arm ratio:

 

1.7:1

   

Rocker arms Part Number:

 

10214664

   

Rocker arms Type:

 

Investment cast, roller trunnion

   

Valve size (in):

 

2.00 intake / 1.55 exhaust

 

 

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