LS1

LS1 Engine Platform

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http://www.geareddrives.com/images/LS1.jpg

The LS1 Platform was created with much research and development starting around 1995. The first LS1 Engine found it's home under the hood of the 1997 Corvette, then eventually was given to the late 4th generation F-Body platform in 1998. There is little about this engine that carries over from it's predecessors and that is the 4.4 inch bore spacing. These engines respond very well to modifications, and there were also a few factory 'freaks' that managed to churn out an IMPRESSIVE 400bhp in stock form.

Specs for the LS1 engine are as follows:

All aluminum light weight engine block and heads.

Roller valve train, roller fulcrum 1.7 ratio rocker arms

Bore- 3.8976in

Stroke- 3.6620in

Displacement- 5.665 liters/ 345.69 cu/in.

Rods- Forged Steel

Rod Length- 6.1 inches

Pistons- Cast Aluminum Hyperetuic/434grams each

Compression Height- 34mm

Rings- Top and second use 1.5mm faces

Combustion chamber- 67.3cc's

Intake port Volume- 200cc's

Exh port Volume- 70cc's

Valve seat angles- 30*, 45*, and 60*

Valve Angle- 15*

Compression- 10.2-1

-Intake-

Composite 'Nylon 66' Nylon and glass fiber reinforcement, or Plastic.

Runner Length- 15 in.

Stock TB opening- 75mm.

-Other-

Firing order- 1-8-7-2-6-5-4-3.

Hp/TQ- 345@5600/350@4400 (SS/Corvette)

Max Engine Speed- 6200 RPM

Cam Specs

1998 - 2000 Fbody 202/210 int/exh @ 0.05" duration 0.496" / 0.496" int/exh lift 116 LSA

2001 - 2002 Fbody 197/207 int/exh @ 0.05" duration 0.467" / 0.479" int/exh lift 116 LSA