AS FACTORY INSTALLED IN THE ZO6
pushrod V8, OHV, cast aluminum heads, cast aluminum block,
|Bore and stroke
||3.90x3.62 in., 99.00x92.00mm
||346 cu. in. (5.67
||Sequential fuel injection
|Gross Horsepower (SAE
||405 @ 6000 rpm
|Gross Torque (SAE
||400 lb.-ft. @ 4800
|Valves per cylinder
||St. Catharines, ON
As the intake air comes through the manifolds
in greater volume, it is important for the air to enter the
combustion chamber as quickly as possible to produce power.
The LS-6 engine has a camshaft that has higher lift lobes
than the LS-1, resulting in a 5 percent increase in airflow
through the cylinder chamber.
At the heart and soul of the LS-6: unique
cylinder heads for better engine breathing. Larger ports than
those in the LS-1 engine also improve airflow by 10 percent.
Compression ratio is a healthy 10.5:1.
|LS-6-Mass Airflow Sensor
The mass airflow sensor has been designed
for enhanced airflow, contributing to the horsepower increase
over the LS-1 engine. Greater air intake means greater power
Crankcase Ventilation System
Because of the LS-6’s increased performance
capabilities, changes were made to the positive crankcase
ventilation (PCV) design to improve oil control during high-speed
conditions (compared with the LS-1 PCV system).
The all-aluminum LS-6 engine block has been
refined to enable higher piston speed and higher overall rpm
than the Corvette LS-1 block on which it is based. Hollow-stem
intake valves and liquid alloy exhaust valves are lightweight
and designed to maintain solid contact with the rocker arms
during high-speed operation.
Engine Beauty Covers
Vehicle owners are always being asked, “What’s
under the hood?” With its red beauty covers, the LS-6 is as
impressive with its hood up as it is on the open road. (Sold
Fuel economy is impressive: In the Z06 it
gets an estimated MPG 19 city, 28 highway* with the standard
six-speed manual transmission on the Z06. This will vary depending
on the vehicle it is installed in and your driving conditions.
*Note: Based on GM testing. Official EPA numbers not yet available.