General Motors
will introduce an automotive crate engine variant of the recently
announced high-output Vortec HP3 8100 V-8 marine engine as part
of the GM Performance Parts crate engine portfolio. The engine
will be available for sale through the GM Performance Parts catalog
beginning in late 2003.
"We expect
that the Vortec HP3 8100 engine will be selected by a niche group
of performance-minded customizers who want high torque and power
without compromising durability," said Rick Dunagan, GM Powertrain
director of OEM sales and marketing. "Information we gain
from marine engine development—where conditions are much
more severe—is applied to automotive engine development.
The design improvements realized from the development of the Vortec
8100 truck and Vortec HP3 marine engines have been used to make
a great crate engine."
With its base
Vortec 8100 V-8 truck engine foundation and the Vortec 8100 HP3
V8 marine engine enhancements, the 8.1-liter crate engine combines
the reliability, durability and quality of a proven production
powerplant with the performance characteristics crate engine customers
demand.
The marine
HP3 engine announced for production earlier this year and the
496 cubic-inch Vortec HP3 8100 crate engine will deliver more
than 525 horsepower and more than 560 lb-ft of torque (final output
for the HP3 marine engine will be announced at a later date).
Based on the
largest light-truck cylinder block in the GM Powertrain lineup,
the Vortec HP3 provides factory designed reliability with street-winning
performance. The Vortec HP3 represents the next step in big-block
power while responding to growing market demand for increased
performance.
Performance
features and upfitting work specific to the Vortec HP3 include
virtually seamless, precision-matched intake manifold and cylinder
head ports for optimum flow characteristics. The fuel delivery
system includes a 75-millimeter throttle body with an HP3-specific
400 kPa fuel rail, providing a pressure increase of more than
30 percent over the standard Vortec 8100 production engine. Computer
ignition and fuel management parameters are calibrated to provide
the best possible performance characteristics across the entire
power band. For a complete engine, three key items will be made
available in kit form: an electronic control module, electronic
throttle control hardware and all necessary accessory drive components.
The Vortec
HP3’s valvetrain system is performance matched throughout,
with a high-lift/high-duration camshaft, premium race-style valve
springs, 1.7:1 ratio roller rocker arms, dedicated rocker arm
studs, and HP3-specific intake and exhaust pushrods. Performance
is further enhanced with a dedicated HP3-tuned harmonic balancer,
and individual ignition coils for each of its eight platinum-tipped
spark plugs. In spite of its ability to deliver thoroughbred performance,
the Vortec HP3, with its 9.1:1 compression ratio, is designed
to run on regular (87 octane) unleaded fuel.
"We’ve
incorporated all the strengths of the Vortec 8100 truck engine
into the Vortec HP3 crate engine, including the emissions and
fuel economy improvements we’ve made over the years,"
said Terry Andrzejewski, GM Powertrain Vortec HP3 development
engineer. "Then we went back and pushed those strengths to
an even greater level. The HP3’s impressive performance
comes from a naturally aspirated design based on a stock truck
engine block."
General Motors
(NYSE:GM), the world’s largest vehicle manufacturer, designs,
builds, and markets cars and trucks worldwide, and has been the
global automotive sales leader since 1931. GM employs about 355,000
people around the world. More information on GM can be found at
http://www.gm.com.
2003 Vortec
HP3 8100 High Performance Crate Engine
Specifications
Type: 8.1L
V8
Displacement: 8127 cc (496 cu.in.)
Compression ratio: 9.1:1
Valve Config.: Pushrod actuated overhead canted valves ( 2 valves
per cylinder )
Valve Lifters: Hydraulic roller
Firing Order: 1-8-7-2-6-5-4-3
Bore & Stroke: 107.95 x 111.00mm (4.25 x 4.37 in.)
Main Bearing Caps: 4-bolt cast iron
Balance Method: Internal engine balance
Intake Manifold: Factory-installed PFI (equal length runner) manifold
Oil Pan Capacity: 8 qt . (7 quart fill level after system charge)
Fuel Type: Gasoline (unleaded)(87 octane)
Fuel System: Port fuel injection
Horsepower: 525HP @ 5400 RPM
Torque: ( lb-ft ) : 560 lb-ft @ 4000 RPM
Engine Rotation: Clockwise (facing front of engine)
Spark Plugs: Platinum (1.5-mm gap )
Emissions Controls: Internal PCV orifice system
Paint Protection: Component painted
Shipping Weight: 734.14 lb (333 kg)
Materials
Block: Cast iron
Cylinder Head: Cast iron
Intake Manifold: Coated cast aluminum
Main Bearing Caps: Cast nodular iron
Crankshaft: Cast nodular iron
Camshaft: Steel
Connecting Rods: Forged steel (1141SAE shot-peened and magnafluxed
with 9mm diameter bolts)
Pistons: Hypereutectic coated cast aluminum
Manufacturing
Assembly Site: Tonawanda, New York
Visit:
www.hummer.com