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Old 08 Aug 2007, 07:07 pm
Join Date: Aug 2007
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Default 2004 Honda S2000 - Introduction

Torrance, Calif. - Oct 01 —



The Honda S2000 is a high-performance, 2-seat,
roadster with an advanced front-engine, rear-wheel-drive sports
configuration. Introduced in 2000 as a commemoration of
Honda's 50th
anniversary, the S2000 incorporates many of the lessons
learned in
the company's five decades of building and racing cars and
motorcycles. Its original concept was to be a true sports car that
could serve as both a practical and fun daily driver and a highly
capable weekend track racer.

For its 2004 redesign, Honda engineers built on those
ideals and
elevated the S2000 to a higher class by strengthening the
performance, enhancing the interior and giving the exterior a
bolder appearance. The net gain is an S2000 that is
simultaneously an
improved track car and an improved daily driver.

The 2004 S2000 benefits from the following major

  • Larger displacement 2.2-liter engine (240 horsepower @
    rpm and 162 lb.-ft. of torque @ 6500 (replaces 240 hp @ 8300
    and 153 ft.-lbs. @ 7500 rpm )

  • Larger wheels and tires (17-inch)

  • Revised suspension tuning

  • Revised transmission gear ratios and improved shift

  • Bolder front and rear exterior styling

  • Freshened interior design

  • New options including XM Satellite Radio™ and headrest

On the track, the 2004 S2000 accelerates with increased
and more pull through corners with a broadened powerband that
on sooner and stronger. The new suspension tuning enhances
control qualities at the limit, while minimizing bump steer effects
from road disturbances. Larger 17-inch wheels and tires provide
grip and maximize the suspension tuning.

From 1000 rpm to 8000 rpm, available torque and
increase between 6- and 10-percent. Additionally, useful power
high performance acceleration begins at about 3000 rpm
compared to
about 6000 rpm on the 2000 - 2003 models. This performance
improvement at the lower rpm ranges can be attributed to the
displacement increase, revised valvetrain tuning and the lower
ratios on gears one through four that help magnify the engine
performance gains.

On the street, the 2004 S2000 transmits less ride
harshness, while
the enhanced powerband reduces the need to shift as often in
circumstances. Interior comfort also improves with more elbow
shoulder room, and the center console now has two cupholders,
storage tray and more utility.

The sum of the entire series of changes produces
results on a platform that sets an industry standard for precision
and performance. In short, the 2004 S2000 sports a new
muscular feel,
refined handling and enhanced interior comfort with better
convenience features while maintaining its focus as a true high
performance sports car.

2004 S2000 Improvements

Performance and Handling

  • Dynamic acceleration potential increased

  • Transmission shifter direct feel increased

  • High-speed stability enhanced

  • At-the-limit performance increased with more gradual

  • Sensitivity to disturbances decreased (less bump

  • Steering feedback enhanced

  • Brake pedal dynamic feel enhanced

Comfort and Convenience

  • Interior space increased

  • Interior storage functionality increased

  • Optional audio features added

2004 Honda S2000 vs. 2003 Honda






2.2-liter DOHC VTEC

2.0-liter DOHC VTEC

+ 0.2 liters, attributable to engine stroke change


240 @ 7800 rpm

240 @ 8300 rpm

+ 0 hp @ -500 rpm, same peak horsepower with overall
powerband characteristics strengthened 4% to 10% between
1000 -8000 rpm

Torque (lbs.-ft.)

162 @ 6500 rpm

153 @ 7500 rpm

+9 lb.-ft. @ -1000 rpm with improved powerband
characteristics strengthened between 4% and 10% between
1000-8000 rpm. Max torque increases 5%.

Rev Limit (fuel cutoff)



Piston travel configuration decreases rpm limit by 9%
because of piston speed increase.

Compression Ratio




Transmission Ratios



Gears 1-4 = 4% lower for performance

Gear 5 = 1% lower

Gear 6 = 2% higher


Wheels (inches)

Front: 17x7

Rear: 17x8.5

Front: 16x6.5

Rear: 16x7.5

Front: + 1x0.5 (new wheel design)

Rear: + 1x1 (new wheel design)


Front: P215/45R17

Rear: P245/40R17

Front: P205/55R16

Rear: P225/50R16

Larger contact patch


New Tuning


Front: Increased spring rate 6.7%

Rear: Decreased spring rate 10%

Shock Absorbers

New Tuning


Tuned for new suspension settings

Stabilizer Bars (mm)

Front: 26.5x t4.5

Rear: 25.4 x t4.5

Front: 26.5x t4.5

Rear: 27.2 x t4.5

Front: Same

Rear: -1.8 x 0

Ride Height

Non-Load: 5.1

Full-Load: 4.2

Non-Load: 5.1

Full-Load: 4.2

No Change





5% improvement in Cd from new front bumper design

Body Rigidity



Rigidity increased

Front Bumper



New bumper and new triple-beam headlight designs

Rear Bumper



New bumper, triple beam LED taillights and oval exhaust
tips designs

Weight (lbs.)



+24, attributable to body rigidity increase and new
wheels and tires

Exterior Dimensions

L x W x H (inches)

162.2 x 68.9 x 50.0

162.2 x 68.9 x 50.0

0 x 0 x 0


Shoulder Room (in.)



+0.9 (20mm)

Interior Console



New console with two cupholders (+1) and storage
compartment, new trim pieces

Interior Doors



Increased elbow and shoulder room, new speaker

Steering Wheel

Minor update


New Honda emblem


New design


XM Satellite Radio available and optional headrest
speakers added

The 2004 S2000 engine has been re-designed and
increased by 0.2 liters through lengthening the stroke of piston
travel. The 2.2-liter, DOHC VTEC 4-cylinder engine produces 240
horsepower and 162 lb.-ft. of torque while meeting California's
Low-Emission Vehicle (LEV) standards. Honda's innovative
advanced variable valve-timing system, operates the S2000
engine's 16
valves (4 per cylinder) in both intake and exhaust modes. This
is compact and tailored to the high-output, high-rpm operating
characteristics of the S2000 engine.

A revised 6-speed, manual transmission provides lower
gear ratios
on gears one through five, and a higher sixth speed gear for
cruising The transmission is a compact design and features a
shift linkage with class-leading feel and short throws. A Torsen
limited-slip differential smoothly delivers power to the rear
regardless of traction conditions. The S2000 engine and
are capable of accelerating the S2000 from 0-60 mph in less
than six

Honda's racing experience is also evident in the S2000's
responsive handling. The chassis has an ideal 50/50 weight
distribution, and the body and frame are a hybrid
structure that forms a rigid, flex-free platform for the S2000's
in-wheel double wishbone suspension system, and plays an
role in helping the S2000 achieve its high level of safety
protection. The power steering system is a highly responsive,
electrically assisted type.

Larger front 215/45 87W and rear 245/40 91W tires are
mounted on
newly-designed 17-inch alloy wheels, and 11-inch brake discs
in front) provide excellent stopping power and brake feel. For
new brake pad material improves the pedal feel and resists
fading in
high performance driving. An anti-lock braking system is

The exterior styling of the S2000's body is angular, modern
purposeful, with the 2004 model receiving bolder front end and
end styling. Its long hood and flared front fenders create the
impression of lowness and mass. The nose has slightly
aerodynamics for 2004 that involves re-shaping the front
bumper. High
sides reinforce the cockpit-like feel of the interior.

The interior is modern and designed with the driver's needs
mind. The seats contour to provide excellent lateral support
aggressive turns and help minimize fatigue. Outward visibility is

For 2004, controls such as the steering, brakes and clutch,
operate with a new level of precision and have an even more
feel. The aluminum leather-wrapped shift knob and lever,
digital instrument display and separate engine-start button serve
a reminder of the racing heritage of the S2000.

2004 Honda S2000 Roadster Technical Highlights

Advanced technologies used in the S2000:

  • Hybrid monocoque body and "high X-bone frame" has
    and bending rigidity of closed-top vehicle, without excess

  • Highly compact, 2.2-liter, DOHC VTEC engine produces 240
    and 162 lb.-ft. of torque

  • Compact DOHC three-rocker VTEC variable valve-timing
    adjusts intake and exhaust valve duration

  • Coaxial, roller-bearing cam followers

  • Lightweight, powdered-metal, injection-molded, sintered
    steel-alloy cam followers

  • Electric Power Steering system (EPS)

  • F1-inspired digital instrument panel

  • High-efficiency, low-back pressure, metallic-honeycomb

  • In-wheel, 4-wheel double wishbone suspension

  • Impact-absorbing body and frame designed to help protect
    driver and passenger in full-frontal, offset-frontal, side and
    rear impacts

  • 6-speed, transmission

  • Forged-alloy pistons and "dummy head" honed cylinder

  • Heat-treated, carburized forged-steel crankshaft and
    connecting rods

  • Nut-less connecting rods

  • High-intensity discharge (HID) projector headlights

  • Torque-sensing limited-slip differential

  • Long-wearing FRM (Fiber-Reinforced Metal) cylinder

  • Compact "in-wheel" double wishbone suspension

  • Engine meets Low-Emission Vehicle (LEV) standards

S2000 Power and Convenience Features

The S2000 has an impressive list of standard comfort and
convenience features, designed to make driving more pleasant
enjoyable, including high-intensity discharge (HID) projector
headlights, a power-operated convertible top that opens or
closes in
approximately six seconds, air conditioning, micron air filtration,
cruise control, an AM/FM stereo with CD player, remote-operated
controls, power door locks, power windows, power heated side
Immobilizer Theft-Deterrent System and keyless entry for both
and the trunk. For 2004, XM Satellite Radio and headrest
speakers are
available as optional.

Safety Features

The S2000 is designed to comply with various worldwide
standards and boasts an extensive list of safety features,
3-point seat belts with load limiter and pretensioner, a compact
system for the driver and passenger, roll bars and reinforced
windshield posts, and a body and frame especially designed to
absorb the energy of full-frontal, offset-frontal and rear impacts.
Even the hood hinges and windshield-wiper pivots are designed
collapse in order to minimize head injury to pedestrians.
brakes (ABS) are standard.

High-Output 2.2-Liter Engine

In order to give the S2000 an ideal 50/50 weight distribution
a low yaw moment, Honda engineers designed the S2000's
240-hp, 16-valve, 4-cylinder engine to be as small and as
as possible. The engine's aluminum-alloy cylinder head is a
efficient design and features a compact gear- and chain-drive
for the dual overhead camshafts. The ancillary drive system for
alternator, water pump and air-conditioning compressor is also
a new
space-efficient type.

The S2000 engine's highly rigid, aluminum-alloy cylinder
features Honda's long-wearing FRM (Fiber-Reinforced Metal)
liners. The lightweight pistons are made of forged aluminum
alloy and
the forged-steel connecting rods and crankshaft are heat-treated
added toughness. Numerous friction-reduction techniques, such
roller-bearing cam followers, special pistons and advanced
materials, are used in the engine.

A compact version of VTEC (Variable Valve Timing and
Engine Control), Honda's variable valve timing system, is used
on the
S2000 engine. The VTEC system optimizes torque output over
engine's entire operating range, improving both driveability and
performance. The S2000's VTEC uses compact, high-strength,
low-friction, roller-bearing cam followers.

A large-capacity, low-restriction intake system and low
back-pressure exhaust system help ensure free breathing at all
speeds. The exhaust system uses a high-efficiency
catalyst. The new catalyst, combined with the engine's electric
pump-fed, secondary air-injection system, a direct-ignition
and Honda-programmed multi-point fuel injection, contributes to
S2000's engine achieving its LEV status.

Six-Speed Manual Transmission

The S2000 uses a longitudinally mounted, 6-speed manual
transmission, which is built for high performance. Its gearing
ensures strong performance in every gear, and the shift linkage
very direct, with short, precise throws. For 2004, single carbon
synchronizers on all forward gears replace double- and
brass synchronizers in order to provide a more direct shift feel
reduce mechanical loss in the transmission. Other features of
S2000 drivetrain include a compact pull-type clutch with a clutch
delay system, a highly rigid, one-piece propeller shaft and rigid
axle shafts-all designed to reduce drivetrain flex to an absolute
minimum. The Torsen limited-slip differential is a highly efficient
torque-sensing, clutchless type that smoothly transfers torque to
wheel with the most traction, whether cornering or accelerating
in a
straight line.

In-Wheel Double Wishbone Suspension

The S2000's 4-wheel double wishbone suspension system
is a compact
in-wheel design, similar to the type used on racing cars. At each
wheel, rigid upper and lower A-shaped wishbone links carry
loads directly to rigid subframes, attached directly to the newly
reinforced monocoque body.

For 2004, the suspension geometry has been carefully
tuned for
optimum road-holding and steering feel. Coil springs and
gas-pressurized shock absorbers (remote reservoirs in the rear)
used at each wheel. Front and rear stabilizers (1.04 x 0.18-inch
front/1.00x0.18-inch rear) help keep body roll to a minimum.

High X-Bone Frame

Body rigidity is crucial to good handling in an open-topped
roadster, so Honda engineers designed a highly rigid
monocoque body
for the S2000 and strengthened it even more for 2004. The heart
the system is a large central tunnel that runs down the center of
cockpit. This tunnel serves as the backbone and main
structure for the vehicle, as well as a housing for the
and driveshaft.

The body's high side sills, and innovative diagonal (X)
bracing at
the front and rear of the cockpit, provide additional rigidity.
Suspension and drive loads from the wheels are fed directly into
structure via highly rigid subframes at the front and rear of the

Electrically Powered Steering System

In place of a conventional hydraulic system, with its hoses,
and power drain, the S2000 uses an electrically assisted power
steering system. At low speeds, more power-steering assist is
provided, which eases maneuvering and parking. As vehicle
increases, less power assist is supplied, giving the steering a
direct feel.

The S2000 Concept and Development

When Honda designers and engineers began work on the
S2000, they
set several overall design goals for it that would ultimately define
its nature. They wanted it to have race-car-like performance and
handling-something an enthusiast driver could use and enjoy,
even in
everyday driving situations. In addition, they wanted the S2000 to
a modern, socially responsible automobile, with low emissions
and a
full range of safety features.

The S2000's roadster layout also captures the spirit of the
legendary high-performance sports cars of the past, as well as
Honda's very first sports car, the S500 roadster. However, the
makes no attempt to be a retro sports car. It is Honda's own
interpretation of a modern sports car-with high performance,
state-of-the-art technology, comfort, style and Honda

The S2000 and the Honda Spirit

The S2000 is also intended to be a celebration of several
important aspects of the Honda Motor Company's corporate
identity and
spirit. One aspect of that spirit can be found in the company's
history of building sporting automobiles.

From the first S500 to the current Civic Si and the Acura NSX
supercar, Honda has always offered a dedicated performance
Another aspect of the Honda spirit celebrated in the S2000 is the
company's motor sports heritage. Honda started racing
internationally in the 1950s, and entered Formula 1 car racing in
1960s. Today, Honda still participates in the most competitive
prestigious levels of motor sports, including Formula 1, the Indy
Racing League and Grand Prix motorcycle racing. The S2000
incorporates many of the engineering lessons learned in five
of racing.

The S2000 also represents the Honda spirit of innovation.
From the
first CVCC engine to 4-wheel steering, VTEC variable valve
and up to the current SULEV, AT-PZEV and ZEV hydrogen fuel
automobiles and engines, Honda products have always
demonstrated the
company's uniquely creative approach to solving engineering
challenges. The S2000 is no different. It is a showcase of Honda
technologies and advanced engineering techniques applied in a
cost-effective manner.

Honda S2000 Features

The following is a list of the standard features found on the
S2000 roadster:

Engineering Features

  • 240-hp, 2.2-liter, 16-valve, DOHC VTEC engine

  • Multi-Point Programmed Fuel Injection (PGM-FI)

  • Direct ignition system

  • Low-back pressure exhaust system with high-efficiency

  • Low-Emission Vehicle-rated (LEV)

  • 6-speed, manual transmission

  • Torque-sensing limited-slip differential

  • Power-assisted 4-wheel disc brakes with ABS

  • High-rigidity "high X-bone frame"

  • In-wheel double wishbone suspension with gas-filled shock
    absorbers and front and rear stabilizer bars

  • Electric Power Steering system (EPS)

  • Variable-ratio rack-and-pinion steering

  • 17-inch alloy wheels (7.0-inch-wide front/8.5-inch-wide

  • 215/45 R17 87W front tires

  • 245/40 R17 91W rear tires

Exterior Features

  • Electrically powered soft top

  • Aluminum hood

  • High-intensity discharge (HID) projector headlights

  • Body-colored dual power mirrors

  • Dual-outlet exhaust with oval tips

  • 5-mph, impact-absorbing body-colored bumpers

Interior Features

  • Dual airbags (SRS)

  • Air conditioning

  • Micron air-filtration system

  • AM/FM stereo with CD player and XM Satellite Radio

  • Remote-operated audio controls

  • Power windows

  • Power door locks

  • Cruise control

  • Digital instrument panel

  • Leather-trimmed seats

  • Center console storage compartments with sliding lid

  • Dual Beverage holder

  • 3-point seat belts with pretensioner and load limiter

  • Engine start button

  • Immobilizer Theft-Deterrent System

  • Keyless entry system for doors and trunk

Exterior and Interior Colors

  • Grand Prix White/Light Tan

  • New Formula Red/Black

  • Sebring Silver Metallic/ Black or Black and Red

  • Silverstone Metallic/Black or Black and Red

  • Berlina Black/Black

  • Rio Yellow Pearl/Black

  • Suzuka Blue Pearl/Blue

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