Saleen knows all about power. As in S281 Mustangs, N2O Focuses and the S7,America’s first (and still the only) mid-engine exotic supercar. When it went on sale in2002, the S7 was the only street-legal car in the U.S. with more than 500 horsepowerand 500 lb-ft of torque. The media and S7 owners have raved about the car since itfirst smoked the rear tires in anger. And it has been recognized by numerousautomotive magazines as the fastest production car in the world.
But during the past three years the automobile marketplace has witnessed anexplosion of performance with models from manufacturers including Ferrari,Lamborghini, Mercedes-Benz, Porsche and Chevrolet touting power numbers above theonce magic 500 level.
Saleen is not an organization content to rest on yesterday’s 0-60 mph times orquarter-mile speeds. So for 2005 it’s “goodbye S7” and “all hail the S7 Twin Turbo!”
This is the first major change to the S7 since its introduction, and it is a BIGchange as in 750 horsepower and 700 lb-ft of torque, numbers the competition will bechasing for a long while we predict.
What’s New for 2005
It was pretty obvious to Saleen product planners during the late 1990s thathorsepower and torque numbers were trending upwards, especially among thepurveyors of supercars. And power figures that looked spectacular at that time mightseem quite ordinary a few years down the road. So Saleen engineers have beenplanning for this day since they drew the first line on a computer screen for the originalS7’s 7-liter engine.
While there are a number of different roads Saleen’s engine designers couldhave traveled down to achieve those high-altitude horsepower and torque figures, forthis second edition of the S7 they decided to think beyond atmospheric. And becausethis is Saleen, they added a double twist to a tried and true racing technique forboosting power and torque: twin turbos.
Aerodynamics has also come under scrutiny for 2005. Unless you place the newS7 Twin Turbo next to one of the original 2002 models, you probably won’t notice thatthe 2005 version has a different diffuser/rear spoiler package and reshaped frontfenders to enhance the S7s already sleek, swoopy and aerodynamic contours.
To complement the Twin Turbo’s enhanced straight-line performance envelopeThe S7 chassis has also undergone a fair amount of tweaking. Virtually everysuspension pickup point has been changed, and the suspension geometry has beenmodified for less squat and dive during acceleration and braking.
Engine & Drivetrain
Designed by Saleen engineers, the S7's engine and drivetrain incorporate thelatest in modern racing technology. The new all-aluminum V8 engine casting wasengineered and tooled by Saleen to displace seven liters. Redline is 6500 rpm. Spaceage materials and engineering are used throughout, including stainless steel valves,titanium retainers, beryllium exhaust valve seats, an aluminum throttle body, Saleendesignedaluminum CNC-machined cylinder heads and stainless steel exhaust system.
An exclusive Saleen-designed Front Engine Accessory Drive (FEAD) systemresults in an extremely compact engine, allowing for better packaging and overall weightdistribution. The V8 incorporates a unique Saleen-designed side-mounted water pump,a belt-driven camshaft drive and a Saleen-engineered dry sump oil delivery system.
The engine's mid-chassis placement optimizes weight distribution and center ofgravity, making room for an unusually tall engine that allows for a very efficient inductionsystem. Air enters a roof intake, passes through a 90-mm mass air meter and feedsinto a carbon fiber plenum. From the plenum the air is routed to the twin ball bearing turbos, is pressurized to 5.5 psi max and then passes through an oval-bore throttle bodyinto an aluminum intake manifold with eight individual runners.
To feed juice to this setup, the injection system includes dual electric fuel pumpsand high-capacity, return-less, 52 lb/hr fuel injectors.
Neatly engineered and integrated into the S7’s stainless steel, dual, high-flowexhaust system are two, twin-ball-bearing, water-cooled Saleen-Garrett turbos,featuring 44-mm wastegates.
The four exhaust pipes from each bank of cylinders mergeinto a race-car-like high-efficiency collector. In addition, the exhaust incorporates dualcatalysts per cylinder bank, EGR and those aforementioned twin wastegates.And because Saleen believes in power and clean air, the emission controlsystem features dual, heated oxygen sensors per cylinder bank and a high-volumeevaporative emission system along with those four catalysts. Oh, and for goodmeasure and clean air, the system is OBD-II compliant.
When Saleen’s engineers originally laid out the architecture of the S7’s 7-liter V8,they purposely over designed all the major components because they knew the carwould be raced, and they were also planning ahead for future increased streetperformance. So one of the few internal changes to the twin-turbo engine is a swapfrom hydraulic to solid lifters. This change allows the engine to rev higher and “harder.”Solid lifers don’t “pump up” and “float” like hydraulic lifters can at high rpm, and theyalso allow more aggressive cam profiles, which results in more horsepower at the topend. As with the previous hydraulic tappets, the valves are actuated by low-frictionroller rockers.
As is typical with turbocharged engines, the compression ratio has been lowered.It drops from a very high 12.0:1 in the previous naturally aspirated V8 to a still high11.0:1. And for increased durability, Saleen engineers also added oil squirters to coolthe undersides of the pistons.
A Saleen PowerFlash™ performance computer, recalibrated for 2005, handlesengine management. The ignition system is integrated coil-on-plug.
A new-generation six-speed transaxle, with a unique Saleen bell housing,transfers power to the wheels. The clutch is an organic/metallic 8.0-inch, twin-plate unitwith hydraulic actuation.
And if you need any more proof of how Saleen engineers sweat the details, thestroke of the already short-stroke shifter has been furthered shortened for improvedshifting feel. Say that five times fast, once for each gear change!
Chassis, Suspension & Brakes
The S7 chassis and suspension incorporate decades of Saleen’s experience inracing, racecar construction and high-performance road car manufacturing. The SaleenS7 architecture begins with a space frame chassis to which honeycomb compositereinforcing is grafted. The body is structural, aerospace-quality, autoclave carbon fiber.
Suspension is via fully independent unequal-length double wishbones with coiloversprings, lightweight aluminum dampers (shock absorbers) and stabilizer (anti-roll)bars front and rear. The uprights at each corner are CNC machined billet aluminum,flow-through designs that use air to help cool the bearings.
A major improvement in ride is achieved for 2005 with the use of coil springs thatare a dual-stage design. The first spring has a lower rate than the single springs fittedto the current S7, resulting in softer ride during normal street driving. But if youremember your history, you know that the S7 is a flat-bottom, downforce car. The fasteryou go, the more downforce the S7 develops. In the case of the S7’s new dual-stagesprings, the second stiffer spring starts coming into play at around 100 mph when thecar begins to develop serious downforce.
Chassis tuning also includes revised shock valving front and rear.Saleen-engineered Brembo-supplied lightweight aluminum six-piston mono-blockcalipers are fitted front and rear.
The brakes are among the largest of any productioncar with 15-inch vented discs up front and 14-inch vented discs at the rear.
The Saleen-designed forged alloy wheels feature center locking wheel nuts withautomatic safety locks. Sizes are 19 x 9.5 inches up front and 20 x 12 inches at therear.
Geometry changes, along with new tires, result in about a 30 percent increase inmechanical grip . . . which is substantial. In a seeming contradiction to currentperformance tire practice, the 2005 S7 Twin Turbo is fitted with “taller” tires,275/35R19s up front and 335/30R20s at the rear, replacing the 275/30R19s and345/25R20s fitted to the normally aspirated S7. While the Michelin Pilot Sport PS2 tireshave higher aspect ratios, they also lay tire patches that are nearly an inch wider upfront and almost 1.5 inches wider at the rear.
Body Design
The S7’s beautiful shape was “designed” by the wind. Optimal aerodynamics and topspeed performance objectives were achieved with extensive wind tunnel work. Targetsincluded a low coefficient of drag, optimum drag-to-lift ratio, and extreme down force.The S7 has “full tray” body sculpting underneath.
Longtime Saleen design consultant, Phil Frank, and Steve Saleen thenpersonalized and refined the aesthetics of the S7 to reflect modern supercar thinking.The gill-like ducting is, of course, fully functional. The autoclaved carbon fiber bodypanels incorporate advanced aerodynamics and include integrated split-channel airflowthroughout the car, full underside air management, and advanced front tray and sideskirt designs and an integrated full-body rear spoiler, replacing the wing usedpreviously.
For the 2005 S7 Twin Turbo, the redesigned front and rear diffusers, along withthe new rear spoiler, result in a 40 percent reduction in aero drag and a 60 percentincrease in down force. Those of you who know anything about aero forces recognizethe significance of that last statement. Typically, you would have to trade down force toreduce aero drag.
The mid-engine Saleen S7 has front and rear trunks and comes with MulhollandBrothers® custom-made, 3-piece, fitted luggage. In true supercar style, the doors openup and away from the body.
“When seen in person, the S7 has an amazing overall presence,” says Steve Saleen, founder and president of Saleen, Inc. “It’s quite long and wide, yet only 41.0inches high, adding to its exotic appearance. We wanted to maintain a ‘form-followsfunction’look, but one that was esthetically beautiful as well. I really feel we’veachieved both.”
Interior
As much care has been given to the creature comforts of the Saleen S7 as to itsperformance. Great attention was given to seating position. The car featuresasymmetrical seating, with the driver position moved slightly more to the center than thepassenger. This improves the driver’s ergonomics and the side-to-side weightdistribution. Because the S7 features a custom fitted driver seating position with6adjustable pedals and a tilt and telescoping steering wheel, it comfortablyaccommodates tall drivers. While Shaquille O’Neal would have a tough time fittingbehind the wheel of an S7, drivers as tall as 6 feet 6 inches can enjoy the S7 drivingexperience.
To further improve driving comfort and ergonomics, the S7 Twin Turboincorporates a revised pedal box. The clutch and throttle lever ratios pedals have beenchanged for lighter pedal efforts. In addition, the three pedals have been spaced fartherapart without impinging upon the dead pedal.
Seats and other interior surfaces are covered in elegant leather and suede. Airconditioning, power windows, power door locks with remote keyless opening for thedoors and both trunks, an electric-headed front windshield, variable intermittentwindshield wipers, a leather-wrapped steering wheel and an AM/FM/CD/DVD/TVsystem are all standard. The Saleen S7 also has one unique interior feature: a video“rearview mirror” — there is a small video camera inconspicuously mounted in the rearof the car.
A navigation system and polished wheels are among the few available features.
Background
The Saleen S7, America’s first true supercar, has captured the imagination of theautomotive world since its introduction in August 2000 at the prestigious MontereyHistoric vintage car races. Designed to compete with the fastest, quickest, besthandling and most exotic sports cars, the S7 provides a distinctly American drivingexperience for the fortunate few who will own one. It also reflects Saleen’s more thantwo decades of performance and engineering excellence in manufacturing fully certifiedhigh-performance automobiles.
The exotic S7 is designed, engineered, manufactured and marketed by Saleen,Inc., a high-performance vehicle manufacturer headquartered in Irvine, Calif. Workingwith some of the world’s most respected and technologically advanced automotivesuppliers, the Saleen S7 went from prototype to first customer deliveries in less thantwo years.
Dual Personality
The Saleen S7 Twin Turbo was conceived to combine the performance of atrack-only racecar with the driving pleasure of a road car. As a result, while the S7would be at home on any racetrack, it is also a car that can be driven with pleasure onhighways, Autobahnen and back roads.
“With the improvements made in engine performance, chassis tuning and aero,the S7 is not only easier to drive at ‘normal’ around town speeds, but also it’s faster andmore fun,” says Steve Saleen.
But don’t expect less of the Saleen ‘attitude.’ The S7, like every Saleen, is aproduct of Saleen’s strong racing heritage.
“We wouldn’t feel we’d accomplished our mission if you didn’t come away from adrive around the block thinking the S7 felt like ‘a race car for the street,’” Saleencontinued. “We designed it that way.”
Racing Successes
Unlike most exotic supercars, the racing version, the S7R, has already provenitself on the international motorsports stage. During the past three years, the racingversion has won more than 50 poles, set fastest race lap over 50 times and has beenvictorious well over 40 times, winning seven GT Championships. This incredible recordincludes winning the prestigious 12 Hours of Sebring and setting a new track record atthe famed 24 Hours of Le Mans.
Last September, the S7R scored one of its most memorable wins, taking thevictory in round eight of the 2004 FIA GT Championship. The S7R has won a numberof FIA GT races so that victory stands as one among many. What was more significantis that the race took place at Imola, Italy, home track of Ferrari and Maserati, and thebig story that weekend was supposed to have been the heralded debut of the MaseratiMC 12s. Instead, Saleen S7Rs dominated qualifying, placing 5 cars in the top 10 andadded insult to injury when the Vitaphone S7R finished the race with a 43-secondadvantage over the second-place Maserati. It was not a happy day for Ferrari-Maseratimanagement or any of the Ferrari, Maserati and Lamborghini racing teams.
Best-in-Practice Design
While the S7 is an American supercar, the vehicle itself reflects a “best-inpractice”philosophy, where Saleen has incorporated superior components from aroundthe globe in order to manufacture the best vehicle possible. For example, the SaleenS7 uses Saleen-engineered/ Brembo-supplied brakes from Italy as well as numeroushigh technology pieces from companies located in the Midlands area of the UnitedKingdom, a region that is to motorsports what the Silicon Valley is to computers. Initialwind tunnel testing was conducted at the University of Glasgow in Scotland.
Marketing
None of the S7’s major supercar competitors, such as the Ferrari Enzo, theMcLaren F1 and the Maserati MC12, are a match for the S7 Twin Turbo’s prodigioushorsepower and torque figures: All are at least 100 bhp and more than 200 lb-ft inarrears of the S7. Chalk up another victory for good old American V8 engine ingenuity.
It’s also no contest when it comes to price. The Manufacturer’s Suggested RetailPrice (MSRP) for the 2005 S7 Twin Turbo is $555,000. That’s $100,000 less than anEnzo (which is out of production and escalating in price) and nearly $300,000 fewerdollars than the Maserati. And you could have Her and His S7s for the price of theMcLaren F1!
When it comes to performance AND value, nothing on his planet can come closeto matching the S7 Twin Turbo.
Source: Saleen Press Release
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