Toyota GT-One

Racing car
Car_name=Toyota GT-One


Category=LMGTP
Constructor=Toyota Motor Corporation
Designer=Andre de Cortanze
Team=Toyota
Drivers=
Chassis=Carbon fiber and aluminum honeycomb monocoque
Front suspension=Independent double wishbone pushrod system
Rear suspension=Independent double wishbone pushrod system
Engine name=Toyota
Capacity=3.6 liter
Configuration=90-degree V8
Turbo/NA=twin-turbo,
Engine position=mid, longitudinally mounted
Gearbox name=TTE
Gears=6-speed
Type=sequential manual
Differential=
Tires=Michelin radial
Fuel=
Debut=
Races=
Wins=
Cons_champ=
Drivers_champ=
Poles=
Fastest_laps=The Toyota GT-One (also known in Japan as the Toyota TS020) was a racing car initially developed as a racing car for grand touring style rules, but later adapted into a Le Mans prototype. It raced in the 1998 and 1999 24 Hours of Le Mans.

History

Following the end of the Group C era around 1994, Toyota decided to alter its plans in sports car racing by moving to the production-based GT classes for 1995. Toyota decided to approach this in two ways by using two different styles of car for competition. The first was a heavily modified Toyota Supra, referred to as the Supra LM, which would use a turbocharged inline-4. The second entry was a custom built car designed specifically to be a racing car, yet required a small number of production cars for sale in order to meet homologation regulations. This car was modified heavily from the Toyota MR2, and became known as the SARD MC8-R. The MC8-R would use a custom built Toyota turbocharged V8. While the Supra performed admirably in 1995, the MC8-R would appear superior for 1996. With development of high powered supercars for the GT classes at the time, Toyota decided that a car similar to the MC8-R, which was intended as a race car first, would be better suited to continuing Toyota's development of a GT car. Thus Toyota announced they would skip the 1997 24 Hours of Le Mans to be able to develop their new GT car for 1998.

Turning to Toyota's European arm based in Cologne, Germany, Toyota Team Europe (TTE) was charged with development of the new GT car. With taking the one-year hiatus, TTE was able to look at what the competition was developing for the GT class, and exploit it to their benefit. In 1997, both the Mercedes-Benz CLK GTR and the Porsche 911 GT1 were dominant cars in their class that exploited loop holes in the rules in place at the time. Each car was a custom built super car of which only a small handful of production cars were built to homologate it. TTE realized that they would actually only need to build a single production car in order to meet homologation regulations, thus allowing TTE to have a car that would never truly be sold to a customer, meaning that any driver luxuries could be left out.

Second, Toyota learned about a loophole which Mercedes-Benz had exploited. All GT based cars were required to have storage space, capable of holding a standard sized suitcase, in order for the car to be considered not only production based, but usable by the public. Mercedes exploited this by putting a small cubby hole into an unused area underneath the rear bodywork, although it was not as easy to access as a normal trunk. Toyota, in their interpretation of the rules, were able to convince Automobile Club de l'Ouest (ACO) officials that the car's fuel tank, normally empty when the car is scrutineered before the race, was allowable as a trunk space since it could, theoretically, hold a suitcase.

With these loopholes in place, TTE was able to set out in laying-out the GT-One. TTE designed and manufactured the car's carbon fiber chassis and bodywork in-house, while Toyota supplied an upgraded version of the engine they originally used on their Group C cars, the R36V 3.6L Turbo V8.

TTE also developed the only two GT-One road cars built, required in order for the race car to qualify as a road car-based Grand Tourer. They were painted red and fitted with a basic interior. One was put into a museum in Japan.

Racing results

Introduced in time for Le Mans in 1998, the GT-One first appeared at the official testing days for the race held in May. Three GT-Ones appeared, setting the 2nd, 5th, and 10th best times, easily beating out custom built prototypes which were meant to be the superior class. For the race week itself, all three cars performed admirably in qualifying by continuing their quick pace, qualifying 2nd, 7th, and 8th, being beaten only by their GT class competitor, Mercedes-Benz.

For the race itself, the GT-One unfortunately suffered. GT-One #28 suffered from a high speed accident halfway through the race, taking it out of competition. The two other entrants continued to fight on, both remaining in the top 10. However, within the closing hours, the higher ranked GT-One #29 suffered a gearbox failure while in competition for the race win. Thus Toyota was left to take 9th place in the race with the lone #27 entry, which ended the race 25 laps behind the winning Porsche 911 GT1.

Following the success of the GT1 class as a whole over Le Mans prototypes, the ACO and FIA moved to change the regulations for the GT classes, requiring a large amount of production vehicles for the GT classes, thus eliminating the original loopholes in the system. Thus Toyota was forced to make changes to the GT-One, as were all its competitors in the class. Mercedes-Benz opted to evolve their CLK-GTR into the new custom built CLR in the closed cockpit GTP class, while Nissan and Panoz opted for open cockpit LMPs. Porsche dropped out of competition altogether. Newcomer Audi decided to build cars for both the GTP and LMP classes, while BMW continued in the LMP class as before. Toyota decided to follow the route of Mercedes and evolve the GT-One into a GTP class prototype. Although the CLK-GTR required extensive modifications to become the CLR, the GT-One was already close enough to a prototype that extensive redesign was not needed.

Toyota began an extensive testing program, including a long distance test at Circuit de Spa-Francorchamps in Belgium soon after a snowfall. In the official testing session at Le Mans, the GT-Ones were again fast, taking the 1st, 3rd, and 5th fastest lap times. This pace continued in qualifying for the race, as the three GT-Ones took 1st, 2nd, and 8th positions.

Throughout the race the GT-Ones battled for the lead, having it switch multiple times amongst the top competitors. Unfortunately the GT-One was suffering from failures of its Michelin tires throughout the race, mostly caused by sharp gravel which had been accidentally brought onto the racing surface by other cars. The design of the GT-One's wheel wells allowed for a blown tire to cause extensive damage to the mechanical linkages inside. Thus after only 90 laps the first GT-One was lost when it suffered an explosive tire puncture and was damaged beyond repair, unable to return to the pits and abandoned on the track. Halfway into the event, another GT-One was lost in a tire puncture that led to a high speed accident, destroying the car. This left the team with only car #3, which was still running at the top of the field. At this point a large amount of the competition had been eliminated, with all Mercedes out of the race due to their famous accident and withdrawal. Audi had also lost two of their four cars, and Nissan had lost their factory backed R391, although an older Courage C52 campaigned by the team was still active. BMW and Panoz were the only teams continuing without major problems.

During the final hour of the race, the lone GT-One was leading the race, just ahead of a BMW and two Audis. While lapping traffic the GT-One suffered a tire failure, and was forced to slowly make its way around the track to return to the pits for a new set. In the process the GT-One lost the lead, and thus lost the race. The lone GT-One would come home 2nd overall, one lap behind the winning BMW. As a consolation prize, the GT-One would win the GTP class, although it was the only car in the class to actually finish.

The GT-One would race only once more, a single entrant appearing in the 1999 Le Mans Fuji 1000km. Although the race mostly consisted of Japanese teams, thus leaving out most of the manufacturers that had competed at Le Mans, Toyota still had to compete against rival Nissan, who also entered their R391. In the end the GT-One would fall short once again, finishing 2nd and only one lap behind the winning R391.

The GT-One program would not be continued into 2000, Toyota instead turning TTE into leaders of the new Toyota F1 team. This would mark the end of Toyota's attempts at Le Mans, which had started in 1985.

The GT-One was sponsored by Marlboro in 1999 (Hence the white chevron with red body) despite the anti-tobacco laws in France which meant no Marlboro logos appeared on the car anywhere. In pictures of practice sessions, you can see the Marlboro barcode across the front of the car which also appeared on the Ferrari Formula One cars during tobacco legislated grand prix. This didn't appear on the final race car either. Other sponsors included Zent (Number 1 Car), Venture Safenet (Number 2 Car) and Esso (Number 3 Car).Fact|date=July 2008

Chassis

A total of seven GT-Ones were built in total over the two years of the program. The first six were built in 1998, while the final chassis was built in 1999.

* LM801 - Developmental prototype, never raced.
* LM802 - 1998 24 Hours of Le Mans #29, later a test car.
* LM803 - Road legal version of the GT-One, on display in Europe.
* LM804 - 1998 24 Hours of Le Mans #28, 1999 24 Hours of Le Mans #3, later on display in Japan.
* LM805 - 1998 24 Hours of Le Mans #27, later a test car.
* LM806 - 1999 24 Hours of Le Mans #2.
* LM907 - 1999 24 Hours of Le Mans #1.

LM804 was not only the only car to race in both 24 Hours of Le Mans, but also the only car to finish either 24 Hours of Le Mans.

Road Car Technical Data

;Engine: Toyota R36V, 3.6 Litre Twin-Turbo V8 (600 HP @ 6000 RPM, 479 lbf-ft @ 6000 RPM) - some sources claim the 1999 Race car model to have had 700 HP;Gearbox: TTE Six Speed Unsynchronized Sequential Manual transmission;Suspension: Four-wheel independent, double wishbones front and rear;Dimensions: 484 cm overall length, 200 cm overall width, 900 kg weight;0-60 mph: 3.6 Seconds ;0-100 mph: 5.9 Seconds ;1/4 Mile Elapsed Time: 10.7 At 142 mph ;Top Speed: 236 mph (380 km/h)

The Toyota GT-One has been clocked at 345 km/h (214.28 mph) Fact|date=March 2008 in practice on the Mulsanne Straight at Le Mans 1998 and even at 352 km/h (218.73 mph) Fact|date=March 2008 at Le Mans 1999 test days and its actual top speed (with low downforce, as it was set up for Le Mans 1999) is somewhere around 380 km/h (236.13 mph) Fact|date=March 2008.

References

External links

* [http://www.carpages.co.uk/toyota/toyota-goodwood-festival-of-speed-17-03-05.asp Toyota Racing Icons]
* [http://tamiya.com/english/products/24222gt_one/020.htm Toyota GT-One model kit]
* [http://www.mulsannescorner.com/gtone.html Toyota GT-One specs and photos]
* [http://wspr-racing.com/chassis/grc/ChassisToyota.html GT-One chassis numbers and history]