Three submodels were produced. The MT900R was a racing version of the MT900. The basic car was updated as the MT900S for 2005, with the MT900S Photon being an optional performance package. The original MT900 was introduced in 2001 and the MT900S finished production in May 2011. Components for 25 MTs were produced as of January 2005, though only about 35 road cars and 50 racing versions have officially been completed (c.20 of which are MT900S). The MT900 was the replacement for the Mosler Raptor.
The MT900 was designed by Rod Trenne, who previously worked on the Corvette C5. The initials were for Mosler, Trenne, and the car's 900 kilogram (1984lb) target weight.
The MT900 used a carbon-fiber chassis with a LS6V8 engine mounted amidships, powering the rear wheels. Power output is 350hp (260kW), with 350lb⋅ft (470N⋅m)torque.[1] A ZFtransaxle, designed for Porsche, was mounted upside down to allow the engine to sit in front of the rear axle.
The original MT900 weighed 1,175kg (2,590lb), much more than the target weight, but could still accelerate to 60mph (97km/h) in 3.5 seconds according to Car and Driver.[1] The MT900 they tested could also do a 12.0 second quarter mile at 118mph (190km/h),[1] and they recorded a top speed of 150mph (240km/h),[citation needed] limited by the redline. The MT900 pulled 1.02g on the skidpad.[1] The U.S. Environmental Protection Agency (EPA) estimated 19mpg‑US (12L/100km; 23mpg‑imp) and 28mpg‑US (8.4L/100km; 34mpg‑imp) in city and highway driving, respectively.[citation needed]
The car had a somewhat plain exterior designed for aerodynamics, with a low 0.25 coefficient of drag. List price was US$164,000. Sales were certainly slow, and only a single prototype was produced.[citation needed]
Introduced at the same time as the basic MT900 was the race-ready MT900R. It was designed for use in various international motorsports series for an estimated price of $119,000. The MT900R made its competition debut at the 2001 24 Hours of Daytona, and would be campaigned by a factory Mosler team for the full season of the Grand American Road Racing Championship. The entry finished the year ninth in their class championship.
For 2002, the French Perspective Racing team would become the full-season entry in Grand American and saw an improvement in performance. At Daytona the MT900R finished 13th overall and fifth in their class before winning at the next round at Homestead-Miami Speedway, helping the team to third in the championship. Rollcentre Racing and Balfe Motorsport (with aid from Rollcentre) would bring the Moslers to Europe in 2003, starting the British GT Championship year strong with three straight one-two finishes, before finishing the year with four more victories. The Rollcentre squad edged out Balfe for the championship that year. In Grand American, the Moslers were moved to the faster GTS class, but Perspective Racing improved on the previous year's Daytona effort with a ninth-place finish and the class victory. Mosler Automotive would take one more victory that season.
Martin Short's Rollcentre Racing team also took their MT900R to a second-place finish in the inaugural Bathurst 24 Hour in 2002 at the famous Mount Panorama Circuit in Bathurst, Australia. Rollcentre backed this up in the 2003 race with a fifth-place finish. The MT900R proved very quick on the circuit's Mountain and Conrod Straight's (both over 1km in length), with Short finding he was able to match the speed of the Holden Monaro 427C's which used an Australian developed version of the larger 7.0L (427cui) V8 engine used in the Chevrolet Corvette C5-R's at Le Mans, as well as the 6.0L V12 powered Lamborghini Diablo GTR.
Rollcentre and Balfe would continue in the British GT Championship in 2004, although Balfe would also enter the Spanish GT Championship. The Moslers would struggle in British GT and score no wins, but Balfe was able to earn two victories in Spanish GT, winning the drivers' championship by a mere point. 2005 would see Balfe entering the FIA GT Championship, although the car was not homologated and could not fight for points. Rollcentre would go on to win the Britcar 24hours at Silverstone. Escuderia Bengala and Escuderia Motor Terrasa would compete in Spanish GT, while Eclipse Motorsport and Cadena GTC took over British GT competition.
MT900 GT3
Launched in late 2006, the Mosler MT900 GT3 was an attempt by Rollcentre Racing to adapt the MT900R for compliance to the new FIA GT3 category used in various championships. However, the lack of production Moslers led to the FIA rejecting the homologation and forcing Rollcentre to turn elsewhere. The car is allowed into the International GT Open, Australian GT Championship and Belcar series along with the British GT championship which runs to GT3 rules, but has not been approved for other series which use the GT3 category. MT900R GT3's use the LS7 7.0L V8 (427cui) rather than the LS1 5.7L (350cui) version from the original MT900R.
The MT900 underwent several changes to become the MT900S, with 435hp (324kW)[citation needed] from its Corvette Z06-derived LS6 V8. The car weighs 998kg (2,200lb) without fuel.[citation needed]
An early prototype MT900S, despite being up 177kg (390lb) and down 65hp (48kW) from the production version, posted a 0-60mph time of 3.5 seconds and a quarter-mile time of 12 seconds flat.[citation needed]
A newer edition with 600bhp (447kW) accelerated 0 to 60mph (0 to 97km/h) in 3.1 seconds in a Car and Driver test in early 2006.[2]
In June 2005, Mosler announced that they had reached EPA and California Air Resources Board (CARB) certification on the MT900S, allowing road car sales to begin in the United States. The price was set at $189,000 with two examples having been built as of January 2005. American filmmaker George Lucas took delivery of the first street-legal MT900S in December 2006.[3]
A MT900S Photon variant is available which adds a Hewlandtransmission, thinwall subframes, Dymag carbon fiber magnesium wheels, titanium springs, and carbon fiber seats and bodywork, reducing the car's weight to just under its initial target at 898kg (1,980lb).[citation needed] As of January, 2011, a second Photon had been built and was sold for use in the United Kingdom.
In 2010, Mosler announced they would release a facelifted version of MT900, based on the MT900M which participated in 2010 Super GT season. A rendering was made of the facelifted MT900 which was as far as the redesign progressed. In May 2011 production was stopped and the factory closed down.
In 2010 Super GT season, the MT900M made its debut at the second round of the season in Okayama by Thunder Asia Racing, a GT300 team based in Singapore. Unlike the other MT900 entered in previous Super GT seasons, it uses a 3.4-liter V8 Judd-powered engine and an aero kit specified for the GT300 class regulations.
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