Stoner in secret practice Off his bike ... Casey Stoner will become a junior teammate of V8 champions Jamie Whincup and Craig Lowndes. FORMER world motorcycle champion Casey Stoner has secretly trained at the daunting Mount Panorama track at Bathurst as part of his intensive preparations for his V8 Supercar debut at the end of the month. Amid concerns that Stoner will begin his car-racing career at a very high level with no four-wheel competition experience, he has been practising extensively in different types of race-style sedans in addition to trial runs in his Holden Commodore V8 Supercar. Fairfax Media has learnt that as well as regular training sessions at a private circuit, Stoner took part in a track day at the 6.2-kilometre Mount Panorama course on Tuesday. The 27-year-old winner of the 2007 and 2011 MotoGP world titles attended a V8RACE Experience day at the Bathurst circuit, driving souped-up V8 Ford Falcons and Holden Commodores equipped with racing modifications and safety equipment. He received driving tips from racing-experienced instructors including four-time Bathurst 1000 winner Greg Murphy and V8 legend John Bowe, who is understood to have spent a lot of time with Stoner outlining the tricks and traps of V8 Supercar racing. Stoner, who quit MotoGP at the end of last season, is tentatively embarking on a long-term second racing career in V8s by contesting the second-tier Dunlop Series, which is the training ground for the main V8 Supercars championship. He is racing a Commodore run by the V8 championship-winning Triple Eight Holden team, essentially becoming the junior teammate of V8 champion Jamie Whincup and series superstar Craig Lowndes. Stoner's car will even run in the same new Red Bull Racing Australia colours of Triple Eight's latest VF Commodores. But unlike Whincup's and Lowndes's machines, which are built to V8s' new Car Of The Future rules, his car will be one of the team's racers from last year, which continue to be eligible for the development series. Stoner's introduction to car racing will be in the main support races at the season-opening Adelaide 500 from February 28-March 3. Despite his derring-do and success in grand prix motorcycle racing, concerns have been expressed about Stoner entering car racing at a high level without any four-wheel competition experience at a hazardous track in a ruthlessly competitive series known for rough racing. He was granted a full car-racing licence by the Confederation of Australian Motor Sport (CAMS) without taking part in minor races, avoiding the normal qualification level of being observed at three events. But motor sport officials and the Triple Eight team's management are satisfied that Stoner's experience and status in MotoGP, along with extensive training and testing, mean he will adapt easily and safely to racing V8s. He completed a test day in his Commodore at Queensland Raceway on Monday and will return to the track this week for more trials. He has been regularly hot-lapping V8 racer-style school cars at an advanced driver training track on the Gold Coast. Triple Eight racing chief Adrian Burgess said: "We're not putting pressure on him to win straight away. The point of this year is to see if he likes V8 racing.