Tandy and team-mate Mathieu Jaminet won two races in the new GTP category this year and had a third taken away following a technical infraction found in post-race scrutineering at Watkins Glen.
Porsche has identified the longer-distance races as where it needs to focus its efforts and has made a number of updates aimed at improving reliability with its 963 prototype.
“There’s been lots going on with the car and at [Porsche’s development center in] Weissach,” Tandy told Autosport. “It’s mostly based around reliability.
“We’re trying to iron out the flaws that we’ve found in both software and hardware. Looking back at last year at the four longer endurance races, including Daytona and Le Mans, we weren’t that great, were we?
“This is the first thing, we need to finish these long races, so that’s been the main focus. We’re obviously better prepared from a reliability point of view. Of course, everyone is still going to have some issues, all the cars are still pretty new, but it’s definitely a better feeling now.”
Source: Autosport