After a few starts and stops, California's PR1/Mathiasen Motorsports has committed to making the move to IMSA's Prototype category in 2017. The perennial ALMS and WeatherTech SportsCar Championship PC contenders have been close to parking its ORECA FLM09-Chevrolet in favor of an LMP2 car on more than one occasion, and...

With a new era set to debut in IMSA's top WeatherTech SportsCar championship class in 2017, the series is also considering the reintroduction of Pro-Am rules for a portion of its Prototype field.In a nod to Grand-Am's former Trueman-Akin subcategory for non-professional drivers, RACER has learned IMSA could implement a...

IMSA entrant Michael Shank Racing and Honda tested the HPD ARX-04b prototype on Thursday at Sebring after the issue-plagued prototype sat for more than a year awaiting improvements. The early prognosis was very positive, according to the team's owner. (Watch video footage from the test at the end of this...

2015 was a painful affair from start to finish for Scott Sharp. His Tequila Patron ESM team endured a combined season of FIA World Endurance Championship and IMSA TUDOR United SportsCar Championship action where everything that could go wrong did go wrong. The year started with the late and disastrous...

IMSA has released its baseline Balance of Performance table for the upcoming Roar Before the 24 test at Daytona International Speedway. The settings for minimum weight, air restrictor sizes, and other performance balancing methods have been outlined for all four classes comprising the WeatherTech SportsCar Championship based on the findings...

Honda Performance Development's newest prototype is closing in on a full-time return for the 2016 season. RACER has learned the HPD ARX-04b P2 chassis, which made its debut at January's Rolex 24 at Daytona, and was parked weeks later due to aerodynamic deficiencies, is being prepared for a dedicated campaign...

Honda has officially confirmed its plans to run an HPD ARX-04b LMP2 coupe in the Pikes Peak International Hill Climb on June 28, as first revealed by RACER last month.Honda has run a variety of machinery at the iconic hill climb event in recent years, ranging from the Acura NSX...

The Tequila Patron ESM squad gave its pair of Ligier coupes a shakedown today ahead of their race debuts in this weekend's round of the World Endurance Championship at Spa.The team, which ordered the cars after abandoning the new-for-2015 HPD ARX-04b in early March, ran the HPD/Honda-powered JSP2s at Magny-Cours...

The RACER Channel brings you trackside at Sebring as Audi tests its brand-new R18 e-tron quattro World Endurance Championship LMP1-Hybrid challenger and shares the track with the Tequila Patron ESM HPD ARX-04b P2 team.

Audi Sport Team Joest tested its 2015 R18 e-tron quattro LMP1 hybrid at Sebring International Raceway on Wednesday alongside the Tequila Patron ESM HPD ARX-04b and Nissan GT-R LM NISMO, as they prepared for the upcoming World Endurance Championship. Click on the thumbnails for larger images.{igallery id=2922|cid=279|pid=9|type=category|children=0|addlinks=0|tags=|limit=0}