Prototype Challenge Lime Rock Park Friday Notebook
Friday, July 21, 2017

The tightly wound surface of Lime Rock Park’s 1.474 mile, 7-turn Road Course created a balancing act for the LMP3 and MPC classes in the IMSA Prototype Challenge Presented by Mazda series Friday. The combination of open- and closed-cockpit, nimble Prototypes completed two rounds of practice in preparation for the Continental Tire Road Race Challenge, a 45-minute sprint on Saturday in conjunction with IMSA’s WeatherTech SportsCar Championship.

And like the WeatherTech series, the Prototype Challenge cars utilized the chicane, on the bottom of the hill at the end of the backstraight in Turn 5, rather than the normal, classic course.

The tight twists and turns evened out class competition, as Kyle Masson in his No. 18 MPC Elan DP02 of Performance Tech Motorsports set the fastest time in the first practice session of the day of  50.595 seconds to edge out the higher-horsepower LMP3 Ligier JS P3 entry of Kenton Koch and P1 Motorsports.

Flipping the script in the second practice session, it was Colin Thompson in his No. 14 Norma M30 Kelly-Moss Road and Race entry that stepped up the pace and hit a time of 50.389 fourteen laps in, to overtake Masson’s blazing lap times and push himself to the top of the charts.

Masson was undaunted however, and ended his day in second position overall in combined results behind Thompson, proving that Lime Rock’s tight and twisting terrain is a great equalizer for the Prototype Challenge entries.

Koch remained consistent throughout practice, setting his best time in the morning session, resulting in a fourth-place position overall as he looks ahead to qualifying Saturday morning.

Backing up Masson in the MPC class was the No. 72 of Tazio Ottis of JDC Motorsports, who jumped from eighth overall in the morning session, to fourth in combined and final practice.

The results create an unusual pattern of alternating classes, with Masson and Ottis pushing the MPC cars into the top five overall and forecasting potentially diverse qualifying results for Saturday’s 20-minute session.

For more information on all IMSA competition - or to access IMSA Radio, which will have live streaming audio of both races - visit

The race will be live streamed on and delayed TV coverage of the race will air on FS2 (FOX Sports 2) August 24 at 8 p.m. EDT. The broadcast will also be available on YouTube 24 hours after it airs on television. 

For more information about the IMSA Prototype Challenge Presented by Mazda series, visit, follow hashtag #IMSAPC @IMSA on Twitter or IMSA on Facebook.

Schedule (all times ET):

Qualifying: 9:05-9:25 a.m. Saturday, July 22

Race: 12:50-1:35 p.m. Saturday, July 22

Race Coverage: 

Live Streaming: The race will be live streamed at 

Live timing: All on-track sessions at and on the official IMSA App for iOS, Android and Windows