Detroit Thursday Notebook

***The latest round of Balance of Performance adjustments on the Cadillac DPi-V.R has reportedly cost the car upwards of 400 pounds of downforce, and roughly 20 horsepower. The Cadillacs are running with a 0.6mm smaller air restrictor this weekend, along with significant aero restrictions.

***Wayne Taylor Racing tested in the revised configuration at Watkins Glen last week, prior to arriving at Bell Isle.

***Among those also testing at Watkins Glen were GT Le Mans teams Porsche GT Team and BMW Team RLL, the GTD points-leading No. 33 Riley Motorsports-Team AMG Mercedes AMG GT3, the No. 43 Keating Motorsports Riley Mk. 30 Gibson, to be shared at Le Mans by WeatherTech Championship regulars Ben Keating, Jeroen Bleekemolen and Ricky Taylor, and CORE autosport’s Porsche 911 GT3 R.

“The test was a great opportunity to get our Porsche 911 GT3 R on track at Watkins Glen for the first time ever,” said driver Colin Braun, who has been with CORE since 2012. “We had great weather both days and [co-driver] Jon (Bennett) and I were able to turn a ton of laps.”

***CORE autosport has a busy weekend ahead of it, as the team will take part in both the WeatherTech SportsCar Championship race at the Detroit Belle Isle Grand Prix and the latest round of the Red Bull Global Rallycross Lites Championship in Thompson, Conn.

***Jon Bennett and Colin Braun will share the No. 54 Porsche 911 GT3 R on the streets of Belle Isle in the 100-minute WeatherTech Championship race on Saturday, then immediately after the checkered flag the duo will rush to the airport to board a plane bound for Connecticut, where the GRC round will already be underway. If all goes according to plan, Bennett and Braun will have time to join the Last Chance Qualifying.

***Speaking of busy, Christina Nielsen and Scuderia Corsa will kick off a string of four races across three countries and two continents this Saturday in Detroit. Immediately after the Detroit race, Nielsen, along with teammates Alessandro Balzan and Bret Curtis will fly overnight to France to compete in the 24 Hours of Le Mans, followed by WeatherTech Championship races in Watkins Glen and Canadian Tire Motorsport Park.

***The Detroit weekend is the home race for 3GT Racing which is based 100 miles Northwest in East Lansing, Mich., where drivers Sage Karam and Jack Hawksworth are also living this year.

***Just two teams have claimed the five trophies for overall wins at Detroit since the first Grand-Am race in 2012. Action Express Racing claimed victory in ’12 with Darren Law and Joao Barbosa, and again in 2015 with Eric Curran and Dane Cameron. Wayne Taylor Racing took the win in 2013 with drivers Jordan Taylor and Max Angelelli, and returned to victory lane in 2014 and 2016 with Jordan and Ricky Taylor.

***WeatherTech SportsCar Championship Prototype class teams will be allotted seven sets of tires, including dry and wet tires, while Prototype Challenge and GT Daytona teams will receive six sets. In all, Continental has over 1300 tires on hand for the weekend.

***The 100-minute Chevrolet Sports Car Classic is scheduled for 12:40 p.m. ET with live television coverage on FS2 starting at 12:30 p.m. ET.

John Dagys contributed to this report.