In the days following one of its most competitive races of the season, IMSA has made changes to its WeatherTech SportsCar Championship Balance of Performance tables for this weekend’s visit to Canadian Tire Motorsports Park.
Leaving Watkins Glen where the first spec WEC LMP2 victory since September of 2017 was recorded, IMSA has loosened the reins on three of the four Daytona Prototype international models in the field. Only Acura, with its speedy ARX-05 DPi, was left untouched for the WeatherTech Championship’s lone trip to Canada.
Cadillac’s DPi-V.R has received a modest increase in power with new air restrictors (+0.3mm, now 30.7mm total) that feature larger openings. The trio of Cadillacs entered by Action Express Racing and Wayne Taylor Racing have also been given an extra two liters of fuel capacity (now 64.0 liters).
Mazda Team Joest’s RT24-P DPis have received boost increases toward the top of its rev range (from 6500-9100rpm) and will have three additional liters of fuel (now 74.0 liters) to consume.
Tequila Patron ESM’s Nissan Onroak DPis have been given a similar concession with top-end boost increases (from 6200-7600rpm) and one more liter of fuel capacity (now 76.0 liters).
IMSA, as it has practiced since the the cars were introduced in 2017, does not make engine, fuel, or aero BoP adjustments to the WEC P2s on the grid.
In GT Le Mans, BMW Team RLL and Corvette Racing are hoping Victory Lane beckons in the days ahead.
BMW’s new M8 GTE, the only full-time GTLM model without a win after five races in 2018, has been handed more boost through the majority of its rev range (3500-7500rpms), and will have two more liters of fuel (now 91.0 liters) to compensate for the hike in power.
The Corvette C7.Rs, like their brethren in IMSA’s Prototype class, will have more air to feed their V8 engines thanks to new air restrictors (+0.9mm, now 31.5mm total) and have one more liter of fuel (now 92.0 liters) to burn.
IMSA’s GT Daytona class also has two positive additions to the BoP changes, starting with Audi’s R8 LMS GT3. The V10-powered cars in the field, currently next-to-last in the Manufacturers’ standings, will make use of slightly more airflow to their engines (+1.0mm, now 40.0mm total), and have received two more liters of fuel (now 96.0 liters).
Porsche’s 911 GT3R, last in the standings and winless like its sister brand Audi (along with Ferrari and Mercedes-AMG in GTD this season), has the healthiest bump in power (+3.0mm, now 43.0mm total) to turn its fortunes around, and one new liter of fuel (now 92.0 liters).
Practice for the Mobil 1 Sports Car Grand Prix at CTMP starts Friday at 11:30 a.m. ET.