iRacing Sportscar Series
Sessions

Ferrari's latest foray into GT3 racing, the 296 GT3 made its debut in the IMSA WeatherTech SportsCar Championship and other major global championships in time for the 2023 season. It succeeds the 488 GT3 EVO that made its debut in 2020, and it was designed to build on that car's successes with easier setup modifications for the crew and significantly more downforce than its predecessor.

Powered by a V6 engine just like its road-going counterpart, the 296 GT3 is capable of producing 600 horsepower from its 2.9-liter powerplant. Four cars took to the track across IMSA's GTD and GTD Pro classes in its debut at the 24 Hours of Daytona, and the car took its first win in a twice-around-the-clock endurance race a few short months later at the Nürburgring.

ENGINE TYPE:
F163CE, 120° V6, 4 valves per cylinder, 2992 cm3, GDI Turbo

WEIGHT:
524hp BORE/STROKE:
88 x 82 mm

MAX POWER:
around 600 Hp at 7250 rpm

MAX TORQUE:
around 712 Nm at 5500 rpm

GREABOX:
Transversal sequential gearbox, 6 speed e-clutch actuator with paddle on the steering wheel magnesium gearbox case with integrated oil catch tank

TRACKS:
1726 mm front / 1710 mm rear

WIDTH:
2050 mm max (without mirrors)

WHEELBASE:
2660 mm

WEIGHT (NO FUEL, NO DRIVER):
1350 kg (2976 lb)

FRONT AND REAR SUSPENSION:
Double wishbone, tubular steel suspension arms, aluminum uprights. 5 ways adjustable dampers

RIMS:
Front 12,5" x 18", Rear 13" x 18"

TYRES:
Front 30/68/18, Rear 31/71/18
BRAKE DISCS: Front Ø 400x36, Rear 332x32

BRAKE CALIPERS:
Front 6 pistons, Rear 4 pistons

BRAKE PADS:
Front 30 mm, Rear 26.5 mm

A mainstay of GT3 events around the world for much of the past decade, Audi's R8 LMS received its second upgrade for the 2022 racing season with the introduction of the R8 LMS Evo II. Like its predecessor, the Evo I, the Evo II can either be bought new or as an upgrade kit for a previous generation model. Major improvements to the car included a new aerodynamics package that generated more downforce with the rear wing, a new engine intake system, and four-way adjustable dampers in the suspension.

The R8 LMS Evo II showed its pace quickly in its first season, continuing a long line of successes for R8 LMS GT3 entries around the world. Highlights included three of the four fastest laps in qualifying for the Bathurst 12 Hour and continuing the brand’s long record of success in DTM by earning the 2022 manufacturer’s title with three race wins. The car remained ubiquitous toward the front of the pack in both sprint and endurance GT3 series around the world for the 2023 season.

Engine:
Normally aspirated V10 gasoline engine

Cubic capacity:
5200 cc

Power:
Up to 430 kW (585 hp)*

Torque:
Over 550 Nm

Type of drive:
Rear-wheel drive

Transmission:
Sequential, pneumatically operated six-speed performance transmission with paddle shifters

Dimensions:
4,599 / 1,997 / 1,171
Length / Width / Height (mm)

Weight:
1,235 kg (2723 lbs)

Fuel cell capacity:
120 l (32 gal)

Dallara’s return to prototype racing for the first time since the original Audi R18 TDI, the P217 made its debut in 2017. The car competes in the LMP2 class in both the FIA World Endurance Championship and European Le Mans Series, while a Daytona Prototype International-spec version of the car raced at the top level of the IMSA WeatherTech SportsCar Championship with Cadillac branding until the GTP spec was adopted for 2023.

The LMP2 P217 is powered by a 4.2-liter Gibson V8, and features a six-speed sequential paddle shift transmission by Xtrac. Drivers who raced in the car in its 24 Hours of Le Mans debut included Formula 1 legend Rubens Barrichello, former Le Mans winner Jan Lammers, and IndyCar veteran Mikhail Aleshin. Other Formula 1 veterans who have driven the car at Le Mans include Felipe Nasr, Sergey Sirotkin, and Giedo van der Garde. Chassis:
Carbon-fibre monocoque with aluminium honeycomb and Zylon side panels

Suspension:
Double Wishbone Independent Pushrod

Length:
4745mm

Width:
1900mm

Wheelbase:
3010mm

Engine:
Gibson GK-428 4.2 litre V8

Horsepower:
600 BHP Transmission:
Xtrac P1159F 6-speed sequential semi-automatic paddle-shift

Weight:
930kg

Brakes:
Brembo Carbon Disks

Built to the IMSA WeatherTech SportsCar Championship's new GTP regulations, the Acura ARX-06 debuted at the 2023 24 Hours of Daytona as a replacement for the ARX-05 that had run for five years under the previous DPi rule set. Acura continued its previous relationship with constructor Oreca to build the new car, which would debut in the hands of Meyer Shank Racing with Curb-Agajanian and Wayne Taylor Racing with Andretti Autosport; the teams would come roaring out of the gate by finishing 1-2 at Daytona.

The ARX-06 features a 2.4-liter, twin-turbocharged V6 engine, smaller than its predecessor but packing a powerful punch at over 670 horsepower. As with other GTP cars, the car weighs 1,030 kg and features a spec 50kW hybrid system.

Chassis:
Carbon fiber monocoque chassis manufactured by ORECA

Bodywork:
Acura-specific bodywork, aerodynamics and cooling systems

Suspension:
Double wishbone, pushrod suspension front and rear, Penske dampers

Safety:
FIA-specified roll cage structure, carbon fiber driver's seat shell, six-point safety harness, fresh air intake system, on-board fire suppression system

Engine:
Bespoke Acura 2.4-liter, twin-turbocharged, direct injected V6 internal combustion engine designed, developed and manufactured by HPD, mated to IMSA-specified electric Bosch Motor Generator Unit (MGU) and Williams Advanced Engineering battery pack

HP:
667 hp

Weight:
2447 lbs. Transmission:
IMSA-specified XTrac six-speed, sequential, paddle-operated transmission, rear-wheel drive

Dimensions:
5100mm length x 2000mm width x 1060mm height (above reference plane); 3148mm wheelbase

Revealed at BMW Sim Live in December 2020, the BMW M4 GT3’s reveal was a bridge between the virtual world and the real one—especially as its steering wheel could be removed from the real car and plugged directly into iRacing. The car received a pre-release on iRacing to give sim racers a taste of what to expect before it began competing in GT3 series around the world, and received updates in-sim to match its final form.

The BMW M4 GT3 succeeded the BMW Z4 GT3 as the second BMW to join iRacing’s GT3 offerings. It’s powered by a 3-liter twin turbo straight-six engine capable of producing 590 horsepower. Marked by traditional BMW styling cues, the M4 GT3 is as instantly recognizable as any of its predecessors both on track and off. Overall length:
197.4"

Overall width:
79.6"

Height:
37.4"

Wheelbase:
114.8"

Front track:
61.1"

Rear track:
62.2"

Dry weight:
2833 lbs.

Front tires:
325/680-18

Rear tires:
325/705-18

Brakes:
Brembo racing calipers (6 piston front, 4 piston rear), full floating Brembo rotors

Suspension:
Front and rear double A-arms with coilovers; KW 4-way adjustable dampers; blade-adjustable front and rear anti-roll bars

Drive-line:
6-speed sequential transaxle gearbox with pneumatic actuation

Engine Configuration:
Water-cooled inline 6

Location:
Front, longitudinally mounted

Construction:
Aluminum alloy block and heads

Displacement:
182.617

Valvetrain:
4 valves / cylinder, DOHC

Fuel feed:
Direct fuel injection

Lubrication:
Dry sump

Aspiration:
Turbocharged

Decades of racing heritage come together in the Lamborghini Huracán GT3 EVO, Lamborghini's latest GT3 challenger in sports car racing series from around the world. Developed in house in Sant’Agata Bolognese by Lamborghini Squadra Corse, the Huracán GT3 EVO builds on the winning formula of its predecessor, the Huracán GT3, with improved aerodynamics developed in conjunction with Dallara and a powerful 5.2-liter V10 engine.

2020 was a banner year for the car, with a clean sweep of the IMSA WeatherTech SportsCar Championship's driver and team titles in both its full-season and endurance race standings for Paul Miller Racing. Across the Atlantic, Barwell Motorsport ran the car to Lamborghini’s first British GT title, while a class victory in the 24 Hours of Spa and multiple GT World Challenge victories rounded out a stellar season. Dry Weight:
1285 kg

Wet Weight (50% Fuel) with Driver:
1411 kg

Displacement:
5.2 L

Power:
500 hp

Torque:
400 lb-ft

Rev Limit:
8500 rpm

Length:
4550 mm

Width:
2050 mm

Wheelbase:
2645 mm

Front Track Width:
1710 mm

Rear Track Width:
1660 mm

After a five-year hiatus from top-level prototype racing, Porsche returned to the discipline in 2023 with the all-new 963 for the IMSA WeatherTech SportsCar Championship's GTP class. Partnering with Multimatic to construct the chassis, the 963 made its racing debut at the 2023 24 Hours of Daytona with Porsche Penske Motorsport, and more teams have begun to adopt the car around the world as the season has continued. Penske's Mathieu Jaminet and Nick Tandy gave the car its first win at Long Beach in its third start of the IMSA season.

Powered by Porsche's 4.6 liter, twin-turbocharged V8, the 9RD engine that powers the 963 makes over 670 horsepower. As with other GTP cars, the car weighs 1,030 kg and features a spec 50kW hybrid system.

Engine:
Double supercharged, twin-turbo 4.6L V8 combustion engine, 4 valves / cylinder, DOHC, Direct Fuel Injection

Location:
Mid, longitudinally mounted

Weight:
1120 kg (2469 lb)

Chassis:
carbon-fibre and aluminium honeycomb monocoque

Gearbox:
XTrac. Single specification hybrid system, 7-speed racing transmission, pneumatically actuated

Combined Power:
670 bhp / 500 kW @ 10,000 rpm

The Cadillac V-Series.R is General Motors' latest top-level prototype entry for global sports car competition. Built to the universal Le Mans Daytona h regulations that made their debut for the 2023 season, the V-Series.R was launched in both the IMSA WeatherTech SportsCar Championship with entries from Chip Ganassi Racing and Action Express Racing, and internationally with another Ganassi-run team.

The Cadillac V-Series.R succeeds the Cadillac DPi-V.R, which scored five consecutive 24 Hours of Daytona wins from 2017 to 2021. Powered by a 5.5-liter V8, the V-Series.R has the largest engine of any cars to compete in the GTP class. It was able to score its first IMSA win in the 2023 12 Hours of Sebring with Alexander Sims, Pipo Derani, and Jack Aitken behind the wheel, recovering from an early incident and surviving a race of attrition in IMSA's hotly contested GTP class.

Engine Type:
5.5 Liters DOHC V8

Induction:
Naturally Aspirated

Power:
Series Specified up to 670 HP

Gearbox:
7-Speed Sequential

Lubrication:
Dry Sump

Weight:
1080 KG (2380 pounds)

Electric Motor:
Rear-mounted 50KW spec MGU supplied by Bosch

Transmission:
Xtrac P1359, 7-speed carbon-fibre plastics reinforced pneumatically actuated

Tires:
Michelin

BMW's long-awaited return to the highest ranks of prototype racing comes in 2023, as the German manufacturer teams up with chassis partner Dallara and team partner Rahal Letterman Lanigan Racing to bring the BMW M Hybrid V8 to the IMSA WeatherTech SportsCar Championship. Built to a new set of global prototype regulations, two M Hybrid V8s will compete in IMSA's premier GTP class, but countless more reproductions of the car are set to debut on iRacing before its first racing lap.

Years of coordinated efforts in both North America and Europe to create a unified top-level rule set have allowed top-tier manufacturers to return to the prototype ranks, with BMW becoming one of the first to announce its involvement. The M Hybrid V8 produces approximately 640 horsepower out of its four-liter powerplant alone, with its electric motor able to add even more boost.

Engine:
V-shaped Otto four-stroke twin-turbo engine

Capacity:
3,999 ccm

No. cylinders:
8

Cylinder construction:
Cast aluminium cylinder block and cylinder head, cylinder lining as iron layer in LDS procedure

V angle:
90°

Bore:
93 mm

Stroke:
73.6 mm

Cylinder spacing:
102 mm

Valves per cylinder:
4

Engine speed:
max. 8,200 rpm

Output (regulated):
approx. 665 hp

Torque:
approx. 650 Nm

Injection:
High-pressure direct injection at 350 bar

Oil system:
Dry sump system with six-cell oil drain pump and oil tank

Length:
5100 mm

Wheelbase:
3150 mm

The latest in a long line of Porsche 911s built for sports car racing, the 992-spec edition of the Porsche 911 GT3 R follows in the footsteps of the 991-based GT3 R that debuted for the 2019 racing season. It also joins the current model of the Porsche 911 GT3 Cup car, which debuted in 2021, as a racing Porsche based on the 992 generation. In its inaugural IMSA WeatherTech SportsCar Championship season, five teams-Pfaff Motorsports, MDK Motorsports, Wright Motorsports, AO Racing Team, and Kelly-Moss with Riley-have all brought at least one 992 to the grid across the GTD and GTD Pro divisions.

The 911 GT3 R (992) is powered by a 4.2-liter Porsche flat-six engine, a step up in displacement from the 4.0-liter units in the previous car. Its first IMSA win came at the hands of Pfaff's GTD Pro squad of Klaus Bachler, Patrick Pilet, and Laurens Vanthoor in the 2023 12 Hours of Sebring, and the duo of Bachler and Pilet backed it up the next month with a third place finish on the streets of Long Beach. Kelly-Moss with Riley took the car's first GTD podium at Sebring as well with Alec Udell, Julien Andlauer, and David Brule.

Engine:
Water-cooled six-cylinder boxer engine (rear mounted) based on 992 engine generation
Single mass flywheel
Four-valve technology
Direct fuel injection
Dry sump lubrication with oil/water heat exchanger
Engine control unit (ECU) BOSCH MS 6.6
Race exhaust system with twin tailpipes mounted centrally
Carbon fiber intake manifold and 6 throttle butterflies
Catalytic converter
Porsche Motorsport Traction Control

Displacement:
4,194 cm3

Power:
416 kW/565 HP subject to FIA BoP classification

Transmission:
Six-speed constant-mesh gearbox
Internal pressurized oil lubrication with heat exchanger
Mechanical limited slip differential with adjustable preload mechanism
Motorsport carbon clutch
Electrohydraulic clutch actuator
Paddle shift with electronic shift barrel actuator
Integration of AC compressor and alternator mounted in front of gearbox

Front axle:
Double wishbone front suspension with hydraulicly power assisted steering

Rear axle:
Improved multilink independent rear suspension
High-performance spherical bearings
Wheel hubs with center lock wheel nuts
Motorsport dampers; 5-way adjustable including blow-off
Damper potentiometers
Adjustable anti-roll bar blades (left & right)
Shim adjustment system

Brakes:
Two separate brake-circuits for front and rear axles
Six-piston (front)
Four-piston (rear axle) aluminium-monobloc racing brake calipers
Ventilated and grooved steel brake disc
Motorsport brake pads
Optimized brake cooling ducts
Brake temperature sensors
Improved BOSCH Race ABS Generation 5

Total weight:
Approx. 1250 kg (subject to BoP)

Overall length:
4,619 mm (without aerodynamic devices)

Overall width front axle:
2,039 mm

Overall width rear axle:
2,050 mm

Wheelbase:
2,507 mm

Wheels/Tires:
One piece BBS alloy wheels, according to Porsche specification and design, 12.5 J x 18 (front); 13.0 J x 18 (rear)
Michelin transport tires; tire dimensions: 30/68-18 (front); 31/71-18 (rear)

Since its introduction in 2015, the Mercedes-AMG GT3 has been one of sports car racing's most prominent challengers. The car took home five of the top six spots, including the top four, in the Nurburgring 24 Hours on its first try, and found success with Riley Technologies in the premier IMSA WeatherTech SportsCar Championship events at Daytona and Sebring shortly after.

For the 2020 season, the car received a slate of updates that included aerodynamic tweaks to the front splitter and rear wing and aesthetic updates to bring it closer in line with its roadbearing counterpart. Carrying over from its first iteration is the 6.3-liter V8 powerplant that produces 550 horsepower and sequential six-speed transmission. Now, the fully updated Mercedes-AMG GT3 comes to iRacing, and it's your chance to sample the next generation of German road racing performance. Engine:
AMG 6.3-litre V8 naturally aspirated engine (6,208 cm³)

Transmission:
Sequential AMG 6-gear racing transmission

Electronics:
Motorsports electronics incl. multiple-adjustable ABS and AMG TRACTION CONTROL

Wheels/Tires:
AMG alloy wheels, 18", forged [FA 325 /680-18 / RA 325 /705-18]

Brakes:
[FA 390 mm/RA 355 mm] Brake balance configuration via beam

Chassis:
Double wishbone FA/RA Configurable motorsports rebound and pressure dampers, configurable stabilisers

Weight:
1285 kg [2832.94 lb]

Fuel Tank:
120 litres, motorsports safety tank

Length:
4746 mm [186.85 inches]

Width:
2049 mm [80.67 inches]

Height:
1238 mm [48.74 inches]