The iRacing Sebring 12 Hours is coming up, and you need a plan.
Whether this is your first endurance special event or you’re a veteran looking to sharpen your approach, this guide covers everything. The 2026 start times, car choices per class, race strategy, fuel and tyre management, and how to get your setups sorted before the green flag drops.
The Sebring 12 Hours is the second major endurance special event on iRacing’s calendar, following the Daytona 24 Hours. It features GTP, LMP2, and GT3 cars battling through 12 hours of multiclass racing at one of the most punishing circuits in sim racing.
Let’s get you ready.
2026 iRacing Sebring 12 Hours Start Times
The iRacing Sebring 12 Hours typically runs the week after the real-life race. In 2026, the event takes place between Friday, 27th March and Sunday, 29th March. As usual, there are four starting times to accommodate drivers in all time zones:
- Friday 22:00 GMT: Ideal for teams in Asia and Australia. The race runs through Saturday daytime in those regions, so no one has to do a 3 am stint.
- Saturday 07:00 GMT: Tends to have fewer participants, which makes it a good option for newcomers or teams with drivers spread across multiple time zones.
- Saturday 12:00 GMT: The “main” slot. Highest participation, and iRacing broadcasts the top split live. If you want the full experience, this is the one.
- Saturday 16:00 GMT: Best for teams in North and South America. The entire race fits comfortably within the day.
Tip: If your team has drivers in different time zones, pick the slot that avoids anyone doing more than one overnight stint. Driver fatigue leads to mistakes, and at Sebring, mistakes are expensive.
What You Need to Enter
Before you can register, make sure you’ve got the basics covered:
- Minimum licence: D-level road racing licence
- Team requirement: At least 2 drivers (you cannot enter solo)
- Registration: Register as a team through iRacing’s Special Events page
- Split allocation: iRacing assigns your split based on the team’s combined road iRating. Each split has 50 cars.
- Sports, Formula & Oval iRacing Setups
- Race Telemetry - Brake, Throttle & Racing Lines
- Corner by Corner AI Coaching To Gain Seconds
- Challenge Racers on the Delta Leaderboards
Sebring International Raceway – What Makes It So Tough
Sebring is one of the oldest continuously operating race tracks in the United States, and it feels like it. The circuit is 6.019 kilometres long and built on the runways of a former World War II airbase, which means the surface is a unique mix of concrete and asphalt.
That surface is what makes Sebring so distinctive, and so difficult. Here’s why:
The bumps are relentless. The concrete sections are rough, uneven, and constantly trying to unsettle the car. Braking zones feel unstable, and you’ll find the car moving around in ways it doesn’t at smoother circuits. Your setup needs to handle this without destroying the tyres.
Grip levels change across the surface. The transitions between concrete and asphalt create varying grip levels, sometimes mid-corner. This adds a layer of complexity that catches out drivers who’ve only practised on smoother tracks.
It’s a long, diverse layout. 17 corners, including tight hairpins, fast sweeping sections, and heavy braking zones. The most famous corners are the double-apex Turn 1, the Hairpin at Turn 7, and Sunset Bend at Turn 17. Each demands something different from the car and the driver.
Traffic is constant. With GTP, LMP2, and GT3 cars all on track together, you’re always managing traffic. The speed differences between classes are significant, and Sebring’s narrow sections make overtaking risky.
To study the track in detail, check out our GT3 iRacing Sebring lap guide on YouTube – the hot lap walks you through every corner.
The Cars
The Sebring 12 Hours is a multiclass event with three available classes: GTP (Acura, BMW, Porsche, Ferrari and Cadillac), LMP2 (Dallara) and GT3, with 10 cars on the grid now.
Unlike in the real-life race, there is no LMP3 class. Besides, you can choose only the GT3 cars used in the real IMSA Championship, so there is no vintage McLaren MP4-12C GT3 or Ford GT GT3.
iRacing adjusts the performance of different cars in the same class by utilizing its own Balance of Performance (BoP) rules, which are custom-made for this event. Note that the lap times in the table below were set in iRacing without the custom BoP applied.
GTP Class
| Car | Engine |
| Acura ARX-06 | Mid-engine 2.4-litre V6 Turbocharged |
| BMW M Hybrid V8 | Mid-engine 4.0-litre V8 Turbocharged |
| Cadillac V-Series R | Mid-engine 5.5-litre V8 Turbocharged |
| Ferrari 499p | Mid-engine 3.0-liter V6 Twin-turbocharged |
| Porsche 963 | Mid-engine 4.5-litre V8 Turbocharged |
LMP2 Class
| Car | Engine |
| Dallara P217 | Mid-engine 4.2-litre V8 Naturally aspirated |
GT3 class
| Car | Engine |
| Acura NSX GT3 Evo 22 | Mid-engine 3.5-liter V6 Twin-turbocharged |
| Audi R8 LMS GT3 Evo II | Mid-engine 5.2-litre V10 Naturally aspirated |
| BMW M4 GT3 | Front-engine 3.0-litre straight-six Turbocharged |
| Chevrolet Corvette Z06 GT3.R | Mid-engine 5.5-liter V8 Naturally aspirated |
| Ferrari 296 GT3 | Mid-engine 2.9-litre V6 Turbocharged |
| Ford Mustang GT3 | Front-engine 5.4-liter V8 Naturally aspirated |
| Lamborghini Huracan GT3 Evo | Mid-engine 5.2-litre V10 Naturally aspirated |
| McLaren 720s GT3 Evo | Mid-engine 4.0-liter V8 Twin-turbocharged |
| Mercedes-AMG GT3 2020 | Front-engine 6.3-litre V8 Naturally aspirated |
| Porsche 911 GT3 R (992) | Rear-engine 4.2-litre flat-six Naturally aspirated |
Best Car Choices for the iRacing Sebring 12 Hours
Car choice matters at Sebring more than at most tracks. The bumpy surface, mixed grip levels, and heavy braking zones reward certain characteristics.
GTP – Best Picks
The Ferrari 499P and Porsche 963 are the standout GTP choices at Sebring. Both handle the bumpy surface well and deliver strong pace across the full range of conditions you’ll face over 12 hours. The Acura ARX-06 sits at the bottom of the GTP field, though the margins are tight. The custom BoP for this event brings the class closer together than you might expect from weekly racing. If you’re most comfortable in a different GTP, don’t feel like you have to switch. The gap between best and worst is small enough that driver consistency will matter more than car choice.
LMP2
There’s only one option – the Dallara P217. The good news is it’s a brilliant car for Sebring. It’s lighter and more nimble than the GTPs, handles the bumps reasonably well, and the single-class field means you’re racing wheel-to-wheel with identical machinery. Pure driving and strategy win here.
GT3 – Best Picks
For GT3, the Ford Mustang GT3 and Mercedes-AMG GT3 are the cars to beat at Sebring. The Mustang’s front-engine layout provides excellent stability under braking – a huge advantage on Sebring’s bumpy braking zones – and it carries good speed through the faster sections. The Mercedes is similarly stable and predictable, which pays dividends over a 12-hour race where you need to trust the car, stint after stint.
At the other end, the Porsche 911 GT3 R (992) and Ferrari 296 GT3 are currently the weaker picks, though the field is close enough that a well-driven car with a strong strategy can still compete. If you’ve put hundreds of laps into the Porsche or Ferrari and know them inside out, that familiarity might still outweigh the small pace deficit over 12 hours.
Setups for the iRacing Sebring 12 Hours
Getting your setup right at Sebring is critical. The default setups are not designed for this circuit’s unique surface, and a car that hasn’t been tuned for the bumps will eat tyres and fight you in every braking zone.
Check out Coach Dave Academy’s iRacing setups with Delta – which includes setups prepared for the Sebring International Raceway, specificallyfor the GTP, LMP2, and GT3 cars.
Every setup comes with qualifying and race setups, telemetry data, reference laps, and the use of the AI Coaching tool to improve your lap times faster.
Gain seconds in lap time with our incredible iRacing setups that include professionally developed setups and referance laps for every car available in the official weekly racing series that you can find on iRacing.
Race Format and Rules
Here’s how the event runs on race day:
Qualifying: An 8-minute session with two flying laps to set your grid position. Only one team member can qualify, but the starting driver doesn’t have to be the same person who qualified.
Race start: Rolling start at 9:30 AM sim time.
Incidents: You receive a drive-through penalty after 50 incidents, then another for every 20 incidents after that. The 50-incident limit applies across all drivers on the team for the entire race. This means clean driving isn’t just nice to have, it’s essential.
No caution periods: Unlike the real IMSA Sebring 12 Hours, there are no full-course yellow flag periods. That means the field never bunches back up. If you build a gap, you keep it. If you lose time through a mistake or a slow pit stop, you have to earn it back on track.
Driver swaps: Teams must have at least 2 drivers. Plan your stints in advance so everyone knows when they’re driving and the swap process is smooth.
Race Strategy – Fuel, Tyres, and Pit Stops
Strategy is where races are won and lost at Sebring. A team with a slightly slower pace but better strategy can easily finish ahead of faster teams that make costly pit stop decisions.
Fuel Management
The goal is simple: minimise the total number of pit stops. Every pit stop costs roughly 30-45 seconds, depending on whether you’re taking fuel only or fuel and tyres.
Work out your fuel consumption per lap in practice for your specific car and driving style. Then calculate how many laps you can do per tank. If you can extend each stint by even one lap through fuel saving (lifting slightly before braking zones, short-shifting on exits), you might eliminate an entire pit stop over 12 hours. That can easily be a 30-second advantage.
Splash and dash warning: If your calculations show you’ll need a tiny splash of fuel for the final stint, it’s almost always better to save fuel throughout the race and avoid the extra stop entirely. A few tenths per lap in fuel saving is far cheaper than a full pit entry and exit.
Tyre Management
Sebring’s rough surface is tough on tyres, but degradation varies significantly between the hotter daytime stints and the cooler night portions of the race.
Practice in different conditions to learn when you can double-stint tyres (running two fuel loads on the same set). A fuel-only stop is significantly faster than a fuel-and-tyres stop, so every double-stint you pull off is time gained.
As a general rule, tyres last longer in cooler conditions, so you’re more likely to double-stint in the evening portions. Be cautious about double-stinting in hot conditions – the time lost from degraded tyres might outweigh the pit stop time saved.
Stint Planning for Your Team
For a 2-driver team, aim for stints of roughly 2-2.5 hours each. This keeps drivers fresh without adding too many driver swaps. For a 3-driver team, 1.5-2 hour stints work well and give everyone reasonable rest between stints.
Plan your driver swaps to coincide with tyre changes where possible. If you need tyres anyway, that’s the time to swap drivers – you’re not losing additional pit time.
Pit Stop Timing
Avoid pitting in clusters with other cars. Watch for traffic in the pit lane and time your stops to come in when the lane is relatively clear. A slow pit lane entry behind three other cars can cost you 5-10 seconds you’ll never get back.
- Sports, Formula & Oval iRacing Setups
- Race Telemetry - Brake, Throttle & Racing Lines
- Corner by Corner AI Coaching To Gain Seconds
- Challenge Racers on the Delta Leaderboards
Summary
The Sebring 12 Hours is one of the most challenging endurance events on the iRacing calendar. The bumpy surface, heavy multiclass traffic, and changing conditions across 12 hours make it a true test of preparation, strategy, and consistency.
Focus your preparation on three things: learning to manage the bumps and surface changes, getting your fuel and tyre strategy nailed down, and practising clean driving in traffic. Do those three things well and you’ll not only reach the chequered flag, but you’ll also have a genuine shot at a strong result.
If you need setups, coaching, or just want an edge in your preparation, Coach Dave Academy has iRacing setups, video guides, and one-on-one coaching tailored for this event. And if you haven’t tried Delta yet, the automatic setup installation and AI coaching alone will save you hours of preparation time.
Good luck out there. See you at Sebring.
Sebring 12 Hour Event FAQ:
You need a minimum D-level road racing licence to enter. If you’re close to the requirement, make sure to get your licence promotion sorted well before the event.
You need at least 2 drivers to register as a team. There’s no maximum team size, but most competitive teams run with 2-4 drivers.
There’s no single “best” car – it depends on your class and driving style. In GTP, the Ferrari 499P and Porsche 963 are the top performers. In GT3, the Ford Mustang GT3 and Mercedes-AMG GT3 lead the way, though the margins across the whole field are tight.
There are four start times: Friday 22:00 GMT, Saturday 07:00 GMT, Saturday 12:00 GMT (the main broadcast slot), and Saturday 16:00 GMT.
You get a drive-through penalty at 50 incidents, then every 20 incidents after that. The limit applies across all team drivers for the entire race. Clean driving is essential.
No. The minimum team size is 2 drivers. If you don’t have a co-driver, check the iRacing forums or community Discord servers — many teams are looking for additional drivers in the weeks before the event.
