Full honesty before we start: I never raced an LMP2 in real life. My career went karting, F3, F2, then GT machinery — the prototype seat never came. But downforce is downforce, carbon brakes are carbon brakes, and after a lot of laps in iRacing's Dallara P217 I'm convinced it's the smartest $12.95 a sports car driver can spend on the service.

In my IMSA series guide I called the P217 the best classroom in the series. This is the full lesson plan: what the car actually is in 2026, every series it races in, and how to drive the thing properly.

What the Dallara P217 actually is

The P217 is Dallara's 2017-generation LMP2 car — the chassis that raced at Le Mans, in the FIA WEC and in the European Le Mans Series, with a DPi cousin that carried Cadillac branding at the front of IMSA until the GTP era took over in 2023. Rubens Barrichello raced one at its Le Mans debut. It's a proper piece of equipment, not a fantasy spec car.

iRacing added it with the 2020 Season 4 build, and it's been the sim's one and only LMP2 ever since. One car, one spec, entire class — which is exactly why the racing in it is so clean.

The current numbers, straight from iRacing's own updated car manual:

  • Engine: Gibson GK-428 4.2-litre naturally aspirated V8, 540 bhp, 482 Nm
  • Rev limit: 8,500 rpm — capped at 8,000 in gears 1–5
  • Gearbox: Xtrac 6-speed sequential, paddle shift, no clutch needed
  • Weight: 950 kg dry, 1,081 kg wet with driver
  • Chassis: carbon monocoque, pushrod suspension, Brembo carbon discs
  • Price: $12.95 — AI-enabled, rain-capable, headlights for night racing

If you've seen "600 hp and 930 kg" quoted elsewhere, that's the old spec. Most sites never updated. Here's why those numbers changed.

The revamp that reset everything

In the 2025 Season 1 build (December 2024), iRacing gave the P217 a full-scale systems revamp to match the modern IMSA LMP2 rule set. New dry and wet tyre models. Tyre warmers cut to 35°C. Aerodynamics and ride-height measurement points re-evaluated, which changed the car's ride-height sensitivity significantly. Minimum weight up to 950 kg, rev limits down to the 8,000/8,500 arrangement, and the low-downforce aero package now exists only at Le Mans — where it's forced on you, dive planes locked to zero.

Then the Season 3 2026 build added series-specific sporting regulations for the car. The interesting one is WSC2017: a hosted-racing rule set that winds the engine back up to 600 hp with an 8,700 rpm limiter and a short gear stack, for period-accurate 2017-spec racing. In official series you race the modern detuned car; in a hosted session you can time-travel.

The practical consequence: any P217 setup or braking reference from before December 2024 is history. Treat old files as loose baselines — same honesty I gave you about my own archive in the iRacing setup archive — and expect the car you meet today to brake, ride kerbs and warm its tyres differently than any old YouTube guide suggests.

Where it races in 2026

This is where the P217 earns its money. One purchase currently covers six official series:

  • LMP2 Challenge – Fixed: the one-make home room. C 4.0 licence, 20-minute sprints, a race every two hours, twelve weeks. This season opened on the Watkins Glen Boot in June and finishes at Le Mans itself in the week of September 1. Short, cheap to enter, brilliantly matched racing.
  • IMSA iRacing Series (open setup, 45 minutes) and IMSA – Fixed (35 minutes): the flagship multiclass, B licence, where the P217 is the middle class between GTP and GT3. My IMSA series guide covers the whole format.
  • IMSA Endurance Series and Global Endurance Tour: the longer-format C-licence championships, running six-week schedules this season for drivers who want proper stint racing.
  • Plus this season's 6 Hours of the Glen special event on the calendar.

Over 125,000 drivers raced the car last season. That's not a dead class you'll be queueing alone for — it's one of the healthiest sports car ecosystems in the sim.

If you're choosing between fixed and open, my advice from the fixed vs open explainer applies double here: the fixed LMP2 grids teach you the car; open is where setup work starts paying rent.

How to drive it fast

Everything below transfers from real downforce racing, and the P217 rewards all of it.

Braking is a release skill, not a pressure skill

No ABS in this car — the dash gives you lockup warning lights, not a safety net. Carbon discs plus serious aero mean you brake violently hard at high speed, then bleed pressure away as the downforce disappears. If you lock a front at 120 km/h into a slow corner, the mistake happened in your release, not your initial hit. This is exactly what I drilled for years in F3 and F2, and it's the single biggest lap-time separator in this class.

Respect the 35-degree tyre warmers

Since the revamp, the car leaves pit lane on tyres warmed to just 35°C — genuinely cold by racing standards. The first sector of every out-lap is where P217 races end early. Build temperature through braking load and throttle, not silly weaving, and give the first two corners real margin. My notes on heating tyres in iRacing and tyre pressure both apply directly.

Use the traction control like an engineer, not a passenger

The P217 runs adjustable TC — separate gain and slip settings, changeable from the F8 black box while driving. My approach: set it low enough that you feel the rear move before the system catches it, then tune per track. If the TC lights are flickering on every exit, you're leaning on the electronics and burning drive. There's also a throttle-shape setting worth experimenting with in slow corners, and power steering assist you can only change in the pits — set it before qualifying, not after.

Learn both sides of the mirror

In the IMSA series the P217 lives in traffic: you're catching GT3s constantly while GTPs hunt you down. Pass GT3s where you have the downforce advantage — never lunge into their braking zone — and when a GTP arrives, hold your line and let them do the work. The discipline you build here is the reason I keep calling this car a classroom; it's also the cheapest way to get ready for the GTP class later.

Plan downshifts early

The gearbox has downshift protection: ask for a gear that would over-rev the Gibson and the car simply ignores you. Drivers coming from GT3 get caught mid-corner waiting for a gear that never arrived. Start your downshifts earlier and space them out — the engine braking is part of your car control anyway.

Setup: where to start

I won't invent numbers for you, but iRacing's own manual gives real targets worth knowing. Downforce choice follows top speed: under 270 km/h go high downforce, 270–290 medium, over 290 low. The car is extremely sensitive to ride height — the front works hardest around 5 mm of dynamic clearance — which is why the heave and third springs matter more than corner springs for platform control.

And if your setup fails tech after the revamp, it's almost certainly ride height: torsion bar turns at the front, spring perch offset at the rear, exactly the failure mode I broke down in my tech inspection guide. The fixed series run iRacing's own 'fixed' setup, so there's zero garage work needed to start racing tonight — and when you do go open, here's where setup files go.

FAQ

Is the Dallara P217 good for beginners in iRacing?

Not as your very first car — get your basics in the free content and work up, as I lay out in my iRacing beginner guide. But as a first prototype it's ideal: no hybrid systems, a forgiving spec class at C licence, and racecraft lessons every single stint.

What licence do you need to race LMP2 in iRacing?

C 4.0 for the LMP2 Challenge – Fixed, the one-make series. The multiclass IMSA iRacing Series needs a B licence in both its open and fixed versions.

Does the iRacing P217 have ABS or traction control?

Traction control yes — adjustable gain and slip from the cockpit. ABS no; you get wheel-lockup warning lights on the dash and nothing else. There's also adjustable power steering, changeable only in the pits.

How much does the Dallara P217 cost?

$12.95, and it currently unlocks six official series, AI racing included. On a cost-per-series basis it's among the best purchases on the service — my iRacing cost breakdown shows how car money actually adds up.

Should I buy the P217 or a GTP car first?

P217. Same tracks, same multiclass education, a fraction of the cockpit workload — and everything you learn transfers straight up when you're ready for the hybrid monsters. Single-seater drivers should look at the Dallara F3 first instead; tin-top drivers, start with GT3.

I've spent my whole career in cars that punish sloppy braking and reward clean commitment. The P217 is that education for $12.95 — buy it, run the fixed season, and be on the grid when it finishes at Le Mans.