Modified - SK
Explore official-source information about the Modified - SK in iRacing.
Image © iRacing.com Motorsport Simulations
Quick reference
- Power (iRacing)
- 309 kW415 hp
- Weight (iRacing)
- 1,179 kg2,600 lb
- Current engine
- 604 crate engine
The SK Modified combines the classic roofed, open-wheel pavement layout with the 604 crate engine introduced in iRacing's June 2026 overhaul.
Tyres and operating conditions
The June 2026 update introduced redesigned bias-ply tyres with different left- and right-side compounds. Grip is lower when cold and develops as the tyres warm up.
Suspension and chassis
The SK now has its own suspension geometry and inspection limits: setups no longer transfer to the Tour Modified. The rear track-bar settings show actual mount heights above the ground. Spring ranges depend on track type. Rebound adjustment uses 20 clicks; compression is fixed at the equivalent of the Tour car's setting 10.
Engine and electronic systems
The 604 crate engine introduced in June 2026 replaces the former SK power unit and brings a new torque curve. SK and Tour remain separate specifications, not interchangeable setup platforms.
Official sources
Stop Guessing, Start Improving
Many drivers slam the brakes with all their strength, but the fastest modulate pressure, use the brake to rotate the car, and exit as fast as possible. Train that skill here.
Train Anywhere, Anytime
Browser-based training works with any racing pedals or controllers. Fanatec, Thrustmaster, Logitech, Simucube — no installation required.
Pro-Designed Exercises
Access exercises created by professional sim racers like Suellio Almeida. Learn the exact braking patterns used by the fastest drivers.
Import Modified - SK Telemetry
Drop your Garage61 lap CSV and extract braking data for every corner. Generate personalized practice exercises based on YOUR telemetry, not generic patterns.
Track Your Progress
View session history, performance trends, and best scores. Watch yourself improve over time and stay motivated to practice.
And There's Much More
Improve your braking technique with this car and much more:
Create Custom Exercises
Build from templates, draw brake curves, or record with your pedal
Schedule Your Training
Plan practice sessions and track your consistency across weeks
Brake Master Ratings
Earn rankings and compete on leaderboards as you improve
Exercises & Progress Tracking
Practice exercises and track your progress completely free.
No install needed • Works in browser
General practice tips
Tip 1
Starting point
Start with the official setup and consult the simulator documentation for available controls. Appropriate brake bias depends on the car and conditions.
Tip 2
One variable
Change one setting at a time and compare several laps. Record the change and observed behavior before keeping it.
Tip 3
Comparable conditions
Compare similar fuel loads, tires and track conditions. One lap alone does not establish that a setting is better.
Frequently asked questions
General guidance for practicing and consulting car-specific sources.