Here is a concise summary of the Porsche 919 Evo:
**Project Overview**
* Porsche created the 919 Evo by modifying their Le Mans-winning LMP1 car, ignoring traditional racing rules for a one-off, high-performance vehicle.
* Goal: Achieve the fastest lap times possible, specifically targeting the Nürburgring and Spa tracks.
**Key Upgrades**
1. **Engine**: Removed fuel flow restrictor, increasing power from 500 to 720 horsepower (plus an additional 440 horsepower from the electric motor).
2. **Aerodynamics**: Active aero system with adjustable front diffuser and rear wing, increasing downforce by 53%.
3. **Weight Reduction**: Removed non-essential components, resulting in an 86 kg weight loss.
4. **Custom Tires**: Softer compound designed by Michelin for maximum grip.
5. **Advanced Braking**: Torque vectoring braking system using onboard computer systems.
**Achievements**
* Set a new Nürburgring lap record (5:19 minutes), beating the previous record held by the Porsche 956C.
* At Spa, achieved a lap time of 1:41.7 minutes, outpacing Lewis Hamilton's F1 pole time by over 7 tenths of a second.
**Future Challenges**
* Potential contenders for the 919 Evo's lap records: highly modified F1 cars or advanced electric prototypes, such as VW's ID.R Pikes Peak.
Here are the key facts extracted from the text, numbered and in short sentences:
**Porsche 919 and 919 Evo**
1. The Porsche 919 Evo is a modified version of the Le Mans-winning Porsche 919 prototype.
2. The Porsche 919 won 17 of 33 races in the World Endurance Championships LMP1 category.
3. The 919 won three consecutive championships from 2015 to 2017.
4. After retiring the 919, Porsche created the 919 Evo as a final project.
**Performance Enhancements**
5. Removing the fuel flow restrictor added 220 horsepower to the 2L V4 engine.
6. The engine's power output increased from 500 to 720 brake horsepower.
7. The electric motor's power output was increased from 400 to 440 horsepower.
8. The 919 Evo's powertrain produces 1,160 horsepower in total.
**Technical Specifications**
9. The hybrid system is similar to that of an F1 car, recharging under braking and deploying energy under acceleration.
10. The car also regenerates energy from exhaust gases using an MGUH.
11. The 919 Evo is four-wheel drive, unlike F1 cars which are two-wheel drive.
**Aerodynamics and Downforce**
12. An active aero system was added, allowing dynamic adjustments to the front diffuser and rear wing.
13. Skirts were added to trap airflow and maximize downforce.
14. The 919 Evo produces 53% more downforce than the standard 919.
15. Porsche claims the Evo produces more downforce than a Formula One car.
**Weight and Tire**
16. The 919 Evo is 86 kilograms lighter than the standard car.
17. The power-to-weight ratio is 1,350 brake horsepower per ton.
18. Custom, softer-compound tires were created by Michelin for the Evo.
**Lap Records**
19. The 919 Evo broke the Nurburgring lap record, previously held by the Porsche 956C (since 1983).
20. The 919 Evo lapped the Nurburgring in 5 minutes and 19 seconds.
21. At Spa, the 919 Evo beat Lewis Hamilton's pole time (1:42.5) by over 7 tenths of a second.
**Driver and Conditions**
22. Neil Jani set the lap records in the 919 Evo.
23. Laps at the Nurburgring were attempted at early morning hours to keep tire temperatures optimal.