It's Fast Friday at Indianapolis Motor Speedway. Speeds among the 34 drivers seeking a spot in the 2024 Indianapolis 500 will jump today as race officials give them a 100-horsepower boost for this weekend's qualifying.

Pato O'Ward and Scott McLaughlin have had the fastest laps in this week's practice, which has been frequently interrupted by rain. Marcus Ericsson and Linus Lundqvist have sustained accidents. NASCAR star Kyle Larson continues his effort to race 1,100 miles in one day.

Nathan Brown is your best Indy 500 follow, and we will have updates throughout practice. Please remember to refresh.

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6 p.m.: Team Penske dominates Indy 500 Fast Friday practice

Team Penske rules Fast Friday.

Defending Indy 500 champion Josef Newgarden, Scott McLaughlin and 2018 race champ Will Power – all from Roger Penske's team – have the best 4-lap qualifying simulation runs in Fast Friday practice.

Newgarden goes 234.063 mph over a 10-mile run on the 2.5-mile Indianapolis Motor Speedway oval. McLaughlin, Power and Arrow McLaren's Alexander Rossi and Pato O'Ward all top 233.

Katherine Legge has the lowest 4-lap run among those reaching qualifying speed (229.984). Rookie Nolan Siegel, who crashed on Friday, did not reach a 200 mph average over a 4-lap run.

Colton Herta had the best single lap (234.974) and Kyle Larson was No. 2 (234.271).

Qualifying for the May 26 race begins Saturday, when race positions 13-30 will be settled. The front 4 rows and the back row will be determined Sunday. One of the 34 entries will not make the race.

Indy 500 Fast Friday practice recap 

With car number, driver, engine, team, mph over a 4-lap simulated qualifying run

1. (2) Josef Newgarden, Chevrolet, Penske, 234.063

2. (3) Scott McLaughlin, Chevrolet, Penske, 233.623

3. (12) Will Power, Chevrolet, Penske, 233.451

4. (7) Alexander Rossi, Chevrolet, Arrow McLaren, 233.355

5. (5) Pato O'Ward, Chevrolet, Arrow McLaren, 233.043

6. (60) Felix Rosenqvist, Honda, Meyer Shank, 232.906

7. (27) Kyle Kirkwood, Honda, Andretti Global, 232.893

8. (78) Agustin Canapino, Chevrolet, Juncos Hollinger Racing, 232.875

9. (14) Santino Ferrucci, Chevrolet, AJ Foyt Racing, 232.867

10. (17) Kyle Larson, Chevrolet, Arrow McLaren, 232.549

11. (26) Colton Herta, Honda, Andretti Global, 232.548

12. (21) Rinus VeeKay, Chevrolet, Ed Carpenter Racing, 232.517

13. (41) Sting Ray Robb, Chevrolet, AJ Foyt Racing, 232.207

14. (06) Helio Castroneves, Honda, Meyer Shank, 232.200

15. (98) Marco Andretti, Honda, Andretti Global, 232.083

16. (45) Christian Lundgaard, Honda, Rahal Letterman Lanigan, 232.025

17. (10) Alex Palou, Honda, Chip Ganassi Racing, 231.972

18. (23) Ryan Hunter-Reay, Chevrolet, Dreyer & Reinbold/Cusick, 231.658

19. (9) Scott Dixon, Honda, Chip Ganassi Racing, 231.546

20. (20) Ed Carpenter, Chevrolet, Ed Carpenter Racing, 231.546

21. (6) Callum Ilott, Chevrolet, Arrow McLaren, 231.430

22. (30) Pietro Fittipaldi, Honda, Rahal Letterman Lanigan, 231.319

23. (28) Marcus Ericsson, Honda, Andretti Global, 231.298

24. (11) Marcus Armstrong, Honda, Chip Ganassi Racing, 231.219

25. (8) Linus Lundqvist, Honda, Chip Ganassi Racing, 231.107

26. (33) Christian Rasmussen, Chevrolet, Ed Carpenter Racing, 231.070

27. (66) Tom Blomqvist, Honda, Meyer Shank, 230.945

28. (15) Graham Rahal, Honda, Rahal Letterman Lanigan, 230.867

29. (75) Takuma Sato, Honda, Rahal Letterman Lanigan, 230.833

30. (77) Romain Grosjean, Chevrolet, Juncos Hollinger Racing, 230.740

31. (24) Conor Daly, Chevrolet, Dreyer & Reinbold/Cusick, 230.490

32. (4) Kyffin Simpson, Honda, Chip Ganassi Racing, 230.340

33. (51) Katherine Legge, Honda, Dale Coyne Racing, 229.984

34. (18) Nolan Siegel, Honda, Dale Coyne Racing, 199.413

5:30 p.m.: Graham Rahal discusses Indy 500 qualifying

Graham Rahal had the 25th best 4-lap qualifying simulation run as he sat on pit road with about 35 minutes remaining in practice. He feels more confident than last year, when he failed to make the race in qualifying, but got in after a post-qualifying crash that injured Stefan Wilson.

"We're in a safer spot," Rahal said. "We've still got work to do."

5:15 p.m.: Kyle Larson says Fast Friday not 'scary fast'

The NASCAR Cup star drives 34 laps, with the 2nd-best single lap at 234.271 mph. His best 4-lap qualifying simulation run is 232.549, which is 9th heading into the closing 45 minutes of practice.

"I expected it to feel like we were going way faster than before. It definitely feels faster, but not scary fast," he said on pit road. "Pretty comfortable."

5 p.m.: It's Happy Hour at Fast Friday

Here's where we stand heading into the final hour of Indianapolis 500 practice.

With car number, driver, engine, team, mph over a 4-lap simulated qualifying run

1. (2) Josef Newgarden, Chevrolet, Penske, 234.063

2. (3) Scott McLaughlin, Chevrolet, Penske, 233.623

3. (12) Will Power, Chevrolet, Penske, 233.451

4. (7) Alexander Rossi, Chevrolet, Arrow McLaren, 233.355

5. (60) Felix Rosenqvist, Honda, Meyer Shank, 232.857

6. (14) Santino Ferrucci, Chevrolet, AJ Foyt Racing, 232.867

7. (27) Kyle Kirkwood, Honda, Andretti Global, 232.663

8. (5) Pato O'Ward, Chevrolet, Arrow McLaren, 232.565

9. (17) Kyle Larson, Chevrolet, Arrow McLaren, 232.549

10. (26) Colton Herta, Honda, Andretti Global, 232.548

∎ Pietro Fittipaldi suffers a mechanical issue and coasts into the pits.

∎ Colton Herta has the fastest single lap at 234.974 mph.

Track conditions: 75 degrees, cloudy, wind out of the southwest; track temperature 107 degrees and dropping.

4 p.m.: How IndyCar teams are faring on Fast Friday

Team Penske still has 3 of the top 4 4-lap qualifying simulation runs. Arrow McLaren (2nd, 6th, 7th, 16th), Andretti Global (8th, 10th, 12th) and Meyer Shank (5th, 11th, 21st) are also strong.

Kyle Larson, driving for Arrow McLaren, has the day's top single lap at 234.271 mph, but he doesn't complete a simulated qualifying run.

Pato O'Ward, an Arrow McLaren driver who stands 6th, said in Gasoline Alley he isn't considered with chasing the speed of the Penske cars for qualifying. He said any car starting in the top 15 is capable of winning.

Noticeably missing from the top of the speed chart: Chip Ganassi Racing (Scott Dixon is best at 13th); Rahal Letterman Lanigan (Graham Rahal is 22nd; he was initially bumped from the field last year as the team struggled mightily; Rahal ended up in the field on another team after a post-qualifying crash).

3:15 p.m.: Alex Palou suffers a mechanical issue

The IndyCar Series points leader who won on the IMS road course last weekend brings out a caution as his engine appears to encounter a problem on the back stretch. He started last year's race from the pole and finished 4th.

3 p.m.: Halfway through Fast Friday Indy 500 qualifying practice

Marcus Ericsson and Linus Lundqvist, who crashed Thursday, are back on the track.

1. (2) Josef Newgarden, Chevrolet, Penske, 234.063 mph; this 4-lap qualifying simulation run is just completed. Alex Palou's 2023 pole speed was 234.217.

2. (12) Will Power, Chevrolet, Penske, 233.172

3. (3) Scott McLaughlin, Chevrolet, Penske, 233.054

4. (7) Alexander Rossi, Chevrolet, Arrow McLaren, 232.916

5. (60) Felix Rosenqvist, Honda, Meyer Shank, 232.857

6. (5) Pato O'Ward, Chevrolet, Arrow McLaren, 232.565

7. (17) Kyle Larson, Chevrolet, Arrow McLaren, 232.549

8. (26) Colton Herta, Honda, Andretti Global, 232.548

9. (21) Rinus VeeKay, Chevrolet, Ed Carpenter Racing, 232.448

10. (06) Helio Castroneves, Honda, Meyer Shank, 231.743

Track conditions: 75 degree air temperature, cloudy skies; 111 degree track temp

Newgarden tries to temper his excitement after his fast run: "It'll be harder tomorrow and even harder on Sunday." He notes his poor qualifying draws (which will be done after Friday's practice) and potential changes in weather and track conditions during the weekend.

2 p.m.: Snake on the track?! Snake on the track

Alexander Rossi stands third in 4-lap qualifying simulation runs through 2 hours, despite an unusual encounter.

1:37 p.m.: Indy 500 rookie Nolan Siegel crashes

The 19-year-old spins in Turn 2, hits the outside wall and gets airborne before coming to rest on the back straight upside down. He immediately apologized to his crew on the team radio and said he was all right. Safety crew members tip the car right side up.

"Feel bad for the team," he said after being cleared to drive at the infield medical center.

1 p.m.: Penske drivers have best simulated 4-lap qualifying runs

This is from the first hour of practice. Drivers say their setups are conservative, so expect speeds to climb.

1. (2) Josef Newgarden, Chevrolet, Penske, 233.259 mph

2. (3) Scott McLaughlin, Chevrolet, Penske, 233.054

3. (12) Will Power, Chevrolet, Penske, 232.561

4. (21) Rinus VeeKay, Chevrolet, Ed Carpenter Racing, 232.448

5. (06) Helio Castroneves, Honda, Meyer Shank, 231.743

6. (98) Marco Andretti, Honda, Andretti Global, 231.734

7. (5) Pato O'Ward, Chevrolet, Arrow McLaren, 231.696

8. (17) Kyle Larson, Chevrolet, Arrow McLaren, 231.560

9. (6) Callum Ilott, Chevrolet, Arrow McLaren, 231.430

10. (14) Santino Ferrucci, Chevrolet, AJ Foyt Racing, 231.395

12:35 p.m.: Kyle Larson has a hot lap

Kyle Larson, who is trying to complete the Indy 500-NASCAR double this month, has a lap of 232.493 mph, 7th fastest in the first half-hour.

"He's a pro, but he's very much not used to it," said Tony Kanaan, the 2013 Indy 500 winner who is coaching Larson through his first Indy 500 experience.

12:02 p.m.: Josef Newgarden is fast out of the box

Last year's Indy 500 winner turns a lap at 233.868 mph just after the green flag flies.

"It felt OK," he said on pit lane a few minutes later, noting he doesn't expect to turn a lot of laps today. "Wasn't perfect. It's difficult to tell where everything's going to land (tomorrow)."

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Indy 500 qualifying schedule

All sessions will be on Peacock, IndyCar Live, IndyCar Radio and SiriusXM Channel 218; all times ET

May 18, Saturday

8:30-9:30 a.m.: Indy 500 full field practice

11 a.m.-6 p.m.: Indy 500 qualifying

May 19, Sunday

Noon-2 p.m.: Indy 500 practice

3-6 p.m.: Indy 500 qualifying, also on NBC

Monday, May 20

1-3 p.m.: Indy 500 full field practice

Friday, May 24

11 a.m.-1 p.m.: Carb Day, Indy 500 full field practice

2:30-4 p.m.: Pit stop competition

This article originally appeared on Indianapolis Star: Indianapolis 500 practice updates, speeds, crashes on Fast Friday