Will Power set the fastest time in the second practice session ahead of this weekend's IndyCar season-opener in St Petersburg.
Power moved to the top of the timing screens early on with a 1m01.4467s lap, and his time - just 0.07 seconds slower than the lap that earned him pole position here last year - was never beaten.
Morning pacesetter Ryan Hunter-Reay came closest with a time 0.1785s slower than his rival's, while Simona de Silvestro's move to KV and Chevrolet power got off to an encouraging start with the third-best lap. The Swiss driver finished up 0.06s off Hunter-Reay's time, and said that she was pleased with her early progress.
"It's been pretty good," she said. "It's still Friday so we have a lot of work for tomorrow, but it's pretty cool to put a lap together and see the #78 up front."
Oriol Servia was fourth-fastest, just ahead of Takuma Sato, who was the best of the Honda-powered entries.
Helio Castroneves, Tony Kanaan and James Hinchcliffe were next, followed by Tristan Vautier. The rookie had a late coming-together with EJ Viso, although neither car appeared to suffer any damage. Marco Andretti completed the top 10.
Ganassi's quiet start continued, with Charlie Kimball leading the team with the 13th-best lap, leaving Dario Franchitti 17th and Scott Dixon 19th.
Also having a frustrating afternoon were Josef Newgarden, who was forced to park after developing a suspected gearbox problem, and Ana Beatriz, who missed the opening phase of the session while the Dale Coyne team worked on an unspecified mechanical glitch.
Pos Driver Team/Car Time Gap 1. Will Power Penske Dallara-Chevy 1m01.4467s 2. Ryan Hunter-Reay Andretti Dallara-Chevy 1m01.6252s + 0.1785s 3. Simona de Silvestro KV Dallara-Chevy 1m01.6895s + 0.2428s 4. Oriol Servia Panther/DRR Dallara-Chevy 1m01.7650s + 0.3183s 5. Takuma Sato Foyt Dallara-Honda 1m01.7703s + 0.3236s 6. Helio Castroneves Penske Dallara-Chevy 1m01.7853s + 0.3386s 7. Tony Kanaan KV Dallara-Chevy 1m01.8087s + 0.3620s 8. James Hinchcliffe Andretti Dallara-Chevy 1m02.0039s + 0.5572s 9. Tristan Vautier Schmidt Dallara-Honda 1m02.0459s + 0.5992s 10. Marco Andretti Andretti Dallara-Chevy 1m02.0877s + 0.6410s 11. James Jakes Rahal Dallara-Honda 1m02.1030s + 0.6563s 12. Simon Pagenaud Schmidt Dallara-Honda 1m02.1134s + 0.6667s 13. Charlie Kimball Ganassi Dallara-Honda 1m02.1962s + 0.7495s 14. Graham Rahal Rahal Dallara-Honda 1m02.3596s + 0.9129s 15. EJ Viso Andretti Dallara-Chevy 1m02.3622s + 0.9155s 16. Justin Wilson Coyne Dallara-Honda 1m02.3833s + 0.9366s 17. Dario Franchitti Ganassi Dallara-Honda 1m02.4086s + 0.9619s 18. Sebastien Bourdais Dragon Dallara-Chevy 1m02.4166s + 0.9699s 19. Scott Dixon Ganassi Dallara-Honda 1m02.5031s + 1.0564s 20. Alex Tagliani Herta Dallara-Honda 1m02.5098s + 1.0631s 21. Josef Newgarden Fisher Dallara-Honda 1m02.5305s + 1.0838s 22. Sebastian Saavedra Dragon Dallara-Chevy 1m02.5581s + 1.1114s 23. JR Hildebrand Panther/DRR Dallara-Chevy 1m02.9057s + 1.4590s 24. Ed Carpenter Carpenter Dallara-Chevy 1m03.1420s + 1.6953s 25. Ana Beatriz Coyne Dallara-Honda 1m03.9670s + 2.5203s